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:
“All modern American literature comes from one book by Mark Twain called Huckleberry Finn.... American writing comes from that. There was nothing before. There has been nothing as good since.”
—Ernest Hemingway (1899–1961)
“The susceptibility of the average modern to pictorial suggestion enables advertising to exploit his lessened power of judgment.”
—Johan Huizinga (1872–1945)
“Just as modern mass production requires the standardization of commodities, so the social process requires standardization of man, and this standardization is called equality.”
—Erich Fromm (1900–1980)