The Casio GL-7500HD, 65$, is great for all kinds of water sports like swimming, surfing, water skiing, body boarding etc. The vibrating alarm makes sure you are aware of the time while doing these activities, since you might not hear it. Water enthusiasts will also enjoy the tide graph and water resistance to 200 meters (around 650 feet). The rest of the features include a choice of three daily alarms and one snooze alarm, a countdown timer, stopwatch with a resolution of 1/100 of a second, and the Automatic calendar. Pick this one up if your looking for an inexpensive, durable watch thats great for the water.