Then you'll need to keep time and to do that you'll need a watch holder for your GPS or watch.
It floats with your GPS watch
Will not get knocked off your deck or lose suction
Adjustable for any kayak with a cockpit combing
Can be used with a spraydeck
Buy yours at Wash Rider: http://www.washrider.com/collections/boat-care/products/wash-rider-gps-holder
This is a premium ad!