COMMANDANT INSTRUCTION M16672.2D NAVIGATION RULES: INTERNATIONAL INLAND
Commandant Instruction M16672.2D, produced and published by the U.S. Coast Guard Navigation Standards Branch, U.S. Coast Guard Headquarters, Washington, DC 20593 on March 25th, 1999 (published version, ISBN: 0-16-050057-5, pdf, 1.3MB), is a compendium of the:
It is available in printed form at the:
International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS) (33 U.S.C. 1601-1608);
COLREGS Demarcation Lines (33 CFR 80);
Inland Navigation Rules (33 CFR 83),
their respective technical annexes (33 CFR 84-90);
Vessel Bridge-to-Bridge Radiotelephone Regulations, (33 CFR 26); and,
various other U.S.legal provisions contained in Title 33 and 46 U.S. Code and Code of Federal Regulations (CFR) regarding compliance and penalties associated with the Navigation Rules.
RECORD OF CHANGES of all post-publication editorial corrections and changes due to amendments (i.e. IMO Resolution A.910(22) and A.1004(25)) to the 72 COLREGS or pertinent sections of the CFR−are denoted in bold-type below:
On Page i, replace Record of Changes page with the this one.
On page vi, LEGAL CITATIONS, at Inland Navigation Rules Act of 1980, amend ‘33 U.S.C 2001-2038’ to ’33 CFR 83’ (see 75 FR 19546).
On page 2, INTERNATIONAL Rule 1(c), insert the word "or" after "convoy," and in Footnote 1 correct "Part 707" to read "Part 706" and "(32 CFR 707)" to "(32 CFR 706)".
On page 6, INTERNATIONAL Rule 3(a) is amended to read as follows:
(a) The word "vessel" includes every description of water craft, including nondisplacement craft, WIG craft and seaplanes, used or capable of being used as a means of transportation on water.
On page 8, INTERNATIONAL Rule 3(m) is added as follows:
(m) The term "Wing-In-Ground (WIG) craft" means a multimodal craft which, in its main operational mode, flies in close proximity to the surface by utilizing surface-effect action.
On page 18, INTERNATIONAL Rule 8(a) is amended to read as follows:
(a) Any action to avoid collision shall be taken in accordance with the Rules of this Part and shall, if the circumstances of the case admit, be positive, made in ample time and with due regard to the observance of good seamanship.
On page 28, INTERNATIONAL-INLAND Rule 13, insert a paragraph break between (c) and (d).
On page 34, INTERNATIONAL Rule 18(f) is added as follows:
(i) A WIG craft shall, when taking off, landing and in flight near the surface, keep well clear of all other vessels and avoid impeding their navigation;
(ii) a WIG craft operating on the water surface shall comply with the Rules of this Part as a power-driven vessel.
On page 48, INTERNATIONAL Rule 23(c) is added as follows, and the old Rule 23(c) is renumbered as 23(d):
(c) A WIG craft only when taking off, landing and in flight near the surface shall, in addition to the lights prescribed in paragraph (a) of this Rule, exhibit a high intensity all-round flashing red light.
On page 58, INTERNATIONAL Rule 24(d): Change "Rule 23(a)(i)" to "Rule 23(a)(ii)".
On page 112, INTERNATIONAL Rule 31 is amended to read as follows:
Where it is impracticable for a seaplane or a WIG craft to exhibit lights and shapes of the characteristics or in the positions prescribed in the Rules of this Part she shall exhibit lights and shapes as closely similar in characteristics and position as is possible.
On page 114, INTERNATIONAL Rule 33(a) is amended to read as follows:
On page 122, INTERNATIONAL Rule 35(i) is added as follows and the old Rule 35(i) and (j) are renumbered as 35(j) and (k), respectively:
(a) A vessel of 12 meters or more in length shall be provided with a whistle, a vessel of 20 meters or more in length shall be provided with a bell in addition to a whistle, and a vessel of 100 meters or more in length shall, in addition, be provided with a gong, the tone and sound of which cannot be confused with that of the bell. The whistle, bell, and gong shall comply with the specifications in Annex III to these Regulations. The bell or gong or both may be replaced by other equipment having the same respective sound characteristics, provided that manual sounding of the required signals shall always be possible.
[Please note that the bell is no longer required on a vessel 12 meters or more but less than 20 meters in length].
On page 134, INTERNATIONAL Annex I, Section 2(d), amend "prescribed in Rule 23(c)(i)" to read "prescribed in Rule 23(d)(i)" [due to the added Rule 23(c)].
(i) A vessel of 12 meters or more but less than 20 meters in length shall not be obliged to give the bell signals prescribed in paragraphs (g) and (h) of this Rule. However, if she does not, she shall make some other efficient sound signal at intervals of not more than 2 minutes.
On page 137, INLAND Annex I,§ 84.05(d), Second sentence, correct "exhibit on" to "exhibit one"
On page 145, INLAND Annex I, § 84.17, in Note to paragraph (c), correct "1.28 meters appart" to "1.28 meters apart".
On page 148, INTERNATIONAL Annex I, Section 13 is amended to read as follows:
13. High-speed craft*
(a) The masthead light of high-speed craft may be placed at a height related to the breadth of the craft lower than that prescribed in paragraph 2(a)(i) of this annex, provided that the base angle of the isosceles triangles formed by the sidelights and masthead light, when seen in end elevation, is not less than 27 degrees.
[The words "with a length to breadth ratio of less than 3.0" were removed].
(b) On high-speed craft of 50 meters or more in length, the vertical separation between foremast and mainmast light of 4.5 meters required by paragraph 29a)(ii) of this annex may be modified provided that such distance shall not be less than the value determined by the following formula:
y is the height of the mainmast light above the foremast light in meters;
a is the height of the foremast light above the water surface in service condition in meters;
Y is the trim in service condition in degrees;
C is the horizontal separation of masthead lights in meters.
* Refer to the International Code of Safety for High-Speed Craft, 1994 and the International Code of Safety for High-Speed Craft, 2000.
On page 150, INTERNATIONAL Annex II, Section 2(a) and (b), correct "may exhibit" to "shall exhibit".
On pages 152-155, INTERNATIONAL Annex III, Section 1, paragraphs (a) and (c) are amended to read as follows:
On page 160, INTERNATIONAL Annex III, section 2, paragraph (b) is amended to read as follows:
(a) Frequencies and range audibility
The fundamental frequency of the signal shall lie within the range 70-700Hz. The range of audibility of the signal from a whistle shall be determined by those frequencies, which may include the fundamental and/or one or more higher frequencies, which lie within the range 180-700Hz (+/-1%) for a vessel of 20 meters or more in length, or 180-2100Hz (+/-1%) for a vessel of less than 20 meters in length and which provide the sound pressure levels specified in paragraph 1(c) below.
(c) Sound signal intensity and range of audibility
A whistle fitted in a vessel shall provide, in the direction of maximum intensity of the whistle and at a distance of 1 meter from it, a sound pressure level in at least one 1/3rd-octave band within the range of frequencies 180-700Hz (+/-1%) for a vessel of 20 meters or more in length, or 180-2100Hz (+/-1%) for a vessel of less than 20 meters in length, of not less than the appropriate figure given in the table below.
Length of vessel in meters
1/3rd-octave band level at 1 meter in dB referred to 2X10-5N/m2
Audibility range in nautical miles
200 or more
75 but less than 200
20 but less than 75
Less than 20
*1 When the measured frequencies lie within the range 180-450Hz
*2 When the measured frequencies lie within the range 450-800Hz
*3 When the measured frequencies lie within the range 800-2100Hz
(b) Bells and gongs shall be made of corrosion-resistant material and designed to give clear tone. The diameter of the mouth of the bell shall be not less than 300 mm for vessels of 20 meters or more in length. Where practicable, a power-driven bell striker is recommended to ensure constant force but manual operation shall be possible. The mass of the striker shall be not less than 3 per cent of the mass of the bell.
[The words "and shall be not less than 200 mm for vessels of 12 meters or more but of less than 20 meters in length" were removed].
On page 162, ANNEX IV - DISTRESS SIGNALS (see IMO Resolution A.1004(25)), amend sub-paragraphs 1.(l) and 1.(m) to read as follows:
(l) a distress alert by means of digital selective calling (DSC) transmitted on
(i) VHF channel 70, or
(ii) MF/HF on the frequencies 2187.5 kHz, 8414.5 kHz, 4207.5 kHz, 6312 kHz, 12577 kHz or 16804.5 kHz;
(m) a ship-to-shore distress alert transmitted by the ship’s Inmarsat or other mobile satellite service provider ship earth station; In paragraph 3, add 'Annex III' after the Merchant Ship Search and Rescue Manual.
On page 187, PART 80 - COLREGS DEMARCATIONS LINES (see 72 FR 35013), amend § 80.738(b), to read as follows:
(b) A line drawn from Puerto San Juan Light to position 18'28'30" N, 066'08'24" W, at the northwest extent of Isla de Cabras across the entrance of San Juan Harbor.
On pages 207-208, WATERS SPECIFIED BY THE SECRETARY, at 33 CFR 89.27(b)(1) correct "Dupont Fixed Badge" to "Dupont Fixed Bridge", and, at 33 CFR 89.27(b)(11) correct "Christl" to "Christi".
On page 208, VESSEL BRIDGE-TO-BRIDGE RADIOTELEPHONE REGULATIONS: (see 68 FR 42601 and 60 FR 39364), correct the introductory paragraph to read as follows:
The Vessel Bridge-to-Bridge Radiotelephone Act is applicable on the navigable waters of the United States (see 33 CFR §2) which include internal waters that are subject to tidal influence, those not subject to tidal influence but that are used or are determined to be capable of being used for substantial interstate or foreign commerce, and, the territorial sea (the waters 12 nautical miles wide, adjacent to the coast of the United States and seaward of the territorial sea baseline…).
At 33 CFR § 26.02, correct quotation mark (") after "Towing Vessel” and between "Power-driven Vessel" and "Towing Vessel" insert:
Territorial sea ”means all waters as defined in §2.22(a)(1) of this chapter;"
At 33 CFR § 26.03(f), amend “Table 26.03(f)” to read "Table 161.12(c)".
All corrected pages to USCG COMMANDANT INSTRUCTION M16672.2D, NAVIGATION RULES (International-Inland).
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