On Wed, 29 Aug 2007 14:41:28 +0200, Marc Heusser
alid wrote:

My GPS has a nice featu anchor watch, including an alarm output (also
for other alarms) to drive a relay (0.5 A maximum).

What do you connect that will wake you under all circumstances?

You should connect the largest high quality anchor that you and your
boat can handle, sufficient chain and line for your water depth (at
least 5 to 1 scope at high tide), ensure the anchor is well set by
backing down hard on it with the engine, and go to sleep. If you do
that faithfully you will be OK in all but the strongest wind squall,
and trust me on this, that *will* wake you up.