Hi,
Explorist210 is water repellent and proof to a certain extent, I would suggest you up your budget and buy a water proof floating GPS if you intend to use it for jet skiing. I think
Magellan or
Garmin has such models that
float on water
I agree with Greg, you will find detailed maps of only a few places only, and If u want to add detailed maps, I suggest u go for the models that have a SD Card expandable memory, this way u can store multiple base maps and detailed maps of multiple places simultaneously. Making own maps is really painful, so buy them
You can also buy
routing software for your Magellan so that u get turn by turn directions, so again a bigger memory will help.
I don't know your budget, but have a look at a
TOM TOM Rider GPS for the motorbike riders that has routing info, weather proof, bluetooth connectivity etc ... if possible check that out also.
Cheers
Anupam