Rule has a high frequency ear piercing alarm.
I was "measuring up" a DE last weekend and when I got out of my car in the parking lot my "ears were ringing" from "something".
At 1st I thought it was a transformer or something.
When I got on the boat I knew it was "something" on the boat.
Not knowing the boat I had to hunt around and it was the Rule alarm.
I called the owner and he could hear it as I was talking to him.
He had a crew member install the alarm day before and it had rained heavy overnight.
Thought it through some more.
I'll some how manage to glass a block to mount the float switch down in the keel, low but not too low and I'll use that switch off the alarm/buzzer that I plan to mount at the helm and I'll wire it to a 2nd bilge pump for the keel. Was planning to add a 2nd bilge pump down there anyway.