Furuno LH-3000 - Manual (Page 19)

2. OPERATION
13
Manually selecting a calling station
1. Press the [Intercom Select] key until the indicator lights for the desired station.
2. Press the PTT switch on the microphone and answer the call.
3. Release the PTT switch to listen to the intercom station. Adjust listening volume with the
[LISTEN VOL] control if necessary.
4. To call another station, select the next station with the [Intercom Select] key.
5. After you have finished all conversations, press the [Hail Select] key to return to the
standby mode.
Intercom station operation
Press the button on the intercom to call. Release the button to listen.
2.9 Hailing by Voice
1. Press the [Hail Select] key until the indicator lights for the desired horn speaker(s).
2. Press the PTT switch on the microphone and speak into the microphone. If necessary,
adjust the output power to the speaker(s) with the [HAIL VOL] control.
3. Release the PTT switch and the Loud Hailer will switch to the listening mode, using the
speaker(s) as microphone(s). If necessary, adjust listening volume with the [LISTEN
VOL] control.
4. After speaking, press the [Hail Select] key to return to the standby mode.