Raymarine Ray230 Owner's Handbook Manual page 74

Operations
12. Siren 1 ("Hi-Lo" Sound)
Select this sound option under Siren in the Menu operation. While in
Fog/Siren mode, pressing and holding the PTT switch emits a
continuous "Hi-Lo" sound from the Hailer Horn speaker at the selected
volume. Releasing PTT, 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 holding the PTT switch emits a
continuous siren sound from the Hailer Horn speaker at the selected
volume. Releasing PTT, 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 the selected
volume. When PTT is released, the whooping sound stops.
15. Siren 4 (Air 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 the selected volume.
When PTT is released, the air horn stops.
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