The Casio G-Shock GW7900B-1, part of the G-Rescue line, is a robust digital watch designed for marine activities. It features advanced tide graphing capabilities and Tough Solar charging, making it a reliable tool for surfers and other water sports enthusiasts. This model combines G-Shock's signature durability with specialized functions for the ocean environment.

• Tide graph with tide level memory for up to 140 tide sites
• Moon data (moon age and moon phase)
• Tough Solar power system
• Multi-Band 6 Atomic Timekeeping
• 200-meter water resistance
• Shock-resistant structure
• Full auto EL backlight with afterglow
• World time with 48 cities (29 time zones)
• Stopwatch, countdown timer, and alarm functions
• Battery power indicator
• Black resin band and case
• Negative LCD display