Chapter 2: Operation
30 DSC calls
The session line can be one of the following:
The session status can be one of the following:
Session line Explanation
OWN DISTRESS The ship is in own distress. See also To send a
distress message on page 21.
DISTRESS RX You watch or participate in a distress
communication for another station in distress
RELAY calls (numerous) You watch or participate in a distress
communication for another station in distress
ALL SHIPS TX/RX You have sent / received an all ships call
GROUP TX/RX You have sent / received a group call
INDIVIDUAL TX/RX You have either sent a call request to a station to
establish contact, or another station has made a call
to you to establish contact. The call needs a reply.
TEST TX/RX You either have sent a SAFETY TEST call or have
received a SAFETY TEST call from another station
that needs to be replied.
POSITION TX/RX A position request was either sent or received.
Session status Explanation
WAIT FOR
ACKNOWLEDGE
You made an individual call to a station and are
awaiting a reply to establish connection.
OCCUPIED The DSC transmission mechanism waits until the DSC
channel (70) is free.
TRANSMITTING Transmission of a DSC message is ongoing.
IN COMMUNICATION
WITH
The communication has been established in a
routine call.
ACKNOWLEDGED The call requiring (or not requiring) an
acknowledgement has been acknowledged.