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.
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Famous quotes containing the word modern:
“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)
“In most other modern societies working mothers are not put under these special and exaggerated pressures. For example, French and English mothers often prefer to breast-feed their babies, but they do not feel that their womanhood is at stake if they fail to do so. Nor does anyone else.”
—Sylvia Ann Hewitt (20th century)
“The susceptibility of the average modern to pictorial suggestion enables advertising to exploit his lessened power of judgment.”
—Johan Huizinga (1872–1945)