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The VTS recommends mariners confirm their position in the GIWW with their Electronic Chart Display and Information Systems (ECDIS).  Bolivar Aids to Navigation are set in shoal water.  The VTS recommends confirming Bolivar Peninsula Virtual Aids to Navigation 19A (Bolivar Peninsula 19A V-AIS, LLNR-35942) and 22 (LLNR-35947) prior to making the turn to/from Bolivar and/or into the Alternate Inbound Channel.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-94.77758,29.37902],[-94.78525,29.37291],[-94.78722,29.37171],[-94.78622,29.36877],[-94.78458,29.37104],[-94.77639,29.37807],[-94.77758,29.37902]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":25563,"geometry":{"type":"Polygon","coordinates":[[[-72.09796999999998,41.400630000000035],[-72.09917999999993,41.400420000000054],[-72.09735999999998,41.39609000000007],[-72.09265999999997,41.388190000000066],[-72.09121999999996,41.388690000000054],[-72.09796999999998,41.400630000000035]]]},"properties":{"ESRI_OID":25563,"MSI_UID":25563,"ATU":1,"TITLE":"Long Island Sound Eastern Part - New London Harbor/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381561,"MRN":"urn:mrn:iala:wwy:us:navIV:dis1:seclonislsouexcecozon:seclonislsoutersea:seclonislsousublanact:bloislsouandgarbay:lonislsoueaspar:newlonhar","WATERWAY_NAME":"New London Harbor","CREATE_DATE":1754575846000,"MODIFIED_DATE":1754575877000,"BEGIN_DATE":1754524800000,"END_DATE":1786147199000,"DESCRIPTION":"General/MSIB\n\nFrom: 2025-08-07 To: 2026-08-07\n\nLocation:\n41.40063° N / 72.09797° W\n41.38869° N / 72.09122° W\n41.38819° N / 72.09266° W\n41.39609° N / 72.09736° W\n41.40042° N / 72.09918° W\n41.40063° N / 72.09797° W\n\nThe Thames River federal navigation channel in the vicinity of the U.S. Naval Submarine Base on the Thames River has been reconfigured and narrowed. The Thames River Middle Range no longer marks the channel centerline and now marks the eastern channel edge along the outer boundary of the Naval Base security zone. 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For various reasons, many tows attempt to reconfigure between Morgans Point and Exxon to go into or come out of the USI Canal.  This practice has resulted in several near miss situations between Morgans Point and the Exxon Terminal in the Houston Ship Channel.  In order to fulfill the VTS mission of reducing risk of collision, allision, damage, pollution, and injury, the following Directive is in effect and will be written as policy in documentation updates to the U.S. Coast Guard VTS Houston-Galveston User Guide: • Vessel Traffic Service Houston-Galveston Directs no barge work in the Houston Ship Channel between Morgans Point and Exxon for purposes of going into/out of the USI Canal. • ","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-95.02709,29.73099],[-95.02962,29.72823],[-95.02649,29.72685],[-95.02344,29.72367],[-95.02228,29.72195],[-95.0222,29.70963],[-95.02115,29.70682],[-95.0202,29.70363],[-95.01638,29.70123],[-95.01215,29.7002],[-95.00527,29.69942],[-95.00027,29.69802],[-94.9972,29.69621],[-94.99243,29.69247],[-94.98701,29.68812],[-94.986,29.68635],[-94.98329,29.68264],[-94.98259,29.68173],[-94.98029,29.67681],[-94.97776,29.677],[-94.98046,29.68438],[-94.98347,29.68807],[-94.99368,29.6968],[-94.99947,29.70008],[-95.00385,29.70149],[-95.0111,29.70235],[-95.01394,29.70321],[-95.0163,29.70477],[-95.01818,29.70709],[-95.01909,29.70876],[-95.01943,29.71033],[-95.01951,29.71994],[-95.01969,29.72199],[-95.02037,29.72371],[-95.02153,29.72561],[-95.02544,29.72987],[-95.02709,29.73099]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":29581,"geometry":{"type":"Polygon","coordinates":[[[-76.76260999999994,7.783620000000042],[-76.77582999999998,8.523760000000038],[-76.02298999999994,9.212560000000053],[-75.52467999999999,9.367330000000038],[-75.41403999999994,10.368090000000052],[-75.16385999999994,10.70491000000004],[-74.82561999999996,10.978660000000048],[-74.33551999999997,10.619970000000023],[-74.06376999999998,11.191910000000064],[-73.22485999999998,11.173380000000066],[-71.66092999999995,12.296590000000037],[-71.36469999999997,12.087740000000053],[-72.09167999999994,11.592350000000067],[-71.63505999999995,10.596330000000023],[-70.04673999999994,11.372690000000034],[-68.88534999999996,11.312520000000063],[-68.53120999999999,11.090180000000032],[-68.20702999999997,10.369770000000074],[-66.28261999999995,10.50084000000004],[-65.87382999999994,10.106140000000039],[-65.09552999999994,9.925670000000025],[-63.045529999999985,10.560200000000066],[-62.89754999999997,10.26090000000005],[-63.083699999999965,9.977850000000046],[-62.56525999999997,9.988090000000057],[-62.219569999999976,9.508070000000032],[-62.01189999999997,9.66005000000007],[-61.694079999999985,9.471810000000062],[-61.55370999999997,9.695400000000063],[-60.783529999999985,9.19771000000003],[-56.995289999999954,9.197790000000055],[-47.97649999999993,9.952400000000068],[-42.86325999999997,12.016310000000033],[-50.81239999999997,18.027490000000057],[-58.44563999999997,23.116070000000036],[-64.95750999999996,26.906970000000058],[-78.29987999999997,33.87179000000003],[-79.58916999999997,34.91981000000004],[-82.36809999999997,35.33412000000004],[-85.66703999999999,35.11950000000007],[-85.33578999999997,32.82390000000004],[-84.16443999999996,32.23767000000004],[-84.06936999999994,31.97938000000005],[-84.90660999999994,30.773180000000025],[-84.86831999999998,30.161980000000028],[-84.23151999999999,30.114690000000053],[-84.23065999999994,29.409550000000024],[-87.23481999999996,21.650270000000035],[-86.94645999999995,21.149800000000027],[-87.87205999999998,19.72117000000003],[-87.67284999999998,19.51678000000004],[-87.83825999999999,18.677270000000078],[-88.08793999999995,18.995700000000056],[-88.44778999999994,18.468050000000062],[-88.22827999999998,18.164120000000025],[-88.43626999999998,16.702650000000062],[-89.05945999999994,15.924050000000022],[-88.14177999999998,15.547370000000058],[-87.67835999999994,15.781330000000025],[-86.37943999999999,15.634030000000052],[-85.97089999999997,15.884840000000054],[-84.32827999999995,15.702110000000062],[-84.15961999999996,15.241730000000075],[-83.37411999999995,15.00040000000007],[-83.55596999999995,14.83498000000003],[-83.34137999999996,14.325990000000047],[-83.63009999999997,13.752210000000048],[-84.00290999999999,11.274920000000066],[-83.52078999999998,10.316080000000056],[-82.48419999999999,9.334020000000066],[-82.34003999999999,8.907280000000071],[-81.12964999999997,8.653890000000047],[-79.59680999999995,9.455940000000055],[-78.98717999999997,9.409460000000024],[-78.10951999999997,9.111050000000034],[-76.76260999999994,7.783620000000042]]]},"properties":{"ESRI_OID":29581,"MSI_UID":29581,"ATU":7,"TITLE":"DISTRICT 7 MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1759503752000,"MODIFIED_DATE":1759503805000,"BEGIN_DATE":1759449600000,"END_DATE":1776556799000,"DESCRIPTION":"DISTRICT 7 MSI/General/MSIB\nFrom: 2025-10-03 \n29581\n\nFrom November to April the coastal waters between Cape Fear, NC and Sebastian Inlet, FL, are used as calving grounds by the critically endangered right whale. Right whales, including females with very young calves, may be encountered in offshore and coastal waters. Right whales are slow moving, often just below the water's surface, making them vulnerable to serious injury or death due to collisions with vessels. Collisions with whales are dangerous. Passengers can be injured and vessels badly damaged. U.S. regulation (50 CFR 224.105) prohibits operating vessels 65 feet (19.8 m) or greater in excess of 10 knots in specific managed locations along the U.S. east coast during times when right whales are likely to be present. See Compliance Guide for Right Whale Ship Strike Reduction Rule at the Reducing Vessel Strikes to North Atlantic Right Whales webpage (below) for specific times, areas, and exceptions to this regulation. Approaching or remaining within 500 yards of right whales is prohibited and is a violation of U.S. regulation. A minimum distance of 500 yards must be maintained from a sighted right whale unless hazardous to the vessel or its occupants. The National Oceanic and Atmospheric Administration (NOAA) recommends that operators assume that any whale sighting is a right whale unless confirmed otherwise. NOAA also recommends speeds of 10 knots or less in areas used by right whales and outside of seasonally managed areas when consistent with safety of navigation. NOAA also recommends operators use two-way whale avoidance routes within the WHALESSOUTH MSR area. Right whale sighting information is available at https://whalemap.org/ Please report all right whale sightings, collisions, or entanglements to 877-WHALE-HELP or to the Coast Guard via channel 16. The WHALESSOUTH Mandatory Ship Reporting area is active from November 15 to April 16. MSR arrival reports can be sent to rightwhale.msr(at)noaa.gov. For more information, see the Reducing Vessel Strikes to North Atlantic Right Whales webpage: https://www.fisheries.noaa.gov/national/endangered-species-conservation/reducing-vessel-strikes-north-atlantic-right-whales.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.76261,7.78362],[-76.77583,8.52376],[-76.02299,9.21256],[-75.52468,9.36733],[-75.41404,10.36809],[-75.16386,10.70491],[-74.82562,10.97866],[-74.33552,10.61997],[-74.06377,11.19191],[-73.22486,11.17338],[-71.66093,12.29659],[-71.3647,12.08774],[-72.09168,11.59235],[-71.63506,10.59633],[-70.04674,11.37269],[-68.88535,11.31252],[-68.53121,11.09018],[-68.20703,10.36977],[-66.28262,10.50084],[-65.87383,10.10614],[-65.09553,9.92567],[-63.04553,10.5602],[-62.89755,10.2609],[-63.0837,9.97785],[-62.56526,9.98809],[-62.21957,9.50807],[-62.0119,9.66005],[-61.69408,9.47181],[-61.55371,9.6954],[-60.78353,9.19771],[-56.99529,9.19779],[-47.9765,9.9524],[-42.86326,12.01631],[-50.8124,18.02749],[-58.44564,23.11607],[-64.95751,26.90697],[-78.29988,33.87179],[-79.58917,34.91981],[-82.3681,35.33412],[-85.66704,35.1195],[-85.33579,32.8239],[-84.16444,32.23767],[-84.06937,31.97938],[-84.90661,30.77318],[-84.86832,30.16198],[-84.23152,30.11469],[-84.23066,29.40955],[-87.23482,21.65027],[-86.94646,21.1498],[-87.87206,19.72117],[-87.67285,19.51678],[-87.83826,18.67727],[-88.08794,18.9957],[-88.44779,18.46805],[-88.22828,18.16412],[-88.43627,16.70265],[-89.05946,15.92405],[-88.14178,15.54737],[-87.67836,15.78133],[-86.37944,15.63403],[-85.9709,15.88484],[-84.32828,15.70211],[-84.15962,15.24173],[-83.37412,15.0004],[-83.55597,14.83498],[-83.34138,14.32599],[-83.6301,13.75221],[-84.00291,11.27492],[-83.52079,10.31608],[-82.4842,9.33402],[-82.34004,8.90728],[-81.12965,8.65389],[-79.59681,9.45594],[-78.98718,9.40946],[-78.10952,9.11105],[-76.76261,7.78362]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":30352,"geometry":{"type":"Polygon","coordinates":[[[-71.48687999999999,36.39679000000007],[-70.94690999999995,37.45028000000008],[-72.19186999999994,37.47378000000003],[-75.21868999999998,38.17937000000006],[-76.20296999999994,38.04695000000004],[-77.14648999999997,38.456660000000056],[-78.22878999999995,39.544340000000034],[-79.32525999999996,38.616750000000025],[-79.79050999999998,38.697100000000034],[-80.44512999999995,37.632580000000075],[-81.59799999999996,37.378550000000075],[-82.03860999999995,37.68041000000005],[-83.86541999999997,36.60304000000008],[-71.48687999999999,36.39679000000007]]]},"properties":{"ESRI_OID":30352,"MSI_UID":30352,"ATU":5,"TITLE":"Sector Virginia MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1760542522000,"MODIFIED_DATE":1772799359000,"BEGIN_DATE":1760486400000,"END_DATE":1776038399000,"DESCRIPTION":"The U.S. Coast Guard Sector Virginia Command Center's contact number has been updated. Effective immediately, the 24/7 contact number is: \n877-722-5727\nAll mariners, industry partners, and stakeholders are advised to update their records and use this number above for all phone communications with the Sector Virginia Command Center. Note that phone numbers throughout the organization, units, and departments are changing as the U.S. Coast Guard undergoes telephony modernization.\nFor questions or additional information, please contact Sector Virginia at this toll-free number or e-mail VirginiaWaterways@uscg.mil.\nMSI 30352.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-71.48688,36.39679],[-70.94691,37.45028],[-72.19187,37.47378],[-75.21869,38.17937],[-76.20297,38.04695],[-77.14649,38.45666],[-78.22879,39.54434],[-79.32526,38.61675],[-79.79051,38.6971],[-80.44513,37.63258],[-81.598,37.37855],[-82.03861,37.68041],[-83.86542,36.60304],[-71.48688,36.39679]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":31113,"geometry":{"type":"Polygon","coordinates":[[[-73.00743999999997,30.83014000000003],[-67.24102999999997,36.915400000000034],[-72.00682999999998,39.45998000000003],[-73.93738999999994,40.36479000000003],[-74.42557999999997,40.37203000000005],[-74.60186999999996,41.39328000000006],[-74.89867999999996,41.52928000000003],[-74.98857999999996,41.84925000000004],[-75.29236999999995,42.05513000000008],[-78.97347999999994,42.05725000000007],[-79.09090999999995,39.79459000000003],[-79.55683999999997,39.75946000000005],[-79.57891999999998,39.19696000000005],[-79.44207999999998,39.14372000000003],[-78.76068999999995,39.562380000000076],[-78.44416999999999,39.44930000000005],[-78.49138999999997,39.199370000000044],[-78.87876999999997,38.862340000000074],[-79.06604999999996,38.89605000000006],[-79.31950999999998,38.51932000000005],[-79.71746999999993,38.63933000000003],[-80.49983999999995,37.49369000000007],[-81.65478999999993,37.27970000000005],[-81.99500999999998,37.606670000000065],[-83.17900999999995,36.80761000000007],[-83.70716999999996,36.67670000000004],[-83.65629999999999,36.55062000000004],[-81.75317999999999,36.54083000000003],[-82.08245999999997,36.19226000000003],[-82.67086999999998,36.132520000000056],[-83.03302999999994,35.84030000000007],[-83.93194999999997,35.57707000000005],[-84.10462999999999,35.33681000000007],[-84.36502999999999,35.263450000000034],[-84.40241999999995,34.960050000000024],[-83.10328999999996,34.92879000000005],[-82.37980999999996,35.14256000000006],[-81.71803999999997,35.11196000000007],[-81.12648999999999,35.081270000000075],[-80.81825999999995,34.749730000000056],[-79.71164999999996,34.733190000000036],[-78.44681999999995,33.70319000000006],[-73.00743999999997,30.83014000000003]],[[-77.89519999999999,39.27461000000005],[-78.30057999999997,39.528350000000046],[-78.16426999999999,39.60925000000003],[-77.86532999999997,39.46198000000004],[-77.89519999999999,39.27461000000005]]]},"properties":{"ESRI_OID":31113,"MSI_UID":31113,"ATU":5,"TITLE":"DISTRICT 5 - CGD-E MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1761674794000,"MODIFIED_DATE":1769787027000,"BEGIN_DATE":1761609600000,"END_DATE":1777593599000,"DESCRIPTION":"District East - CGD-E - MSIB\nSPEED RESTRICTION IMPOSED TO PROTECT NORTH ATLANTIC RIGHT WHALES \n\n The Coast Guard advises all vessels transiting the Mid-Atlantic Ocean that the National Oceanic and Atmospheric Administration (NOAA) has established regulations which implement a 10 knot or less over ground speed restriction for all vessels 65 ft (19.8 m) or greater in specified locations (called Seasonal Management Areas or SMAs) during certain times of the year along the east coast of the U.S. Atlantic seaboard. These regulations are designed to protect endangered North Atlantic right whales by reducing the likelihood of collisions between ships and whales. \n\n  The 10 knot or less over ground speed restriction extends out 20 nautical miles around major mid-Atlantic ports. The speed restriction also applies in waters off New England and the southeastern U.S., where whales gather seasonally. \n\nThe speed restrictions apply in the Coast Guard East District from October 28, 2025 to April 30, 2026. \n\n - Mid-Atlantic U.S. areas from Brunswick, GA to Rhode Island from November 1 to April 30. \n\n For more information about how to comply with the Northern Right Whale Ship Strike Reduction Rule (50 CFR 224.105), please see the attached pamphlet or visit the NOAA website at: https://www.fisheries.noaa.gov/national/endangered-species-conservation/reducing-ship-strikes-north-atlantic-right-whales.\nMSI # 31113.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-73.00744,30.83014],[-67.24103,36.9154],[-72.00683,39.45998],[-73.93739,40.36479],[-74.42558,40.37203],[-74.60187,41.39328],[-74.89868,41.52928],[-74.98858,41.84925],[-75.29237,42.05513],[-78.97348,42.05725],[-79.09091,39.79459],[-79.55684,39.75946],[-79.57892,39.19696],[-79.44208,39.14372],[-78.76069,39.56238],[-78.44417,39.4493],[-78.49139,39.19937],[-78.87877,38.86234],[-79.06605,38.89605],[-79.31951,38.51932],[-79.71747,38.63933],[-80.49984,37.49369],[-81.65479,37.2797],[-81.99501,37.60667],[-83.17901,36.80761],[-83.70717,36.6767],[-83.6563,36.55062],[-81.75318,36.54083],[-82.08246,36.19226],[-82.67087,36.13252],[-83.03303,35.8403],[-83.93195,35.57707],[-84.10463,35.33681],[-84.36503,35.26345],[-84.40242,34.96005],[-83.10329,34.92879],[-82.37981,35.14256],[-81.71804,35.11196],[-81.12649,35.08127],[-80.81826,34.74973],[-79.71165,34.73319],[-78.44682,33.70319],[-73.00744,30.83014]],[[-77.8952,39.27461],[-78.30058,39.52835],[-78.16427,39.60925],[-77.86533,39.46198],[-77.8952,39.27461]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":31220,"geometry":{"type":"Polygon","coordinates":[[[-93.21122999999994,30.258170000000064],[-93.23740999999995,30.257970000000057],[-93.23692999999997,30.24067000000008],[-93.21098999999998,30.240680000000054],[-93.21122999999994,30.258170000000064]]]},"properties":{"ESRI_OID":31220,"MSI_UID":31220,"ATU":8,"TITLE":"General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116856986,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:sechouexcecozon:sechoutersea:sechousublanact:calriv","WATERWAY_NAME":"Calcasieu River","CREATE_DATE":1761766464000,"MODIFIED_DATE":1761821732000,"BEGIN_DATE":1761696000000,"END_DATE":1777679999000,"DESCRIPTION":"MSIB 18-25 --- North Calcasieu River Navigational Considerations --- Due to several documented near miss situations investigated by U.S. Coast Guard MSU Lake Charles, this Marine Safety Information Bulletin (MSIB) is to bring heightened awareness to all commercial vessels with anticipated voyages to the unique waterway features in the north Calcasieu Ship Channel. Specifically, the northeast sections of Mile Marker 16.0, and the area southeast of the Calcasieu Saltwater Barrier leading to applicable commercial waterfront facilities.  Mariners are advised that this waterway features sharp winding turns, shoaling along the banks, and the presence of private docks and residential structures along the shoreline.  These characteristics, particularly near the Saltwater Barrier and southward, may present navigational challenges for transiting vessels and tows.  For all commercial vessels transiting through this area, consideration should be given to the voyage plan and navigational assessments, provision of suitable lookouts, and awareness of shoals, private docks and residential structures.  Consider the assessment of safe speed to enable timely and effective maneuvers to mitigate the risks of collision, allision, or grounding.  These considerations are not exhaustive and do not supersede navigation rules, sound mariner judgment, or good seamanship.  Compliance with a vessel’s Towing Safety Management System (TSMS), where applicable, remains essential.  All commercial vessel operators are strongly encouraged to share this MSIB with their vessel crews during voyage planning for transits through this area.  For questions about this MSIB, mariners should contact the MSU Lake Charles Casualty Investigations Division inbox at: LakeCharlesIO@uscg.mil.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-93.21123,30.25817],[-93.23741,30.25797],[-93.23693,30.24067],[-93.21099,30.24068],[-93.21123,30.25817]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":31835,"geometry":{"type":"Polygon","coordinates":[[[-76.11789999999996,36.98364000000004],[-76.12538999999998,36.96766000000008],[-76.10189999999994,36.961430000000064],[-76.09500999999995,36.97789000000006],[-76.11789999999996,36.98364000000004]]]},"properties":{"ESRI_OID":31835,"MSI_UID":31835,"ATU":5,"TITLE":"Sector Virginia MSI/Chesapeake Channel - Thimble Shoal Channel/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116382624,"MRN":"urn:mrn:iala:wwy:us:navIV:dis5:secvirexcecozon:secvirtersea:secvirsublanact:checha:thishocha","WATERWAY_NAME":"Thimble Shoal Channel","CREATE_DATE":1762961523000,"MODIFIED_DATE":1769786854000,"BEGIN_DATE":1762905600000,"END_DATE":1778543999000,"DESCRIPTION":"MSIB 149-25 - November 7, 2025\n\nEmergency Contact Update - Chesapeake Bay Bridge Tunnel\n\nTo ensure safe navigation and transit, mariners are advised to exercise caution when transiting through the Thimble Shoal Channel and Chesapeake Channel of the Chesapeake Bay Bridge Tunnel (CBBT) within the Main Channel and Auxiliary Channels. \n\nIn the instance of potential emergency maneuvering between Islands 1 and 2, and Islands 3 and 4, immediately contact the CBBT Police at (757) 331-8950 or VHF Channel 11 or 13. \n\nFor urgent safety of life issues, please contact the Sector Virginia Command Center on VHF Channel 16 or call (877) 722-5727. For any other questions relating to this bulletin, please contact the Waterways Management Division Duty Watchstander via email VirginiaWaterways@uscg.mil. \nMSI # 31835.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.1179,36.98364],[-76.12539,36.96766],[-76.1019,36.96143],[-76.09501,36.97789],[-76.1179,36.98364]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":31836,"geometry":{"type":"Polygon","coordinates":[[[-76.07019999999994,37.051540000000045],[-76.08496999999994,37.04147000000006],[-76.07079999999996,37.028860000000066],[-76.05637999999993,37.03907000000004],[-76.07019999999994,37.051540000000045]]]},"properties":{"ESRI_OID":31836,"MSI_UID":31836,"ATU":5,"TITLE":"Sector Virginia MSI/Sector Virginia, Submerged Land Act (SLA) - Chesapeake Channel/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117224627,"MRN":"urn:mrn:iala:wwy:us:navIV:dis5:secvirexcecozon:secvirtersea:secvirsublanact:checha","WATERWAY_NAME":"Chesapeake Channel","CREATE_DATE":1762961616000,"MODIFIED_DATE":1769786838000,"BEGIN_DATE":1762905600000,"END_DATE":1778543999000,"DESCRIPTION":"SEC VA MSIB 149-25 - November 7, 2025\n\nEmergency Contact Update - Chesapeake Bay Bridge Tunnel\n\nTo ensure safe navigation and transit, mariners are advised to exercise caution when transiting through the Thimble Shoal Channel and Chesapeake Channel of the Chesapeake Bay Bridge Tunnel (CBBT) within the Main Channel and Auxiliary Channels. \n\nIn the instance of potential emergency maneuvering between Islands 1 and 2, and Islands 3 and 4, immediately contact the CBBT Police at (757) 331-8950 or VHF Channel 11 or 13. \n\nFor urgent safety of life issues, please contact the Sector Virginia Command Center on VHF Channel 16 or call (877) 722-5727. For any other questions relating to this bulletin, please contact the Waterways Management Division Duty Watchstander via email VirginiaWaterways@uscg.mil. \nMSI # 31836.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.0702,37.05154],[-76.08497,37.04147],[-76.0708,37.02886],[-76.05638,37.03907],[-76.0702,37.05154]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":33797,"geometry":{"type":"Polygon","coordinates":[[[-95.10976999999997,49.51219000000003],[-95.37615999999997,49.13342000000006],[-97.45435999999995,49.00861000000003],[-96.72397999999998,46.189050000000066],[-87.43659999999994,46.16277000000008],[-86.93044999999995,45.90446000000003],[-88.25207999999998,44.36802000000006],[-88.07060999999999,44.432390000000055],[-87.72859999999997,44.41186000000005],[-87.35730999999998,44.46194000000003],[-86.87106999999997,44.57499000000007],[-86.49917999999997,44.569180000000074],[-86.03951999999998,44.56198000000006],[-85.74354999999997,44.555120000000045],[-82.37310999999994,44.54275000000007],[-82.15447999999998,44.688420000000065],[-82.32199999999995,45.39300000000003],[-83.32156999999995,45.807930000000056],[-83.23494999999997,46.053300000000036],[-83.77030999999994,46.171730000000025],[-83.97089999999997,46.62247000000008],[-84.42784999999998,46.61760000000004],[-84.72245999999996,46.99312000000003],[-88.26239999999996,48.42747000000003],[-89.37228999999996,48.121800000000064],[-90.86418999999995,48.37919000000005],[-91.54036999999994,48.19749000000007],[-92.87674999999996,48.75782000000004],[-94.39627999999999,48.84257000000008],[-94.62075999999996,49.39318000000003],[-95.10976999999997,49.51219000000003]]]},"properties":{"ESRI_OID":33797,"MSI_UID":33797,"ATU":9,"TITLE":"Sector Northern Great Lakes MSI/Lake Superior - ST MARYS RIVER TO AU SABLE POINT/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116386381,"MRN":"urn:mrn:iala:wwy:us:navIV:dis9:stlawsea:lakont:lowniariv:niariv:lakeri:wesendoflakeri:detriv:lakstcla:stclariv:lakhur:saimarriv:laksup:stmarrivtoausabpoi","WATERWAY_NAME":"ST MARYS RIVER TO AU SABLE POINT","CREATE_DATE":1765547390000,"MODIFIED_DATE":1765988152000,"BEGIN_DATE":1765411200000,"END_DATE":1780963199000,"DESCRIPTION":"Commander Coast Guard Sector Northern Great Lakes Commenced Operation Taconite.\n \nAt the start of each voyage or transit, to enhance the coordination of ice breaking resources, COTP Norther Great Lakes directs all shipping companies to provide an estimated time of arrival for their vessels downbound to Whitefish Point, upbound to Detour Reef LT, Eastbound to Lansing Shoal LT, Westbound to Round Island, or arriving or departing from any of the Western Superior ports and terminals.\n \nSimilarly, for vessels operating in Lake Michigan in the presence of ice, all shipping companies should provide an estimated time of arrival for vessels entering the Sturgeon Bay Ship Canal, Rock Island Passage or when arriving or departing Escanaba, Green Bay, Marinette or any other ports and terminals within Green Bay.\n \nEstimated time of arrivals must be received six hours prior to a vessels arrival to any of these points or once a day by 1000 (eastern). position reports may be filed with \"Sault Traffic\" either by landline (906.635.3299), fax (906.635.3238), or email (sootfc@uscg.mil).\n \nA vessels ETA must be updated whenever the arrival time changes by more than six hours.\n\nMariners are asked to establish VHF radio contact with the servicing icebreaker on VHF-FM channel 16 approximately one hour before reaching the appropriate service area.\n \n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-95.10977,49.51219],[-95.37616,49.13342],[-97.45436,49.00861],[-96.72398,46.18905],[-87.4366,46.16277],[-86.93045,45.90446],[-88.25208,44.36802],[-88.07061,44.43239],[-87.7286,44.41186],[-87.35731,44.46194],[-86.87107,44.57499],[-86.49918,44.56918],[-86.03952,44.56198],[-85.74355,44.55512],[-82.37311,44.54275],[-82.15448,44.68842],[-82.322,45.393],[-83.32157,45.80793],[-83.23495,46.0533],[-83.77031,46.17173],[-83.9709,46.62247],[-84.42785,46.6176],[-84.72246,46.99312],[-88.2624,48.42747],[-89.37229,48.1218],[-90.86419,48.37919],[-91.54037,48.19749],[-92.87675,48.75782],[-94.39628,48.84257],[-94.62076,49.39318],[-95.10977,49.51219]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":36962,"geometry":{"type":"Polygon","coordinates":[[[-70.84516999999994,42.519130000000075],[-70.98592999999994,42.42492000000004],[-71.01202999999998,42.39653000000004],[-71.07725999999997,42.39552000000003],[-71.07793999999996,42.357480000000066],[-71.01133999999996,42.332100000000025],[-71.05047999999994,42.30367000000007],[-70.96121999999997,42.22846000000004],[-70.81770999999998,42.263540000000035],[-70.71882999999997,42.208120000000065],[-70.41738999999995,42.343270000000075],[-70.47781999999995,42.44874000000004],[-70.84516999999994,42.519130000000075]]]},"properties":{"ESRI_OID":36962,"MSI_UID":36962,"ATU":1,"TITLE":"Boston South Channel - Boston North Channel/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381959,"MRN":"urn:mrn:iala:wwy:us:navIV:dis1:secbosexcecozon:secbostersea:secbossublanact:bossoucha:bosnorcha","WATERWAY_NAME":"Boston North Channel","CREATE_DATE":1770896571000,"MODIFIED_DATE":1770896578000,"BEGIN_DATE":1770854400000,"END_DATE":1776211199000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-02-12 To: 2026-04-14\n\nNotice of Proposed Rulemaking - Special local regulation, Temporary anchorage ground suspension, and Safety and Security Zones: Sail Boston, 250th Anniversary 2026; Boston Harbor, Boston, MA.\nThis bulletin addresses a Notice of Proposed Rulemaking – “Special local regulation, Temporary anchorage ground suspension, and Safety and Security Zones: Sail Boston, 250th Anniversary 2026; Boston Harbor, Boston, MA.”\n1.\nThe Coast Guard is proposing to establish temporary regulations, including special local regulations and multiple safety and security zones, and to temporarily suspend certain anchorage grounds in Boston Harbor, Boston, MA between July 10 and July 16, 2026. These regulations are necessary to promote the safe navigation of vessels and safety of life during ‘Sail Boston,’ a gathering of tall ships and military ships to celebrate the 250th Anniversary of the founding of the United States.\n2.\nDue to the likely high concentration of spectator and participant vessels attending the series of events, the Coast Guard Northeast District Commander and the Captain of the Port, Sector Boston, have determined these proposed regulations are necessary to ensure the safety of the ‘Sail Boston’ participants and spectators, and their vessels while operating in and around the Port of Boston before, during, and after the scheduled events are completed.\n3.\nThe complete rulemaking is available under Federal Register docket number USCG-2025-0707 and can be accessed through the federal portal at https://www.regulations.gov/search?filter=uscg-2025-0707.\n4.\nWe invite your comments on this rulemaking. To submit your comment online, go to https://www.regulations.gov, and insert “USCG-2025-0707” in the “search box”. Click “Search” and then click “Comment.” We will consider all comments and material received on or before April 13, 2026.\n5.\nFor questions regarding this Marine Safety Information Bulletin contact Mr. Craig Lapiejko, Waterways Management at Coast Guard Northeast District, telephone (571) 607-6314, e-mail craig.d.lapiejko@uscg.mil.\nMatthew B. Stuck, Coast Guard Northeast District Chief of Waterways Management, sends","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-70.84517,42.51913],[-70.98593,42.42492],[-71.01203,42.39653],[-71.07726,42.39552],[-71.07794,42.35748],[-71.01134,42.3321],[-71.05048,42.30367],[-70.96122,42.22846],[-70.81771,42.26354],[-70.71883,42.20812],[-70.41739,42.34327],[-70.47782,42.44874],[-70.84517,42.51913]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":37029,"geometry":{"type":"Polygon","coordinates":[[[-75.99887999999999,36.57695000000007],[-76.06616999999994,36.57474000000008],[-75.98239999999998,36.132340000000056],[-75.85742999999997,36.13789000000003],[-75.99887999999999,36.57695000000007]]]},"properties":{"ESRI_OID":37029,"MSI_UID":37029,"ATU":5,"TITLE":"Great Bridge To Albemarle Sound/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116382887,"MRN":"urn:mrn:iala:wwy:us:navIV:dis5:secvirsecnorcarexcecozon:secvirsecnorcartersea:secvirsecnorcarexcecozon:oreinl:pamsou:crosou:albsou:grebritoalbsou","WATERWAY_NAME":"Great Bridge To Albemarle Sound","CREATE_DATE":1770921334000,"MODIFIED_DATE":1770926277000,"BEGIN_DATE":1770854400000,"END_DATE":1786492799000,"DESCRIPTION":"General/MSIB\n\nAll mariners are advised the U.S. Coast Guard has received multiple reports of damaged and off-station aids to navigation (ATON) in the northern portion of the Atlantic Intracoastal Waterway (AICW) in North Carolina.\n\nRecent ice flow and severe weather events have resulted in damage to both fixed aids and floating buoys.  As a result, aids to navigation from the Great Bridge to Albemarle Sound Light 173 (LLNR 37820) north to the North Carolina–Virginia state line may be unreliable and/or off station.\n\nMariners are urged to exercise extreme caution when transiting this area.\n\nTo report additional discrepancies or for further information, contact the Sector North Carolina Command Center at (833) 732-8628.\n\nFrom: 2026-02-12 To: 2026-08-11\n\nLocation:\n36-34-37.020N/075-59-55.968W\n36-08-16.404N/075-51-26.748W\n36-07-56.424N/075-58-56.640W\n36-34-29.064N/076-03-58.212W\n36-34-37.020N/075-59-55.968W\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-75.99888,36.57695],[-76.06617,36.57474],[-75.9824,36.13234],[-75.85743,36.13789],[-75.99888,36.57695]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":37972,"geometry":{"type":"Polygon","coordinates":[[[-85.83876999999995,24.65330000000006],[-83.90578999999997,29.350270000000023],[-83.91228999999998,30.30803000000003],[-84.57308999999998,30.403350000000046],[-84.57251999999994,30.722540000000038],[-83.72809999999998,31.907230000000027],[-83.86010999999996,32.38245000000006],[-85.02223999999995,32.981100000000026],[-85.43489999999997,34.66343000000006],[-86.25517999999994,34.30780000000004],[-88.13701999999995,34.474050000000034],[-88.56853999999998,34.61811000000006],[-88.78859999999997,35.147460000000024],[-90.25727999999998,34.89570000000003],[-90.83132999999998,34.035060000000044],[-90.94803999999993,33.26222000000007],[-90.14380999999997,33.08283000000006],[-90.86748999999998,32.41316000000006],[-90.91131999999999,31.762870000000078],[-91.32119999999998,31.665230000000065],[-91.22725999999994,30.945750000000032],[-89.97107999999997,30.850720000000024],[-89.75409999999994,30.125000000000057],[-89.28137999999996,30.023540000000025],[-88.17263999999994,28.910480000000064],[-88.13760999999994,25.68966000000006],[-86.45902999999998,26.301390000000026],[-86.71126999999996,25.153130000000033],[-85.83876999999995,24.65330000000006]]]},"properties":{"ESRI_OID":37972,"MSI_UID":37972,"ATU":8,"TITLE":"Sector Mobile MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1772198454000,"MODIFIED_DATE":1772198466000,"BEGIN_DATE":1753401600000,"END_DATE":1861919999000,"DESCRIPTION":"Marine Safety Alert 02-24 - Inspections and Compliance Directorate --- DANGEROUS BYCATCH FROM DISCARDED MUNITIONS REMAINS A PRESENT DAY HAZARD --- This Safety Alert is being issued to raise awareness of lurking hazards caused by discarded munitions, which often contain active explosives or chemical agents. Although the practice of dumping munitions into the sea ceased in 1970, a significant amount remains hidden in coastal waters, posing a safety hazard to commercial fisherman, dredge operators, and others who trawl and work the ocean floor. \nRecently, a deckhand on a clamming vessel was severely burned when a canister was dredged up and brought onboard with clams and other debris. The canister likely contained mustard gas or another blistering agent, but did not display any obvious visual, audible, or odor indicators of discharging content. A member of the crew discovered the canister and threw it back overboard. Several hours later he developed a severe rash that required professional medical treatment. \nMustard gas is a chemical weapon developed during World War I. Millions of pounds of this product, other chemical weapons, bombs, torpedoes, artillery shells, and munitions were routinely disposed of and remain in U.S. coastal waters. Although many munition dump areas are well marked on navigation charts, numerous areas where munitions were discarded remain unmarked. There is also evidence suggesting that munitions were frequently “short dumped,” meaning dumped outside of the designated areas by contractors hired to take them to the intended locations. \nThe Coast Guard previously issued Safety Alert 11-16 and Safety Alert 6-10 on this same topic and continues to strongly recommend that persons involved in the fishing and dredging industries: \nReview their navigational charts to ensure the areas in which they are trawling or dredging are not near labeled “Explosives Dumping Areas.” Such areas must be given wide berth and seafarers should recognize that surface bottoms change and that objects can move significant distances from their original disposal areas. \nReview and follow recommendations from the Maritime Industry 3Rs Explosive Safety Guide. \nCarefully record the position of any munitions encountered and returned to the sea. \nImmediately report discovery to the National Response Center, at (800) 424-8802 to ensure a proper response and potential recovery. Alternatively, the local U.S. Coast Guard unit may be notified via VHF-FM Channel 16.  This Safety Alert is provided for informational purposes only and does not relieve any domestic or international safety, operational, or material requirement. Developed by the Office of Commercial Vessel Compliance (CG-CVC) and distributed by the Office of Investigations and Casualty Analysis (CG-INV). Questions may be submitted to HQS-SMB-CGINV@uscg.mil.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-85.83877,24.6533],[-83.90579,29.35027],[-83.91229,30.30803],[-84.57309,30.40335],[-84.57252,30.72254],[-83.7281,31.90723],[-83.86011,32.38245],[-85.02224,32.9811],[-85.4349,34.66343],[-86.25518,34.3078],[-88.13702,34.47405],[-88.56854,34.61811],[-88.7886,35.14746],[-90.25728,34.8957],[-90.83133,34.03506],[-90.94804,33.26222],[-90.14381,33.08283],[-90.86749,32.41316],[-90.91132,31.76287],[-91.3212,31.66523],[-91.22726,30.94575],[-89.97108,30.85072],[-89.7541,30.125],[-89.28138,30.02354],[-88.17264,28.91048],[-88.13761,25.68966],[-86.45903,26.30139],[-86.71127,25.15313],[-85.83877,24.6533]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":38353,"geometry":{"type":"Polygon","coordinates":[[[-88.06863999999996,30.670930000000055],[-88.14004999999997,30.372810000000072],[-88.29934999999995,30.377550000000042],[-88.50809999999996,30.38703000000004],[-88.78824999999995,30.458080000000052],[-89.42819999999995,30.35800000000006],[-89.53059999999994,30.192180000000064],[-89.52990999999997,30.155380000000036],[-89.18383999999998,30.16429000000005],[-88.82437999999996,29.79735000000005],[-88.00315999999998,28.970840000000067],[-87.92856999999998,25.901650000000075],[-86.52463999999998,26.524320000000046],[-86.15573999999998,26.28173000000004],[-84.07570999999996,29.38626000000005],[-84.07605999999998,30.102460000000065],[-84.20282999999995,30.13512000000003],[-84.26942999999994,30.113140000000044],[-84.34633999999994,30.07988000000006],[-84.54477999999995,30.012260000000026],[-85.25751999999994,29.72765000000004],[-85.63241999999997,30.245070000000055],[-86.38498999999996,30.566340000000025],[-87.12656999999996,30.549780000000055],[-87.76651999999996,30.225790000000075],[-87.91482999999994,30.64730000000003],[-88.06863999999996,30.670930000000055]]]},"properties":{"ESRI_OID":38353,"MSI_UID":38353,"ATU":8,"TITLE":"Sector Mobile, Exclusive Economic Zone (EEZ)/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116384629,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secmobexcecozon","WATERWAY_NAME":"Sector Mobile, Exclusive Economic Zone (EEZ)","CREATE_DATE":1772631258000,"MODIFIED_DATE":1772631495000,"BEGIN_DATE":1753401600000,"END_DATE":1798761599000,"DESCRIPTION":"Marine Safety Alert 02-24 - Inspections and Compliance Directorate --- DANGEROUS BYCATCH FROM DISCARDED MUNITIONS REMAINS A PRESENT DAY HAZARD --- This Safety Alert is being issued to raise awareness of lurking hazards caused by discarded munitions, which often contain active explosives or chemical agents. Although the practice of dumping munitions into the sea ceased in 1970, a significant amount remains hidden in coastal waters, posing a safety hazard to commercial fisherman, dredge operators, and others who trawl and work the ocean floor. \nRecently, a deckhand on a clamming vessel was severely burned when a canister was dredged up and brought onboard with clams and other debris. The canister likely contained mustard gas or another blistering agent, but did not display any obvious visual, audible, or odor indicators of discharging content. A member of the crew discovered the canister and threw it back overboard. Several hours later he developed a severe rash that required professional medical treatment. \nMustard gas is a chemical weapon developed during World War I. Millions of pounds of this product, other chemical weapons, bombs, torpedoes, artillery shells, and munitions were routinely disposed of and remain in U.S. coastal waters. Although many munition dump areas are well marked on navigation charts, numerous areas where munitions were discarded remain unmarked. There is also evidence suggesting that munitions were frequently “short dumped,” meaning dumped outside of the designated areas by contractors hired to take them to the intended locations. \nThe Coast Guard previously issued Safety Alert 11-16 and Safety Alert 6-10 on this same topic and continues to strongly recommend that persons involved in the fishing and dredging industries: \nReview their navigational charts to ensure the areas in which they are trawling or dredging are not near labeled “Explosives Dumping Areas.” Such areas must be given wide berth and seafarers should recognize that surface bottoms change and that objects can move significant distances from their original disposal areas. \nReview and follow recommendations from the Maritime Industry 3Rs Explosive Safety Guide. \nCarefully record the position of any munitions encountered and returned to the sea. \nImmediately report discovery to the National Response Center, at (800) 424-8802 to ensure a proper response and potential recovery. Alternatively, the local U.S. Coast Guard unit may be notified via VHF-FM Channel 16.  This Safety Alert is provided for informational purposes only and does not relieve any domestic or international safety, operational, or material requirement. Developed by the Office of Commercial Vessel Compliance (CG-CVC) and distributed by the Office of Investigations and Casualty Analysis (CG-INV). 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In a winter status, some aids to navigation are, removed, reduced in in their size or light intensity, or unlighted when normally lighted during the summer season. MSI # 38463\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-72.21908,37.16736],[-70.98408,37.17623],[-70.30175,37.76225],[-69.06649,37.9851],[-72.90418,39.97672],[-74.33226,40.45306],[-74.50272,41.42487],[-75.24379,42.12775],[-79.09563,42.07401],[-79.13887,39.61361],[-75.97475,39.57138],[-75.81124,38.33849],[-74.50395,38.28816],[-72.21908,37.16736]],[[-75.635,41.99876],[-75.63046,41.99876],[-75.63046,41.99876],[-75.63048,41.99876],[-75.63048,41.99876],[-75.635,41.99876]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":38493,"geometry":{"type":"Polygon","coordinates":[[[-72.22621999999996,37.167430000000024],[-72.09883999999994,37.43916000000007],[-74.35297999999995,38.57481000000007],[-75.50880999999998,38.61089000000004],[-75.70422999999994,39.86160000000007],[-79.66892999999999,39.76150000000007],[-79.52930999999995,39.05648000000008],[-78.69447999999994,39.49957000000006],[-77.99794999999995,39.43619000000007],[-78.15303999999998,38.97830000000005],[-77.68501999999995,38.461820000000046],[-76.31239999999997,37.745790000000056],[-75.25253999999995,37.870430000000056],[-72.22621999999996,37.167430000000024]]]},"properties":{"ESRI_OID":38493,"MSI_UID":38493,"ATU":5,"TITLE":"Sector Maryland - NCR MSI/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":null,"MRN":null,"WATERWAY_NAME":null,"CREATE_DATE":1772799601000,"MODIFIED_DATE":1772799640000,"BEGIN_DATE":1772668800000,"END_DATE":1780531199000,"DESCRIPTION":"DISTRICT 5 - CGD-E MSI/General/MSIB\n\nFrom: 2026-03-05 To: 2026-06-03\n\nDue to a government funding lapse for the Department of Homeland Security, the Coast Guard may be delayed in the process of returning seasonal aids to navigation to a summer status. In a winter status, some aids to navigation are, removed, reduced in in their size or light intensity, or unlighted when normally lighted during the summer season. MSI # 38493\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-72.22622,37.16743],[-72.09884,37.43916],[-74.35298,38.57481],[-75.50881,38.61089],[-75.70423,39.8616],[-79.66893,39.7615],[-79.52931,39.05648],[-78.69448,39.49957],[-77.99795,39.43619],[-78.15304,38.9783],[-77.68502,38.46182],[-76.3124,37.74579],[-75.25254,37.87043],[-72.22622,37.16743]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":38769,"geometry":{"type":"Polygon","coordinates":[[[-90.69045999999997,29.15279000000004],[-90.88088999999997,29.148960000000045],[-90.87972999999994,29.072400000000073],[-90.95425999999998,29.071920000000034],[-90.95553999999998,29.041030000000035],[-90.65468999999996,29.04119000000003],[-90.65725999999995,29.07096000000007],[-90.68746999999996,29.070640000000026],[-90.69045999999997,29.15279000000004]]]},"properties":{"ESRI_OID":38769,"MSI_UID":38769,"ATU":8,"TITLE":"Houma Navigation Canal - Timbalier Terrebonne Bay/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116384847,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:catislpas:hounavcan:timterbay","WATERWAY_NAME":"Timbalier Terrebonne Bay","CREATE_DATE":1773072387000,"MODIFIED_DATE":1774876742000,"BEGIN_DATE":1772409600000,"END_DATE":1777593599000,"DESCRIPTION":"U.S. Coast Guard Captain of the Port Houma MSIB 04-26 --- NAVIGATION ALERT: UPDATE TO OIL RECOVERY OPERATIONS OFFSHORE PORT FOURCHON ---\nOil recovery operations involving multiple vessels is taking place within Terrebonne Bay and Caillou Bay. These conditions and operations may impact vessels transiting through Oyster Bayou and Bayou Grand Caillou.  Based on new reports and sightings within Oyster Bayou/Bayou Grand Caillou, mariners are advised to be especially cautious in these areas.  Vessels transiting in and out of the Houma Navigation Canal, extending west to the Atchafalaya River, are advised to exercise caution.  Mariners can contact Clean Gulf Associates for current environmental conditions.  Vessels should avoid oiled waterways and plan their voyages accordingly.  For further information on this bulletin or to report any concerns regarding the status of waterways, mariners can contact one of the phone numbers below:\nMarine Safety Unit Houma Waterways Management: (985) 665-2449, \nClean Gulf Associates: (888) 242-2007, \nLouisiana Offshore Oil Port Vessel Traffic Center: (985) 632-1423","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-90.69046,29.15279],[-90.88089,29.14896],[-90.87973,29.0724],[-90.95426,29.07192],[-90.95554,29.04103],[-90.65469,29.04119],[-90.65726,29.07096],[-90.68747,29.07064],[-90.69046,29.15279]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":39106,"geometry":{"type":"Polygon","coordinates":[[[-76.76260999999994,7.783620000000042],[-76.77582999999998,8.523760000000038],[-76.02298999999994,9.212560000000053],[-75.52467999999999,9.367330000000038],[-75.41403999999994,10.368090000000052],[-75.16385999999994,10.70491000000004],[-74.82561999999996,10.978660000000048],[-74.33551999999997,10.619970000000023],[-74.06376999999998,11.191910000000064],[-73.22485999999998,11.173380000000066],[-71.66092999999995,12.296590000000037],[-71.36469999999997,12.087740000000053],[-72.09167999999994,11.592350000000067],[-71.63505999999995,10.596330000000023],[-70.04673999999994,11.372690000000034],[-68.88534999999996,11.312520000000063],[-68.53120999999999,11.090180000000032],[-68.20702999999997,10.369770000000074],[-66.28261999999995,10.50084000000004],[-65.87382999999994,10.106140000000039],[-65.09552999999994,9.925670000000025],[-63.045529999999985,10.560200000000066],[-62.89754999999997,10.26090000000005],[-63.083699999999965,9.977850000000046],[-62.56525999999997,9.988090000000057],[-62.219569999999976,9.508070000000032],[-62.01189999999997,9.66005000000007],[-61.694079999999985,9.471810000000062],[-61.55370999999997,9.695400000000063],[-60.783529999999985,9.19771000000003],[-56.995289999999954,9.197790000000055],[-47.97649999999993,9.952400000000068],[-42.86325999999997,12.016310000000033],[-50.81239999999997,18.027490000000057],[-58.44563999999997,23.116070000000036],[-64.95750999999996,26.906970000000058],[-78.29987999999997,33.87179000000003],[-79.58916999999997,34.91981000000004],[-82.36809999999997,35.33412000000004],[-85.66703999999999,35.11950000000007],[-85.33578999999997,32.82390000000004],[-84.16443999999996,32.23767000000004],[-84.06936999999994,31.97938000000005],[-84.90660999999994,30.773180000000025],[-84.86831999999998,30.161980000000028],[-84.23151999999999,30.114690000000053],[-84.23065999999994,29.409550000000024],[-87.23481999999996,21.650270000000035],[-86.94645999999995,21.149800000000027],[-87.87205999999998,19.72117000000003],[-87.67284999999998,19.51678000000004],[-87.83825999999999,18.677270000000078],[-88.08793999999995,18.995700000000056],[-88.44778999999994,18.468050000000062],[-88.22827999999998,18.164120000000025],[-88.43626999999998,16.702650000000062],[-89.05945999999994,15.924050000000022],[-88.14177999999998,15.547370000000058],[-87.67835999999994,15.781330000000025],[-86.37943999999999,15.634030000000052],[-85.97089999999997,15.884840000000054],[-84.32827999999995,15.702110000000062],[-84.15961999999996,15.241730000000075],[-83.37411999999995,15.00040000000007],[-83.55596999999995,14.83498000000003],[-83.34137999999996,14.325990000000047],[-83.63009999999997,13.752210000000048],[-84.00290999999999,11.274920000000066],[-83.52078999999998,10.316080000000056],[-82.48419999999999,9.334020000000066],[-82.34003999999999,8.907280000000071],[-81.12964999999997,8.653890000000047],[-79.59680999999995,9.455940000000055],[-78.98717999999997,9.409460000000024],[-78.10951999999997,9.111050000000034],[-76.76260999999994,7.783620000000042]]]},"properties":{"ESRI_OID":39106,"MSI_UID":39106,"ATU":7,"TITLE":"DISTRICT 7 - 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Mariners are urged to transit with caution and report any discrepancies with the LNM to the Coast Guard by emailing d07-smb-d7-lnm@uscg.mil","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.76261,7.78362],[-76.77583,8.52376],[-76.02299,9.21256],[-75.52468,9.36733],[-75.41404,10.36809],[-75.16386,10.70491],[-74.82562,10.97866],[-74.33552,10.61997],[-74.06377,11.19191],[-73.22486,11.17338],[-71.66093,12.29659],[-71.3647,12.08774],[-72.09168,11.59235],[-71.63506,10.59633],[-70.04674,11.37269],[-68.88535,11.31252],[-68.53121,11.09018],[-68.20703,10.36977],[-66.28262,10.50084],[-65.87383,10.10614],[-65.09553,9.92567],[-63.04553,10.5602],[-62.89755,10.2609],[-63.0837,9.97785],[-62.56526,9.98809],[-62.21957,9.50807],[-62.0119,9.66005],[-61.69408,9.47181],[-61.55371,9.6954],[-60.78353,9.19771],[-56.99529,9.19779],[-47.9765,9.9524],[-42.86326,12.01631],[-50.8124,18.02749],[-58.44564,23.11607],[-64.95751,26.90697],[-78.29988,33.87179],[-79.58917,34.91981],[-82.3681,35.33412],[-85.66704,35.1195],[-85.33579,32.8239],[-84.16444,32.23767],[-84.06937,31.97938],[-84.90661,30.77318],[-84.86832,30.16198],[-84.23152,30.11469],[-84.23066,29.40955],[-87.23482,21.65027],[-86.94646,21.1498],[-87.87206,19.72117],[-87.67285,19.51678],[-87.83826,18.67727],[-88.08794,18.9957],[-88.44779,18.46805],[-88.22828,18.16412],[-88.43627,16.70265],[-89.05946,15.92405],[-88.14178,15.54737],[-87.67836,15.78133],[-86.37944,15.63403],[-85.9709,15.88484],[-84.32828,15.70211],[-84.15962,15.24173],[-83.37412,15.0004],[-83.55597,14.83498],[-83.34138,14.32599],[-83.6301,13.75221],[-84.00291,11.27492],[-83.52079,10.31608],[-82.4842,9.33402],[-82.34004,8.90728],[-81.12965,8.65389],[-79.59681,9.45594],[-78.98718,9.40946],[-78.10952,9.11105],[-76.76261,7.78362]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":39260,"geometry":{"type":"Polygon","coordinates":[[[-72.09113999999994,41.39495000000005],[-72.09349999999995,41.394690000000026],[-72.09299999999996,41.38849000000005],[-72.08808999999997,41.38852000000003],[-72.09113999999994,41.39495000000005]]]},"properties":{"ESRI_OID":39260,"MSI_UID":39260,"ATU":1,"TITLE":"New London Harbor - Thames River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381565,"MRN":"urn:mrn:iala:wwy:us:navIV:dis1:seclonislsouexcecozon:seclonislsoutersea:seclonislsousublanact:bloislsouandgarbay:lonislsoueaspar:newlonhar:thariv","WATERWAY_NAME":"Thames River","CREATE_DATE":1773683838000,"MODIFIED_DATE":1773683848000,"BEGIN_DATE":1773619200000,"END_DATE":1777334399000,"DESCRIPTION":"General/MSIB\n\nFrom: 2026-04-26 To: 2026-04-27\nOn 22 April 2026, Naval Submarine Base New London will conduct a Black Start exercise resulting in a temporary loss of power to the charted Base Range that marks the center channel between the Gold Star Bridges and the south end of the installation. The affected aids include: \n\n•\tLLNR  - 21956 - Thames River Lower Range Front Light \n•\tLLNR – 21960 - Thames River Lower Range Rear Light\n\nBoth aids will be extinguished intermittently between 8:00am to 4:00pm local time as part of the scheduled exercise. A Broadcast Notice to Mariners will be issued on 21 April for additional visibility.\n\n\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-72.09114,41.39495],[-72.0935,41.39469],[-72.093,41.38849],[-72.08809,41.38852],[-72.09114,41.39495]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40014,"geometry":{"type":"Polygon","coordinates":[[[-80.68642999999997,28.726210000000037],[-80.67999999999995,28.718300000000056],[-80.66814999999997,28.704230000000052],[-80.65827999999993,28.690900000000056],[-80.64479999999998,28.67366000000004],[-80.63141999999993,28.655210000000068],[-80.61879999999996,28.636900000000026],[-80.60291999999998,28.618370000000027],[-80.58446999999995,28.597950000000026],[-80.57707999999997,28.58800000000008],[-80.57373999999999,28.579480000000046],[-80.56995999999998,28.56976000000003],[-80.56858999999997,28.56260000000003],[-80.56755999999996,28.551820000000077],[-80.56532999999996,28.542470000000037],[-80.56283999999994,28.533570000000054],[-80.55828999999994,28.522790000000043],[-80.55828999999994,28.521880000000067],[-80.55270999999993,28.50967000000003],[-80.55098999999996,28.506350000000054],[-80.54944999999998,28.504390000000058],[-80.54180999999994,28.48953000000006],[-80.53725999999995,28.479640000000074],[-80.52961999999997,28.466440000000034],[-80.52849999999995,28.465990000000033],[-80.52575999999993,28.45972000000006],[-80.52558999999997,28.457760000000064],[-80.52540999999997,28.453460000000064],[-80.52661999999998,28.450370000000078],[-80.52901999999995,28.449080000000038],[-80.53630999999996,28.44735000000003],[-80.53759999999994,28.447880000000055],[-80.54051999999996,28.447200000000066],[-80.56223999999997,28.43784000000005],[-80.56858999999997,28.433610000000044],[-80.57665999999995,28.42554000000007],[-80.58274999999998,28.416780000000074],[-80.58523999999994,28.411950000000047],[-80.55725999999999,28.40334000000007],[-80.54978999999997,28.414670000000058],[-80.54755999999998,28.41587000000004],[-80.54068999999998,28.41919000000007],[-80.53081999999995,28.42267000000004],[-80.52214999999995,28.424550000000067],[-80.51485999999994,28.426820000000077],[-80.51167999999996,28.428250000000048],[-80.50729999999999,28.431050000000027],[-80.50403999999997,28.434740000000033],[-80.50120999999996,28.438140000000033],[-80.49828999999994,28.443730000000073],[-80.49674999999996,28.449690000000032],[-80.49648999999994,28.45595000000003],[-80.49717999999996,28.462210000000027],[-80.49845999999997,28.468020000000024],[-80.50232999999997,28.475640000000055],[-80.51262999999994,28.493900000000053],[-80.51914999999997,28.506950000000074],[-80.52798999999999,28.522410000000036],[-80.53244999999998,28.53335000000004],[-80.53691999999995,28.549930000000074],[-80.54274999999996,28.578880000000026],[-80.54952999999995,28.59591000000006],[-80.55330999999995,28.60239000000007],[-80.56068999999997,28.612040000000036],[-80.57527999999996,28.628390000000024],[-80.59192999999993,28.646540000000073],[-80.60437999999994,28.66417000000007],[-80.62222999999994,28.68947000000003],[-80.65192999999994,28.72598000000005],[-80.68642999999997,28.726210000000037]]]},"properties":{"ESRI_OID":40014,"MSI_UID":40014,"ATU":7,"TITLE":"Sector Jacksonville, Territorial Sea - Sector Jacksonville, Submerged Land Act (SLA)/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116384317,"MRN":"urn:mrn:iala:wwy:us:navIV:dis7:secjacexcecozon:secjactersea:secjacsublanact","WATERWAY_NAME":"Sector Jacksonville, Submerged Land Act (SLA)","CREATE_DATE":1774534008000,"MODIFIED_DATE":1774534049000,"BEGIN_DATE":1774483200000,"END_DATE":1830297599000,"DESCRIPTION":"General/MSIB\n\n400014\n\nThe U.S. Space Force and Kennedy Space Center may choose to enforce a restricted area as specified in 33 CFR 334.525 and 33 CFR 334.595. Primarily beginning 2 hours prior to the scheduled launch window of any rocket launches. The restricted area would remain in effect until suspended by Space Launch Delta 45.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-80.68643,28.72621],[-80.68,28.7183],[-80.66815,28.70423],[-80.65828,28.6909],[-80.6448,28.67366],[-80.63142,28.65521],[-80.6188,28.6369],[-80.60292,28.61837],[-80.58447,28.59795],[-80.57708,28.588],[-80.57374,28.57948],[-80.56996,28.56976],[-80.56859,28.5626],[-80.56756,28.55182],[-80.56533,28.54247],[-80.56284,28.53357],[-80.55829,28.52279],[-80.55829,28.52188],[-80.55271,28.50967],[-80.55099,28.50635],[-80.54945,28.50439],[-80.54181,28.48953],[-80.53726,28.47964],[-80.52962,28.46644],[-80.5285,28.46599],[-80.52576,28.45972],[-80.52559,28.45776],[-80.52541,28.45346],[-80.52662,28.45037],[-80.52902,28.44908],[-80.53631,28.44735],[-80.5376,28.44788],[-80.54052,28.4472],[-80.56224,28.43784],[-80.56859,28.43361],[-80.57666,28.42554],[-80.58275,28.41678],[-80.58524,28.41195],[-80.55726,28.40334],[-80.54979,28.41467],[-80.54756,28.41587],[-80.54069,28.41919],[-80.53082,28.42267],[-80.52215,28.42455],[-80.51486,28.42682],[-80.51168,28.42825],[-80.5073,28.43105],[-80.50404,28.43474],[-80.50121,28.43814],[-80.49829,28.44373],[-80.49675,28.44969],[-80.49649,28.45595],[-80.49718,28.46221],[-80.49846,28.46802],[-80.50233,28.47564],[-80.51263,28.4939],[-80.51915,28.50695],[-80.52799,28.52241],[-80.53245,28.53335],[-80.53692,28.54993],[-80.54275,28.57888],[-80.54953,28.59591],[-80.55331,28.60239],[-80.56069,28.61204],[-80.57528,28.62839],[-80.59193,28.64654],[-80.60438,28.66417],[-80.62223,28.68947],[-80.65193,28.72598],[-80.68643,28.72621]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40108,"geometry":{"type":"Polygon","coordinates":[[[-76.35022999999995,36.885830000000055],[-76.35233999999997,36.885820000000024],[-76.35412999999994,36.88579000000004],[-76.35411999999997,36.88519000000008],[-76.35392999999993,36.88497000000007],[-76.35373999999996,36.88480000000004],[-76.35334999999998,36.88465000000008],[-76.35303999999996,36.88466000000005],[-76.35187999999994,36.884690000000035],[-76.35176999999999,36.88241000000005],[-76.35243999999994,36.88238000000007],[-76.35241999999994,36.88193000000007],[-76.35017999999997,36.88201000000004],[-76.35017999999997,36.881890000000055],[-76.35241999999994,36.881800000000055],[-76.35239999999999,36.88128000000006],[-76.35013999999995,36.881350000000054],[-76.35013999999995,36.88123000000007],[-76.35237999999998,36.88115000000005],[-76.35237999999998,36.88088000000005],[-76.35269999999997,36.88087000000007],[-76.35266999999999,36.88082000000003],[-76.35254999999995,36.88071000000008],[-76.35241999999994,36.88065000000006],[-76.35225999999994,36.88061000000005],[-76.35212999999999,36.88063000000005],[-76.35205999999994,36.88064000000003],[-76.35181999999998,36.88064000000003],[-76.34981999999997,36.88071000000008],[-76.34808999999996,36.880750000000035],[-76.34728999999999,36.88074000000006],[-76.34732999999994,36.881260000000054],[-76.34743999999995,36.88313000000005],[-76.35022999999995,36.885830000000055]]]},"properties":{"ESRI_OID":40108,"MSI_UID":40108,"ATU":5,"TITLE":"Apm Terminal Channel - Craney Island Creek/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116382765,"MRN":"urn:mrn:iala:wwy:us:navIV:dis5:secvirexcecozon:secvirtersea:secvirsublanact:checha:jamriv:eliriv:apmtercha:craislcre","WATERWAY_NAME":"Craney Island Creek","CREATE_DATE":1774618387000,"MODIFIED_DATE":1774620128000,"BEGIN_DATE":1774569600000,"END_DATE":1785542399000,"DESCRIPTION":"MSIB 037-26\n\nMarch 27, 2026\n\nFPCON BRAVO - Increased Security Measures\n\n\nSUMMARY: The Sector Virginia Captain of the Port (COTP) is implementing a 250-yard buffer zone from the shoreline extending waterward of USCG Sector Virginia and Base Portsmouth, located on the Eastern Branch of the Elizabeth River. \n\nENFORCEMENT: This 250-yard buffer zone will be enforced in accordance with 33 CFR 165.501(f) Control of vessels within the regulated navigation area:\n\n(1) When necessary to avoid hazard to vessel traffic, facility or port infrastructure, or the public, the Captain of the Port may prohibit entry into the regulated area, direct the movement of a vessel or vessels, or issue orders requiring vessels to anchor or moor in specific locations.\n(2) If needed for the maritime, commercial or safety and security interests of the United States, the Captain of the Port may direct a vessel or vessels to move from its current location to another location within the Regulated Navigation Area, or to leave the Regulated Navigation Area completely.\n(3) The master of a vessel within the Regulated Navigation Area shall comply with any orders or directions issued to the master's vessel by the Captain of the Port.\n\nThis MSIB applies to all mariners and vessels operating on the Elizabeth River in Craney Island Creek and the USCG Support Center Channel & Basin, adjacent to Coast Guard Base Portsmouth and Sector Virginia. Mariners are prohibited from entering, transiting, anchoring, or loitering within this 250-yard buffer without authorization from the COTP Virginia.\n\nCONTACT: For permission to enter the buffer zone, contact the Sector Virginia Command Center on VHF CH 16 or (877) 722-5727. Should you have any questions or concerns regarding this matter, contact United States Coast Guard Sector Virginia via email at VirginiaWaterways@uscg.mil. 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Mariners are advised to exercise caution due to the hazardous conditions associated with strong currents, increased drift, increased drafting toward bridge piers and severe outdrafts.  Mariners are advised to consider horsepower capability and tow size.  Fleet operators should regularly check their fleets and immediately report barge breakaways to the U.S. Coast Guard. 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Mariners are advised to transit the area with extreme caution. \"REGENT support boats are standing by on Ch 13/16.\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-71.37832,41.6666],[-71.40968,41.66283],[-71.40453,41.60518],[-71.40133,41.59594],[-71.43612,41.58259],[-71.43657,41.57848],[-71.41506,41.53258],[-71.39263,41.52778],[-71.38702,41.53875],[-71.38702,41.55451],[-71.37832,41.56804],[-71.37123,41.56906],[-71.36322,41.56649],[-71.3623,41.5468],[-71.36619,41.53858],[-71.36528,41.52778],[-71.34491,41.52864],[-71.32957,41.57574],[-71.33644,41.58156],[-71.33987,41.59902],[-71.32866,41.61905],[-71.33163,41.62965],[-71.3536,41.6353],[-71.36207,41.64984],[-71.36528,41.65941],[-71.37832,41.6666]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40441,"geometry":{"type":"Polygon","coordinates":[[[-80.69900999999999,40.155020000000036],[-80.70445999999998,40.14165000000003],[-80.70370999999994,40.14152000000007],[-80.69808999999998,40.15474000000006],[-80.69900999999999,40.155020000000036]]]},"properties":{"ESRI_OID":40441,"MSI_UID":40441,"ATU":2,"TITLE":"Lower Mississippi River - Ohio River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381306,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv:ohiriv","WATERWAY_NAME":"Ohio River","CREATE_DATE":1775133541000,"MODIFIED_DATE":1775133704000,"BEGIN_DATE":1775088000000,"END_DATE":1776988799000,"DESCRIPTION":"The U.S. Coast Guard COTP Pittsburgh has issued the following Safety Advisory due to high water/high flow conditions at Pike Island L/D, in the vicinity of Mile 84.2.  The gate opening at Pike Island L/D is greater than 50 feet.  Mariners are urged to exercise caution when transiting under the I-470 Bridge, in the vicinity of Mile 91.8, due to the strong set towards the LDB.  Mariners are urged to exercise caution while transiting under the CSX Railroad Bridge, in the vicinity of Mile 94.5, due to the limited horizontal clearance of 320 feet.  If pushing ahead, towing vessels are recommended to have a helper boat when transiting under the CSX Railroad Bridge, to ensure they maintain proper course and speed.  Mariners are urged to exercise caution when transiting the area.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-80.69901,40.15502],[-80.70446,40.14165],[-80.70371,40.14152],[-80.69809,40.15474],[-80.69901,40.15502]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40442,"geometry":{"type":"Polygon","coordinates":[[[-80.62944999999996,40.531660000000045],[-80.63023999999996,40.531420000000026],[-80.62514999999996,40.520620000000065],[-80.62457999999998,40.52072000000004],[-80.62944999999996,40.531660000000045]]]},"properties":{"ESRI_OID":40442,"MSI_UID":40442,"ATU":2,"TITLE":"Lower Mississippi River - Ohio River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381306,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv:ohiriv","WATERWAY_NAME":"Ohio River","CREATE_DATE":1775133694000,"MODIFIED_DATE":1775133768000,"BEGIN_DATE":1775088000000,"END_DATE":1777593599000,"DESCRIPTION":"The U.S. Coast Guard COTP Pittsburgh has issued a Safety Advisory due to high water/high flow conditions at New Cumberland Dam, vicinity of Mile 54.4.  The gate opening is greater than 50 feet.  Mariners are urged to exercise caution while transiting past Browns Island, between approximate Miles 60.5 and 64.0, due to the narrow channel, abundance of fleeting areas, river bends and reported fast currents in the area.  Mariners are urged to exercise extreme caution when transiting past Cables Eddy, between approximate Miles 64.5 and 65.5, due to the narrow channel and a sharp bend in the area.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-80.62945,40.53166],[-80.63024,40.53142],[-80.62515,40.52062],[-80.62458,40.52072],[-80.62945,40.53166]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40517,"geometry":{"type":"Polygon","coordinates":[[[-76.17911999999995,36.964440000000025],[-76.19027999999997,36.932750000000055],[-76.13894999999997,36.92411000000004],[-76.12933999999996,36.952510000000075],[-76.17911999999995,36.964440000000025]]]},"properties":{"ESRI_OID":40517,"MSI_UID":40517,"ATU":5,"TITLE":"Sector Virginia, Submerged Land Act (SLA) - Chesapeake Channel/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100117224627,"MRN":"urn:mrn:iala:wwy:us:navIV:dis5:secvirexcecozon:secvirtersea:secvirsublanact:checha","WATERWAY_NAME":"Chesapeake Channel","CREATE_DATE":1775220634000,"MODIFIED_DATE":1775220640000,"BEGIN_DATE":1775606400000,"END_DATE":1775865599000,"DESCRIPTION":"Mariners are advised of a dive operation in the vicinity of Anchorage C and Little Creek Harbor from Midnight to Noon on April 8 and April 9, 2026.  Surface assets may be contacted on VHF FM Channel 16 and 81A.  Mariners are requested to use caution when transiting the area.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-76.17912,36.96444],[-76.19028,36.93275],[-76.13895,36.92411],[-76.12934,36.95251],[-76.17912,36.96444]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40636,"geometry":{"type":"Polygon","coordinates":[[[-89.11970999999994,36.90002000000004],[-89.12320999999997,36.899770000000046],[-89.12298999999996,36.89103000000006],[-89.12018999999998,36.891320000000064],[-89.12018999999998,36.89561000000003],[-89.11970999999994,36.90002000000004]]]},"properties":{"ESRI_OID":40636,"MSI_UID":40636,"ATU":2,"TITLE":"New Orleans To Baton Rouge - Lower Mississippi River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100118284592,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv","WATERWAY_NAME":"Lower Mississippi River","CREATE_DATE":1775479811000,"MODIFIED_DATE":1775480512000,"BEGIN_DATE":1775433600000,"END_DATE":1777334399000,"DESCRIPTION":"The nun buoy has been reported off station, in the channel, in the vicinity of Mile 946.8.  Mariners are advised to transit the area with caution.\n\n","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-89.11971,36.90002],[-89.12321,36.89977],[-89.12299,36.89103],[-89.12019,36.89132],[-89.12019,36.89561],[-89.11971,36.90002]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}},{"type":"Feature","id":40850,"geometry":{"type":"Polygon","coordinates":[[[-85.63589999999994,38.37164000000007],[-85.63801999999998,38.37117000000006],[-85.63787999999994,38.362990000000025],[-85.64412999999996,38.34441000000004],[-85.65291999999994,38.32653000000005],[-85.66142999999994,38.31134000000003],[-85.67165999999997,38.301420000000064],[-85.69259999999997,38.28984000000003],[-85.73929999999996,38.26666000000006],[-85.74567999999994,38.26515000000006],[-85.76325999999995,38.26084000000003],[-85.76919999999996,38.26262000000003],[-85.77225999999996,38.26437000000004],[-85.78134999999997,38.27448000000004],[-85.78673999999995,38.277390000000025],[-85.78704999999997,38.27645000000007],[-85.78364999999997,38.27526000000006],[-85.77928999999995,38.27103000000005],[-85.77225999999996,38.264080000000035],[-85.76857999999999,38.26162000000005],[-85.76322999999996,38.260200000000054],[-85.75336999999996,38.26060000000007],[-85.73811999999998,38.264530000000036],[-85.67940999999996,38.29296000000005],[-85.66833999999994,38.29990000000004],[-85.65614999999997,38.31051000000008],[-85.64790999999997,38.32624000000004],[-85.64097999999996,38.34283000000005],[-85.63256999999999,38.362430000000074],[-85.63482999999997,38.36561000000006],[-85.63589999999994,38.37164000000007]]]},"properties":{"ESRI_OID":40850,"MSI_UID":40850,"ATU":2,"TITLE":"Lower Mississippi River - Ohio River/General/MSIB","STATUS":"Approved","MSI_GROUP":"General","SUB_CATEGORY":"MSIB","TYPE":null,"WTRW_UID":100116381306,"MRN":"urn:mrn:iala:wwy:us:navIV:dis8:secneworlexcecozon:secneworltersea:secneworlsublanact:soupas:heaofpastoneworl:neworlhar:neworltobatrou:lowmisriv:ohiriv","WATERWAY_NAME":"Ohio River","CREATE_DATE":1775738078000,"MODIFIED_DATE":1775738879000,"BEGIN_DATE":1775692800000,"END_DATE":1777593599000,"DESCRIPTION":"The Vessel Traffic Service (VTS) Louisville, Kentucky has been activated.  This system extends from Mile 593.0 to Mile 606.8 and will remain in effect while the McAlpine L/D, Upper Gauge reads 13.0 feet and above.  Operating procedures and instructions to mariners are described in Title 33 Code of Federal Regulations Part 161.  Mariners are urged to exercise caution in the area.","COORDINATES_JSON":"{\"type\":\"Polygon\",\"coordinates\":[[[-85.6359,38.37164],[-85.63802,38.37117],[-85.63788,38.36299],[-85.64413,38.34441],[-85.65292,38.32653],[-85.66143,38.31134],[-85.67166,38.30142],[-85.6926,38.28984],[-85.7393,38.26666],[-85.74568,38.26515],[-85.76326,38.26084],[-85.7692,38.26262],[-85.77226,38.26437],[-85.78135,38.27448],[-85.78674,38.27739],[-85.78705,38.27645],[-85.78365,38.27526],[-85.77929,38.27103],[-85.77226,38.26408],[-85.76858,38.26162],[-85.76323,38.2602],[-85.75337,38.2606],[-85.73812,38.26453],[-85.67941,38.29296],[-85.66834,38.2999],[-85.65615,38.31051],[-85.64791,38.32624],[-85.64098,38.34283],[-85.63257,38.36243],[-85.63483,38.36561],[-85.6359,38.37164]]]}","COORDINATES_TYPE":"Polygon","DECIMAL_LONGITUDE":null,"DECIMAL_LATITUDE":null}}]}