Listening For Calls; Making A Telephone Call; Scanning - Raytheon TRP 1150 Operation Manual

Listening for Calls

Coast stations transmit traffic lists consisting of call signs/names of the ships for which they
have traffic.
The traffic lists are sent at specified times and at intervals of typically two hours. They are
broadcasted on the normal working frequencies on the coast station. Ships should, as far as
possible, listen to the traffic lists transmitted by relevant coast stations. On hearing their call
sign they should establish communication as soon as they can do so.
1. Select the appropriate station.
2. Select the channel on which traffic lists are transmitted.
3. Switch loudspeaker on and adjust volume to an appropriate level.
If on HF, traffic lists are transmitted in more frequency bands simultaneously, search for the
channel with the best propagation conditions.

Making a Telephone Call

Wait until transmission of the traffic list has finished and the channel is free. Call the coast
station on the working frequency on which the traffic list was received or as instructed by the
coast station.
1. Hook off the handset.
2. Press the PTT key on the handset when speaking.
Say:
1. <Called station's name (3 times)>
2. 'This is' <Your ship's name (3 times)>
3. 'Over'
3. Release the PTT key to listen.
4. When answered:
Follow the instructions from the coast station. The coast station may ask for further identifica-
tion, information on position and next port of call, and may suggest another working channel
for the traffic to follow. If the coast station is not ready to receive traffic immediately it may
ask you to wait for a specific number of minutes.

Scanning

Starts/Stops scanning.
The last used scanning type is selected and squelch is set to on when scanning is activated.
Speaker is set to on if the scanning type is Dual Watch, Multi Watch, or Telephony Watch.
Scanning is stopped by pressing SCAN or ENTER or by lifting the handset off hook. For
Multi Watch or Telephony Watch scanning stops on the presently scanned telephony
channel, for Dual Watch and DSC Watch the previous telephony setting is restored. Scan-
ning resumes when the handset is placed on hook again.
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