Both category A and D radios can send and receive digitally encoded distress calls on channel 70, which is reserved exclusively for digital communications. Category A radios, however have two separate receivers, with one constantly tuned to channel 70. Category A radios are therefore more flexible and capable of delivering advanced communication capabilities.With the press of a button, all DSC equipped VHF radios can send a distress call in digital form on channel 70. The call, sent in much less than one second, includes your unique identification number (MMSI) and if the radio is connected to a GPS or Loran C, the precise location of your boat. The distress call will continue to be sent until it is answered by another station. The station hearing the call will likely call your radio on channel 16 or, in the case of the Coast Guard on 22A and begin the process of bringing you the help you need. Having a highly automatic way of making your need for assistance known has obvious advantages.

How do i activate my radio

Go to https://www.boatus.com/MMSI/MMSI/Home and register for an MMSI number. Once the MMSI number has been obtained it must be entered into the radio. Push the "CALL/SET" to enter the DSC menu then look for the MMSI entry option. Follow the prompts.

Item Weight	2.6 Pounds
Item Dimensions D x W x H	9.25"D x 12.21"W x 2.95"H
Color	White
Waterproof Rating	IP67
Compatible Devices	VHF-enabled marine devices
Talking Range Maximum	25 Mile
Tuner Type	VHF
Water Resistance Level	Water Resistant
Number of Channels	40
Special Features	External Speaker Jack, Signal Strength Meter, LCD Screen, Submersible, Illuminated Function Keys
Frequency Range	156-174 MHz

COBRA MR F45-D WHITE VHF FIXED CLASS D SUBMERSIBLE VHF RADIO

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