Navigation Center Logo
Skip Navigation Consolidated Nav Info | DGPS Advisories | GPS Advisories / NANUs | GPS Testing Notices | LNMs | Almanacs | Nav Rules| AIS | Contact Us | Search| Home
*** Special Notice Regarding LORAN Closure: *** In accordance with the DHS Appropriations Act, the U.S. Coast Guard will terminate the transmission of all U.S. LORAN-C signals effective 2000Z 08 Feb 2010. At that time, the U.S. LORAN-C signal will be unusable and permanently discontinued. This termination does not affect U.S. participation in the Russian American or Canadian LORAN-C chains. U.S. participation in these chains will continue temporarily in accordance with international agreements. You may read more and download pertinent documents via our LORAN-C page.
Maritime Telecomms
Primary Mission Areas:
Maritime Information:
HF DISTRESS AND SAFETY WATCHKEEPING SCHEDULE

 

HF Radiotelephone (Single Sideband) – Distress and Initial Contact

This schedule was effective 010001Z SEP 08

Authorized for the handling of Distress message traffic and initial contact with United States Coast Guard Long Range Communication facilities.

KHz SHIP STATION KHz COAST STATION NMF NMN NMA NMG
4125
4125
2300-1100Z
2300-1100Z
2300-1100Z
2300-1100Z
6215
6215
24 HRS
24 HRS
24 HRS
24 HRS
8291
8291
24 HRS
24 HRS
24 HRS
24 HRS
12290
12290
1100-2300Z
1100-2300Z
1100-2300Z
1100-2300Z

KHz SHIP STATION KHz COAST STATION Station and Schedule (UTC)
NMC NMO NOJ
4125 4125 24 HRS 0600-1800Z 24 HRS
6215 6215 24 HRS 24 HRS 24 HRS
8291 8291 24 HRS 24 HRS  
12290 12290 24 HRS 1800-0600Z  

KHz SHIP STATION KHz COAST STATION Station and Schedule (UTC)
Guam
6215
6215
0900-2100Z
12290
12290
2100-0900Z

Note: 8291 and 12290 KHz are available under NOJ upon request
Note: 16420 KHz is available at all stations upon request

HF Radiotelphone (single sideband) - Working Channels

These channels are available at all Coast Guard Long Range Communication Facilities for traffic handling purposes after initial contact is established on the HF Radiotelephone (Single Sideband) - Distress and Initial Contact frequencies.

ITU CHANNEL KHz SHIP STATION KHz COAST STATION
424
4134
4426
601
6200
6501
816
8240
8764
1205
12242
13089
1625
16432
17314

 

U.S. COAST GUARD COMMUNICATION STATIONS

Station SELCAL MARITIME MOBILE SERVICE IDENTITY
USCG Communications Area Master Station Atlantic, Chesapeake VA/NMN - 003669995
USCG Communications Area Master Station Atlantic, remotely keying
transmitters at Boston/NMF		 - 003669991
USCG Communications Area Master Station Atlantic, remotely keying
transmitters at Miami/NMA		 -- 003669997
USCG Communications Area Master Station Atlantic, remotely keying
transmitters at New Orleans/NMG		 -- 003669998
USCG Communications Area Master Station Pacific,
Pt. Reyes CA/NMC		 -- 003669990
USCG Communications Area Master Station Pacific, remotely keying
transmitters at Guam/NRV		 1096 --
USCG Communications Area Master Station Pacific, remotely keying
transmitters at Honolulu HI/NMO		 -- 003669993
USCG Communications Station Kodiak AK/NOJ - 003669899
USCG Marianas Section Guam -- 003669994

The SELCAL number is used for radiotelex (sitor). The Maritime Mobile Service Identity (MMSI) is used for digital selective calling and may also be used for radiotelex.

Note that except for the digital selective calling channels listed at the bottom of this page, the frequency channels described here are generally not Global Maritime Distress & Safety System (GMDSS) distress and safety channels. The Coast Guard does NOT monitor GMDSS radiotelephone or radiotelex channels.

HF RADIOTELEX (SITOR OR NARROW BAND DIRECT PRINTING)

The U.S. Coast Guard high frequency (SITOR) AMVER and OBS service was
discontinued from all locations (NMC, NMN, NMO, NOJ) except NRV/Guam
on 30 Sep 2008...Read more.

NMC - Pt. Reyes CA, using Guam remote transmitter/receiver control (NRV)
ITU CHANNEL KHz COAST STATION KHz SHIP STATION Schedule (UTC)
412 4215.5 4178 On request
612 6319.5 6268.5 On request
812 8422 8382 24 HRS
1212 12585 12482.5 1200Z-2200Z
1612 16812.5 16689 24 HRS
2212 22382 22290 2200Z -1200Z

RADIOTELEX SERVICES AVAILABLE

COMMAND EXPLANATION RESPONSE
OBS+ WEATHER OBSERVATION (message must be in standard format) MOM11+ MSG+
AMV+ AMVER MESSAGE (message must be in standard format) MOM01+ MSG+
MED+ MEDICAL EMERGENCIES (signals an alarm at the coast station) MOM07+ MSG+
URG+ SHIPBOARD DISTRESS/EMERGENCY (signals an alarm at the coast station) MOM20+ MSG+
TFC+ MISCELLANEOUS ROUTINE MESSAGES MOM16+ MSG+
VES+ U.S. FISHERIES, POLLUTION OR OTHER REQUIRED VESSEL REPORT MOM13+ MSG+
PLD+ PLEAD REQUEST TO PACIFIC MISSLE RANGE PT MUGU MOM19+MSG+
OPR+ OPERATOR ASSISTANCE  
FREQ+ FREQUENCY GUARD SCHEDULE LIST  
MSG+ DOWNLOADS SHORE-TO-SHIP MESSAGES (limited to government vessels)  
BRK+ BREAK OFF COMMUNICATIONS  
HELP+ LIST OF AVAILABLE COMMANDS  

HF DIGITAL SELECTIVE CALLING

Portsmouth/NMN, Boston/NMF, Miami/NMA, New Orleans/NMG, Pt. Reyes/NMC, Honolulu HI/NMO, Kodiak AK/NOJ

2187.5 kHz Coast Guard will normally respond to DSC test calls if acknowledgment is requested.  Reports of uncancelled or unacknowledged inadvertently transmitted distress calls will be forwarded to the Federal Communications Commission.
4207.5
6312
8414.5
12577
16804.5
Note: For radiotelex and digital selective calling, frequencies listed are assigned. Carrier frequency is located 1700Hz below the assigned frequency.
 
U.S. Coast Guard Navigation Center, NAVCEN MS7310, 7323 Telegraph Road, Alexandria, VA 20598-7310 | (703) 313-5900