Use Comeup winch about 5 years 15000 model. Winching hundred times, only twise rebuild it. It is very very, very reliable. Idea that motor and brake is not germetic is very good. No strong corrosion after deep water. Only couple points of negative - motor body inside is not painted - so in the water it get rusted and all bolts and nuts inside motor should be from stainless stell. Come up rescued me many times!