Voice Call Operation; Operating Mf/Hf Radio Communication; Listening For Calls From A Coast Station - Sailor System 5000 MF/HF User Manual

3 Voice call operation

3.1

Operating MF/HF radio communication

The MF/HF is operated by means of a handset.
To bring the MF/HF in transmission mode the handset must be hooked off and the PTT
button on the handset has to be pressed. Transmission is indicated by the lighted TX
indicator.
Receive mode is always reached by releasing the PTT button.
Handset
hooked on
Transmit and receive is performed on the frequencies or channels shown in the telephone
display.
3.2

Listening for calls from a coast station

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 from 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.
On HF verbal traffic lists are transmitted in more frequency bands simultaneously. Search for
the channel with the best propagation conditions.
0735
Handset
hooked off Press PTT Release PTT
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