VDO Ocean Line 08 601 101 Instrucciones De Montaje página 19

The acoustic alarm can be switched off by pressing the button. It stops
automatically when the depth below keel is greater than the set thres-
hold.
The alarm function is deactivated if the button is quickly pushed twice
when the current depth (2.7 m in the example) is displayed.
ALARM
2.7
Push button
Push button
off
2.7
35