What are the industry accepted water resistance recommendations?

 The following usage recommendations are accepted by most watch manufacturers.

• Water-resistant to 30 meters (100 feet/3atm). Will withstand splashes of water but should not be worn in contact with water. In respect of watches made by ourselves a 30m/99ft rating normally only applies to watches that use a plexiglas or acrylic crystal and are based on 1960’s (or earlier) designs where it is impractical to use a glass crystal because it would radically change the appearance of the watch.
• Water-tested to 50 meters (165 feet/5atm). Suitable for swimming in shallow water such as crossing rivers and in a pool. 
• Water-tested to 100 meters (330 feet/10atm). Suitable for swimming and snorkelling.
• Water-tested to 150 meters (500 feet/15atm). Suitable for snorkelling. 
• Water-tested to 200 meters (660 feet/20atm). Suitable for sports diving. 
• Water-tested to 300 meters (1000ft/30atm). Suitable for professional diving and military applications.
• Water-tested to over 1000 meters (3389ft/100atm). These watches have a helium escape value and are suitable for deep professional diving with mixed gases and challenging military applications.