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:
“Despair is typical of those who do not understand the causes of evil, see no way out, and are incapable of struggle. The modern industrial proletariat does not belong to the category of such classes.”
—Vladimir Ilyich Lenin (1870–1924)
“Kindness is a virtue neither modern nor urban. One almost unlearns it in a city. Towns have their own beatitude; they are not unfriendly; they offer a vast and solacing anonymity or an equally vast and solacing gregariousness. But one needs a neighbor on whom to practice compassion.”
—Phyllis McGinley (1905–1978)
“The modern state no longer has anything but rights; it does not recognize duties any more.”
—Georges Bernanos (1888–1948)