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: Diving Helmet
Famous quotes containing the word modern:
“... it must be obvious that in the agitation preceding the enactment of [protective] laws the zeal of the reformers would be second to the zeal of the highly paid night-workers who are anxious to hold their trade against an invasion of skilled women. To this sort of interference with her working life the modern woman can have but one attitude: I am not a child.”
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