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Maritime Telecommunications
Maritime Telecommunications
Automatic Identification Systems (AIS)
GMDSS
CG National Distress System
Digital Selective Calling
HF Distress Frequencies
U.S. VHF Channels & Freq
International VHF Channels and Frequencies
Electrotechnical Commission
MF & HF Channels
International Maritime Organization
Marine Safety Broadcasts
Maritime Mobile Service IDs
Radio Info For Boaters
Radio Watch Requirements
Reference Information
Primary Mission Areas:
Nationwide DGPS
Long Range Identification and Tracking
Nationwide AIS (NAIS)
Local Notice to Mariners
Light Lists
Civil GPS Service Interface Committee
Global Positioning System
Electronic Navigation & Charting
LORAN C (archive)
Services & Reporting:
Receive Free LNM Updates
Receive Free GPS Status Messages
Receive NANU Updates
Join CGSIC (free)
Report an ATON Discrepancy or Outage
Report a GPS Problem
Report an NDGPS Problem
Report an LRIT Problem
Report an NAIS Problem
Contact Us
Maritime Information:
USCG 'Homeport' Website
Maritime Telecommunications
CG Nat'l Distress System
Global Maritime Distress and Safety System
Marine Safety Information Broadcasts
MF & HF Channels
Nav Pubs and Documents
Radio Watch Requirements
Vessel Traffic Services
VHF Channels & Freqs
8 MHz Duplex Channels
ITU Channel No.
Coast Transmit
(kHz)
Ship Transmit
(kHz)
801
8719
8195
802
8722
8198
803
8725
8201
804
8728
8204
805
8731
8207
806
8734
8210
807
8737
8213
808
8740
8216
809
8743
8219
810
8746
8222
811
8749
8225
812
8752
8228
813
8755
8231
814
8758
8234
815
8761
8237
816
8764
8240
(USCG Calling)
817
8767
8243
818
8770
8246
819
8773
8249
820
8776
8252
821
8779
8255
(Calling)
822
8782
8258
823
8785
8261
824
8788
8264
825
8791
8267
826
8794
8270
827
8797
8273
828
8800
8276
829
8803
8279
830
8806
8282
831
8809
8285
832
8812
8288
833
8291
8291
834
8707
(varies)
835
8710
(varies)
836
8713
(varies)
837
8716
(varies)
