User manual

Chapter 2: Operation

26 DSC calls

channel for the following communicationIn the field CAT: select a DSC

call category, depending on the call type.

4. In the field TO: enter the 9-digit MMSI number of the vessel you want

to contact or use the phone book (PHBOOK) to select a contact.

5. In the field CH: enter the suggested VHF channel for following

communication.

6. Press the soft key SEND to make the call.

What is a Session?

A DSC session is defined as a collection of DSC calls (transmitted and/or

received) that are related to the same event (e.g. a distress event) or

established call (e.g. an individual call request followed by an

acknowledgement).

A session can be either active or on hold. The active session has control

over the radio transmitter. A session can have a purpose. For example if the

purpose is to establish a communication on a working channel.

The non-DSC VHF communication is considered as a session that can be

active (engaged) or on hold (dis-engaged). See also Engagement status on

page 16.

DSC call

type

Cat. To: Ch.

Session

icon

DSC call