It is recommended to leave the circuit breaker off until you are about to drop anchor.
A friend was delivering a 60/70' motor yacht from San Francisco to Seattle, as you may know beating against the nasty waves and the wind of the Pacific Ocean. Very cold so everybody was inside.
The windlass turned itself on, probably a lose connection after pounding the waves for one thousand miles. They probably did not notice for hours (pounding the waves on a motor yacht is noisy).
The ensuing fire melted the GRP bow.
They were able to put the fire off and barely made it to a safe harbor.
John Bernard "JB" Duler
Meltem # 19, Western Med