The Marathon Search & Rescue Divers Automatic is a dive watch built to ISO 6425 standards. Designed for use by Search and Rescue (SAR) divers and issued to the United States Marine Corps, the Divers Automatic is a watch built to withstand the most extreme conditions. The Divers Automatic is also known as the Government Search and Rescue (GSAR).The Divers watch is water resistant down to 30 ATM - 300 meters (1000 feet) underwater. Built from 316L surgical grade stainless steel, the watch is a high quality, purpose built watch that will reliably accompany you wherever you take it. It uses a scratch resistant, sapphire glass crystal to ensure that the dial can be read even under direct sunlight, or deep underwater.