few good covers out there.. I have one that is pretty hard core 'clips together etc, (Australian Brand?) then stick that in an Aqaua pack..dry as..including surf sessions.
Boat tracker..is not a bad App , live map, time, speed average etc..Or check out 'yacht bot'.. as used in big boat races, your data is tracked live onto the internet!
Watch out though the Mrs might set if off on your phone when you least expect and track your every move!