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:
“Whosoever, in writing a modern history, shall follow truth too near the heels, it may haply strike out his teeth.”
—Sir Walter Raleigh (1552–1618)
“However far modern science and technics have fallen short of their inherent possibilities, they have taught mankind at least one lesson: Nothing is impossible.”
—Lewis Mumford (1895–1990)
“It was announced that the trouble was not “malignant.”... It was a typical triumph of modern science to find the only part of Randolph that was not malignant and remove it.”
—Evelyn Waugh (1903–1966)