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:
“The modern city hardly knows pure darkness or pure silence anymore, nor does it know the effect of a single small light or that of a lonely distant shout.”
—Johan Huizinga (1872–1945)
“The reason for the sadness of this modern age and the men who live in it is that it looks for the truth in everything and finds it.”
—Edmond De Goncourt (1822–1896)
“The ancients of the ideal description, instead of trying to turn their impracticable chimeras, as does the modern dreamer, into social and political prodigies, deposited them in great works of art, which still live while states and constitutions have perished, bequeathing to posterity not shameful defects but triumphant successes.”
—Herman Melville (1819–1891)