Details: 

• water resistance: 100m / 10atm
• custom digital pre-programmed tide information for 550 beaches across the globe.
• Including high/low tide time and height, as well as sunrise/sunset.
• features date, chronograph timer, 3 alarms, back-light, and patented belt looper.
• change your display to see the tides, or just the "normal-clock-stuff".