Sounding Warning Signals - Furuno LH-3000 Operator's Manual

2. OPERATION

2.10 Sounding Warning Signals

Your Loud Hailer has eight different warning signals: two manual and six automatic. The two
manual signals, YELP and MAN, are designed to be sounded at each press of the PTT
switch on the microphone. The six automatic signals are sounded when the [FUNC] key is
operated.
Only the horn speakers sound warning signals and the volume is automatically set to
maximum when sounding warning signals.
Description of warning signals
Manual warning signals
MAN: Signal for passing. The lengths and timing of the horn blasts are controlled by
pressing the PTT switch on the microphone.
YELP: Yelp type emergency siren.
Automatic warning signals
UNWY: Warning signal for power-driven vessels underway. One 5-second blast at 120
second interval intervals.
5 s
14
500 Hz
250 Hz
Yelp signal
120 s
Underway signal
1 s