Modern
An alternative to the diving helmet that allows communication with the surface is the full face diving mask. These cover the diver's face and are held onto his head by adjustable straps.
"Diving helmet" sometimes means a hard safety helmet like a workman's helmet that covers the top and back of the head, but is not sealed. These may be worn with a full-face mask to provide impact protection.
During the First World War the British Army used a few diving helmets out of water as emergency protection from mustard gas.
Read more about this topic: Kirby Morgan
Famous quotes containing the word modern:
“The critical method which denies literary modernity would appear—and even, in certain respects, would be—the most modern of critical movements.”
—Paul Deman (1919–1983)
“No idea is so antiquated that it was not once modern. No idea is so modern that it will not someday be antiquated.”
—Ellen Glasgow (1874–1945)
“Most modern reproducers of life, even including the camera, really repudiate it. We gulp down evil, choke at good.”
—Wallace Stevens (1879–1955)