"Len Krauss" wrote in message
...
My GPS (with an anchor drag alarm feature) is not located in sleeping
berth.

You don't mention what kind of GPS you have - but are you sure there is no
means to connect an external alarm? My GPS (a Raymarine 420) had a totally
useless "alarm" that wouldn't wake a sleeping mouse, so I pulled it to bits
and connected an external alarm. I subsequently discovered that Raymarine
will actually do this as a free after market mod, realising that it was a
bit dumb to ever build something with an inaudible alarm.