Gosh, you guys.
We all use them for dive sites.
Each site has coordinates. And yes, they are hard to find if you don't have one, even in Hawaii. Unless you are pros with memorizing visual lineups, which I doubt.
Are ya'll really divers? Every real diver I know has a GPS. Unless you are buying a ticket on a boat that finds them for you.
I never assumed he meant underwater.
We have them on the bikes because they give your grade on a climb and track interval training.
You can then snap them off to use on hikes (locate a waterfall, etc) or to find dive sites, as a back up to the boat one, in case it malfunctions, your battery dies, or need to call the Coast Guard to mention where you are adrift.
sigh. I am not doing well in here today.
Then if you go to say, Normandy to cycle, you can pull up a little map.
Multifunctional gagets are the future, get with the program. Don't ya'll read Ouside and Adventure mags?
It's called a coat, Jon. ; ) I never get to wear coats, especially with my sister.