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:
“If you look at the 150 years of modern China’s history since the Opium Wars, then you can’t avoid the conclusion that the last 15 years are the best 15 years in China’s modern history.”
—J. Stapleton Roy (b. 1935)
“A modern fleet of ships does not so much make use of the sea as exploit a highway.”
—Joseph Conrad (1857–1924)
“And of the other things death is a new office building filled with modern furniture,
A wise thing, but which has no purpose for us.”
—John Ashbery (b. 1927)