Out on the water it is important to have a means of communication if it all goes pear shaped. A phone in a waterproof case is good insurance but don't risk your expensive phone! 

Waterproof phone cases such as Aquapac and Overboard are rated as submersible to certain depths for a period of time (see individual listings for the IP rating).

There are also cases specifically for VHF radios that accommodate the antenna.
Your GPS (although it may have a waterproof rating) may also benefit from some extra protection - depending on model they will fit in Aquapac 358, 368 or a smaller VHF case for models with the bigger aerial.

Aquapac also make a wide variety of cases for other items such as insulin pumps - if you have a particular requirement contact us.

Tips:

1. We are out on the water a lot so our cases get a good workout - we actually replace them after 6 months of constant use. They then get used for storing keys, cards or other items, stashed in the day hatch for extra protection.
2. When not in use store your phone case closed, so it is not flexing on the hinge line.
3. Always check the seal for grains of sand or salt crystals.