Re: handled GPS consumption while in achor watch mode?
The 76CS manual reports Battery Life a 20 hours with typical use. Absent the back light, it will likely be longer.
A useful alternative to the Anchor alarm is the MOB Function. Punching up the MOB button when the anchor is deployed will give one constant range and bearing to the anchor. If the range to the MOB exceeds one's swing circle, on is dragging. We have two GPS devices and use the Anchor Alarm on one--set when the anchor is dropped--and the MOB function on the other, set at the same time.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."