Raymarine TH-Series Specifications download pdf (Page 74)

RAYMARINE VHF

COMMUNICATIONS. PEACE OF

MIND IS CLOSE AT HAND.

Raymarine's communications systems combine innovative, state-of-

the-art technology with rugged waterproof construction, designed

to withstand life at sea. Select the right radio for your boat – single

or multi-station VHFs, Class D DSC (Digital Selective Calling) with

SeaTalk and NMEA connectivity. Whether blue water cruising or

ﬁshing inshore, Raymarine has what you need for communication

safety at sea.

What is Digital Selective Calling? Digital Selective Calling

(DSC) is a global protocol that uses channel 70 (156.525 MHz) to

transmit and receive digital messages. It works on DSC equipped

VHF radios and is used for individual, ‘all ships’ and distress calls.

DSC also enables you to selectively alert single or multiple boaters

of incoming VHF calls by using stored MMSI (Maritime Mobile

Service Identiﬁcation) numbers, similar to making a phone call.

You can also 'poll' another boat to obtain its GPS position and

display it on a Raymarine multifunction display.

DSC safety digital Mayday. If you are unfortunate enough

to ﬁnd yourself having to make a mayday call, the last thing you

need is extra complication. Making a DSC distress call is simple

with Raymarine’s DSC equipped VHFs. Just press the button,

clearly marked in the back of the handset or front panel of the

radio, and GPS position and time information are transmitted in a

digital ‘packet’ complete with the vessel’s Maritime Mobile Service

Identiﬁcation (MMSI) telling other ships and shore stations exactly

where you are and that you are in a distress situation. This simple

procedure can dramatically increase your chance of a successful

rescue compared to a traditional Mayday voice call.

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Raymarine TH-Series Specifications Page 74