I also have a Casio G-Shock that is a surfers model, gives you the tides, moon phase, moon rise & set, Sun rise & set, stopwatch, countdown & alarms for less than $100. You can set it for various surfspots around the world that are preprogramed or set it to your local Long/Lat. Got my on the web from www.watchesplanet.com
appeared to have come straight from the factory in Malaysia.
3/17 0700 hrs. I've edited the website above as I had erred and left out the E.