Can you keep it dry enough to work reliably when in peril?

We lost an I-phone and GPS in the Steeple chase last week, 1/2 mile from shore. I'm sure you Tybee guys have all sorts of stories about failed/lost/water-logged comminication gear.

Then again, it probably will be a milk run and everyone will be sunburned while they are sipping Mojitos and smokin' Diplomaticos!