We have the blue and white Magellan Meridian Marine GPS. We use it on our Hobie20! It works great. Easy to read, very accurate (within 3 meters). We carry it in a blue and clear pvc waterproof bag from West Marine that has a lanyard (perfect fit). We put the lanyard around our neck and it's always there.

The battery life is ALL DAY+. Usually about 12-14hrs as I use NiMH 1600 or 1750 AA batteries.

On the down side of these GPS's - as of date there are no downloadable maps. Also the power button tends to get pushed when you are carrying it on the boat.

Other than that I HIGHLY RECOMMEND THIS GPS!