Raymarine RAY230E Owner's Handbook Manual page 69

Operations
11) Intercom Call Sound 4
This sound is made upon receiving a call using the Intercom function,
when selected through the Menu operation. If Off-Hook, the sound
emits from the handset; if On-Hook, the sound emits from the external
speaker at a low volume. The call volume level is determined by the
sound volume setting.
12) Siren 1 ("Hi-Lo" Sound)
Select this sound option under Siren in the Menu operation. While in
Fog/Siren mode, pressing and releasing the PTT switch emits a
continuous "Hi-Lo" sound from the Hailer Horn speaker at maximum
volume. Pressing PTT again, the Hi-Lo sound stops.
13) Siren 2 (Siren Sound)
Select this sound option under Siren in the Menu operation. While in
Fog/Siren mode, pressing and releasing the PTT switch emits a
continuous siren sound from the Hailer Horn speaker at maximum
volume. Pressing PTT again, the siren sound stops.
14) Siren 3 (Whelp Sound)
Select this sound option under Fog Siren 1 in the Menu operation.
While in Fog/Siren mode, pressing and holding the PTT switch emits a
whooping or "whelp" sound from the Hailer Horn speaker at maximum
volume. When PTT is released, the whooping sound stops.
15) Siren 4 (Fog Horn)
Select this sound option under Fog Siren 1 in the Menu operation.
While in Fog/Siren mode, pressing and holding the PTT switch emits
an air horn sound from the Hailer Horn speaker at maximum volume.
When PTT is released, the air horn stops.
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