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:
“By his very success in inventing labor-saving devices, modern man has manufactured an abyss of boredom that only the privileged classes in earlier civilizations have ever fathomed.”
—Lewis Mumford (1895–1990)
“The truth is rarely pure and never simple. Modern life would be very tedious if it were either, and modern literature a complete impossibility!”
—Oscar Wilde (1854–1900)
“The modern state no longer has anything but rights; it does not recognize duties any more.”
—Georges Bernanos (1888–1948)