"The HEAVY WATER re-writes the book on the ultimate timepiece for ocean adventures. The exceptional design of the stainless steel air-flow case keeps everything comfortable by allowing moisture to evaporate from under the watch. This World Tide model features 30 preset and five programmable locations. Matte Finished Stainless Steel Case Unique ""Air Flow"" Case Design Digital Display 30 Preset Tide locations programmed until the year 2099 and 5 Customizable World Tide Locations (See Below) Air and Water Temperature Sensor Countdown Heat Timer Multiple Alarms Chronograph Month, Day, Date, Year Unidirectional Rotating Bezel Solid, Forged 316L Stainless Steel Case and Caseback; Extra hard, marine-grade stainless steel permits fine finishing and resists corosion. Caseback is made to provide a superior fit, increased strength and water resistance. Secure screwed-on integrated genuine rubber strap Extra Thick Hardened Mineral Glass Lens; This K1-Hardened Mineral Crystal combines exceptional scratch resistance with unmatched shatter resistance. Electro Luminescent Backlight offers visibility for low-light, night-time and diving visibility Shock Resistant Movement Holder; A special casing helps to protect the already Shock Resistant Japanese Quartz Movement from severe impacts. Square Profile Caseback Seal; Having more surface area than the typical O-Ring seal, this provides a significantly superior water-tight seal. Comes encapsulated in a protective standing metal case and is revealed by rotating the outer case half. The watch comes with an extra-long genuine rubber strap to accomodate a wet-suit with buckle clasp Water Resistant to 200 Meters (660 Feet) 39.6mm Case Width (Approximately 1 1/2"") not including the crown 18.4mm Case Thickness (Approximately 3/4"") Weight: 119 Grams #R {color:d3d3d3; font-family:arial; font-size:12} World Tide Graph Locations Bodega Bay, CA Santa Cruz Pt., CA Rincon, CA San Clemente, CA San Diego, CA Pensacola, FL Virginia Beach, VA Cape Hatteras, NC Sebastian Inlet, FL San Juan, PR Recife, Brazil Rio de Janiero, Brazil Cap Ferret, France Corpus Christi, TX Durban, South Africa Reunion Island, I.O. Colombo, Sri Lanka Bali, Indonesia Gold Coast, Australia Sydney, Australia Sendai, Japan Enoshima, Japan Miyazaki, Japan Hilo, Hawaii Lahaina, Maui Honolulu, Oahu Hanapepe Bay, Kauai Cabo San Lucas, Mexico Puerto Escondidi, Mexico Dominical, Costa Rica Tide watches are not intended to be used for navigation purposes. Local NOAA tide charts should be used when accurate tide information is necessary. The tide formula used in this watch is intended to predict “relatively” accurate tidal flow information, and its accuracy may vary by location, time of year and weather condition."