Receiving An All Ships Call; Receiving An Individual Call - Raytheon TRP 1150 Operation Manual

Receiving an All Ships Call

DSC on distress calling frequencies are used by coast stations to advise shipping and by
ships to advise coast stations and other ships of a following urgency or safety message.
Reception of a safety call addressed to all ships is indicated by a sound signal of 3 seconds
duration and a Call lamp that flashes until the call is acted upon. The call alarm sound level
setting can be changed, see the Function Menu.
If VIEW is pressed:
CONNECT is shown if SSB telephony and a legal frequency are indicated in the call and
disappears 5 minutes after receipt of the call.
Ships receiving a DSC call to all ships shall not acknowledge the receipt of the call but
should set the receiver to the radiotelephony frequency indicated in the call and listen to the
urgency or safety message.

Receiving an Individual Call

When the transceiver is not used for traffic, scanning should be activated to keep watch on
one or more DSC frequencies used for public correspondence and general ship-to-ship
communication.
Reception of an individual routine call addressed to the ship is indicated by a flashing Call
lamp and a sound signal which continues until the call is acted upon. The call alarm sound
level setting can be changed, see the Function Menu.
The call should be answered by sending a DSC Acknowledgement within 4½ minutes.
LIFT HANDSET TO ACKNOWLEDGE and ACK is shown if SSB telephony and legal
frequencies are indicated in the call. Lifting the handset or pressing the softkey in this case
0131
Displays the contents of the call
Press CONNECT to set receiver to the
frequency indicated in the call
Returns to previous telephony display
Press CONNECT to set receiver to the
frequency indicated in the call
Selects older call
Returns to previous telephony display
Returns to previous telephony display
Displays the contents of the call
Press ACK or lift handset
Stops alarm sound
11