USCG District 14, Hawaii/Guam

District 14 Website

UHF and GMRS Frequencies

Name           Frequency           Notes
White Dot     465.575 MHz        GMRS
Black Dot     462.625 MHz        GMRS
Orange Dot   462.675 MHz        GMRS
Brown Dot    464.500 MHz        Itinerant
Yellow Dot    464.550 MHz        Itinerant
Silver Star    467.850 MHz
Gold Star     467.875 MHz  
Red Star      467.900 MHz
Blue Star     467.925 MHz
                       469.500 MHz
                       469.550 MHz


GMRS is licensed 15 channels ( 1 - 7 & 15 - 22 ) limited to 50 watts with FM voice. GMRS requires a no-test license, obtainable with an application and fee. GRMS can provide greater base to mobile range with far less interference then CB and FRS. The costs may be higher but a base station with external antenna and repeaters are allowed with GRMS. Unless you plan to use a higher powered base station or repeater I see no reason to obtain a GMRS license.

Citizens' Band Radio 

Citizens' Band radio (often shortened to CB radio) is a system of short-distance radio communications between individuals on a selection of 40 channels within the 27-MHz (11 m) band. The CB radio service is distinct from FRS, GMRS, MURS, or amateur ("ham") radio.  CB does not require a license in the United States and, unlike amateur radio, it may be used for business as well as personal communications. Like many other two-way radio services, Citizens' Band channels are shared by many users.

CITIZENS BAND: ( CB ) Unlicensed 40 channels limited to 4 watts for AM or 12 watts for SSB voice modulation. If you decide to use CB install a good base station antenna. Every vehicle used during a disaster should be equipped with a CB radio. A good base station has a range of 10 miles or more. A big disadvantage of CB is interference and lack of security.

CB could be used to communicate with nearby sites or groups. Every site monitors the national emergency channel 9 ( 27.065 MHz ). Place a call on channel 9 using tactical call signs or handles. If the conversation lasts longer than a few seconds move to another [pre-arranged] channel. When the call is finished all sites return to monitoring channel nine.

CB Radio Channels (FCC)

Channel FrequencyChannel FrequencyChannel FrequencyChannel Frequency
126.965 MHz1127.085 MHz2127.215 MHz3127.315 MHz
226.975 MHz1227.105 MHz2227.225 MHz3227.325 MHz
326.985 MHz1327.115 MHz2327.255 MHz3327.335 MHz
427.005 MHz1427.125 MHz2427.235 MHz3427.345 MHz
527.015 MHz1527.135 MHz2527.245 MHz3527.355 MHz
627.025 MHz1627.155 MHz2627.265 MHz3627.365 MHz
727.035 MHz1727.165 MHz2727.275 MHz3727.375 MHz
827.055 MHz1827.175 MHz2827.285 MHz3827.385 MHz
927.065 MHz1927.185 MHz2927.295 MHz3927.395 MHz
1027.075 MHz2027.205 MHz3027.305 MHz4027.405 MHz

The maximum legal CB power output level, in the U.S., is four watts for AM and 12 watts (peak envelope power or "PEP") for SSB, as measured at the antenna connection on the back of the radio. However, illegal external linear amplifiers are frequently used. In the 1970s the FCC banned the sale of linear amplifiers capable of operation from 24 to 35 MHz to discourage their use on the CB band, though the use of high power amplifiers by lawless pirate operators continued. Late in 2006 the FCC amended the regulation to only exclude 26 to 28 MHz. Extremely lax enforcement of these regulations by the FCC has led to manufacturers of illegal linear amplifiers openly advertising their products for sale, and many CB dealers carry these and other amplifiers in their product lines and include them in catalogs.

Rules and regulations for CB operations can be found here.  

Marine VHF Radio

Operating procedure

The accepted conventions for use of marine radio are collectively termed "proper operating procedure." These conventions include:

  • Listening for 2 minutes before transmitting

  • Using Channel 16 only to establish communication (if necessary) and then switch to a different channel

  • using a set of international "calling" procedures such as the "Mayday" distress call, the "Pan-pan" urgency call and "Securité" navigational hazard call.

  • using "pro-words" based on the English language such as Acknowledge, All after, All before, All stations, Confirm, Correct, Correction, In figures, In letters, Over, Out, Radio check, Read back, Received, Repeat, Say again, Spell, Standby, Station calling, This is, Wait, Word after, Word before, Wrong

  • using the NATO phonetic alphabet: Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliet, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-ray, Yankee, Zulu

  • using a phonetic numbering system based on the English language: Wun, Too, Tree, Fow-er, Fife, Six, Sev-en, Ait, Nin-er, Zero, Decimal

Slightly adjusted regulations can apply for inland shipping, such as the Basle rules in Western Europe.

Marine VHF radio is sometimes illegally operated inland. Since enforcement is often the job of the local coast guard, enforcement away from the water is sometimes difficult.

Hawaii Marine Radio Frequencies

Aloha Tower/Marine Traffic Control:
Channel 12    (156.60 MHz)

Intl. Hailing & Emergency Frequency:
Channel 16    (156.800 MHz)

NOAA Weather Radio Network: 
(Hilo, Honolulu): 162.550 MHz
(All other areas):  162.400 MHz

High-Frequency (HF) Single Sideband: 
7080 kHz

Coast Guard Medium-Frequency  (MF) Sideband:
2670 kHz

Citizens Band (CB) Radio:
Channels 9 and 23

Emergency Assistance and Vital Services Numbers:

Hyperbaric Treatment Center - Bends Treatment
(Oahu) 24-Hrs   587-3425

Oil and Hazardous Material Spills
Coast Guard   (Oahu)    522-8260
    24-Hrs.  927-0830
National Response Center
   Toll Free   1-800-424-8802

Chemical & Oil Spill Reporting
Dept. of Health (Oahu)   586-4249
     After Hours   247-2191

Time Tick
(WWVH Coordinated Universal Time) 471-6363

Harbor Police Dispatch:
Oahu   587-2076
Kauai   245-6996
Maui   877-5713

Marine Emergencies/Search & Rescue
Nearshore 0-3 miles (fire rescue)   911
Offshore 3-200 miles (Coast Guard)   1-800-552-6458
Offshore 200+ miles (Coast Guard)   1-800-331-6176
Coast Guard Toll-free cellular phone:   *USCG (*8724)

Civil Defense

Oahu  523-4121
Maui    243-7285
Hawaii   935-0031
Kauai   241-6336

Marine VHF Channels and Frequencies

Channel NumberFrequencies (MHz) 
Ⓐ Usually ship stationsⒷ Usually coast stationsUnited States
3156.150160.750Ⓐ Illegal for Pulbic Use
9156.450161.050Calling Ⓐ, Commerical and non-commercial.
13156.650161.250ridge-to-Bridge safety : Vessels > 20m must maintain watch, Tx limited to 1 watt.
16156.800161.400International distress, safety and calling               USA: All vessels equipped with VHF must maintain watch.
21157.050161.650 U.S. Coast Guard Only
22157.100161.700 U.S. Coast Guard Only-Public working channel 2
23157.150161.750 U.S. Coast Guard Only
61156.075160.675 Illegal for Pulbic Use
64156.225160.825 Illegal for Pulbic Use
72156.625161.225Non-Commercial ship-to-ship 
81157.075161.675Ⓐ U.S. Government Use Only
82157.125161.725Ⓐ U.S. Government Use Only
83157.175161.775Ⓐ U.S. Government Use Only
87157.375161.975Automatic Identification System 
88157.425162.025Automatic Identification System 
A portable VHF which is both ip67, GMDSS and ATEX approved.

A VHF set and a VHF channel 70 DSC set, the DSC on top, both produced by Sailor

More on Coast Guard Frequencies

USCG Site for Marine Frequencies

Maritime Information (Navigation Center - NAVCEN)