Also, you can listen for the hummm. . .
. . . as the cable extends under tension. Once the keel is all the way down, the humm stops. Like Rico said, you will also feel the tension on the winch let up. I have found that it takes about 25 turns to raise/lower the keel. So now, I count out 25 and then see if I am there. I'm thinking of experimenting with some sort of indicator for keel position over the winter.Regards,Ted