A non-rebreather mask is a special medical device that helps provide you with oxygen in emergencies. These masks help people who can still breathe on their own but need a lot of extra oxygen.

A non-rebreather mask is a medical device that helps deliver oxygen in emergency situations. It consists of a face mask connected to a reservoir bag that’s filled with a high concentration of oxygen.

The muscular U.S. Navy diver hoisted a 60-pound life-support regulator onto his back, then donned a 30-pound metal helmet. Fellow divers connected his diving suit to an "umbilical" hose pumping in ...

Yves Lefevre, cinematographer, and Matt Ferraro, lighting technician, dive with closed-circuit rebreathers, allowing them to swim backwards to film divers swimming over the Giant Table Coral without ...

ARLINGTON, Va.--The muscular U.S. Navy diver hoisted a 60-pound life-support regulator onto his back, then donned a 30-pound metal helmet. Fellow divers connected his diving suit to an "umbilical" ...

Rebreathers could make an ocean explorer’s ultimate fantasies come true. Recirculating the same air again and again might sound like science fiction, but compared against traditional scuba equipment, ...

The US Navy has begun pool testing of its new MK29 Mixed Gas Rebreather designed to conserve helium during deep sea dives below 170 ft (52 m). The test dives took place at the Naval Surface Warfare ...