Section 5 - Sending And Receiving Dsc Calls (Us Only); What Is Dsc; Maritime Mobile Service Identity - Simrad HH33E Manual

Section 5 - Sending and Receiving DSC Calls (US only)

5-1 What is DSC?

DSC (Digital Selective Calling) is a semi-automated method of establishing VHF, MF, and
HF
radio calls. It has been designated as an international standard by the IMO (International
Maritime
Organization) and is part of the GMDSS (Global Maritime Distress and Safety System).
Currently, you are required to monitor Distress Channel 16, but DSC will eventually
replace
listening watches on distress frequencies and will be used to broadcast routine and
urgent
maritime safety information.
DSC enables you to send and receive calls from any vessel or coast station that is
equipped
with DSC functionality and within geographic range. Calls can be categorised as distress,
urgency, safety, or routine, and DSC selects a working channel automatically.
Due to EU regulations, DSC is not available in the HH33E (EU) model.

5-1-1 Maritime Mobile Service Identity

An MMSI is a nine-digit number used on Marine Transceiver capable of using Digital
Selective Calling (DSC). This number is used like a telephone number to selectively call
other vessels.
CAUTION
Simrad - HH33 Installation and Operation Instructions 47