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:
“American time has stretched around the world. It has become the dominant tempo of modern history, especially of the history of Europe.”
—Harold Rosenberg (1906–1978)
“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)
“As far as modern writing is concerned, it is rarely rewarding to translate it, although it might be easy.... Translation is very much like copying paintings.”
—Boris Pasternak (1890–1960)