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:
“In the deeper layers of the modern consciousness ... every attempt to succeed is an act of aggression, leaving one alone and guilty and defenseless among enemies: one is punished for success. This is our intolerable dilemma: that failure is a kind of death and success is evil and dangerous, is—ultimately—impossible.”
—Robert Warshow (1917–1955)
“I may be old-fashioned. I don’t like this modern movement.... And yet, there are certain sorts of work a woman may well do; teaching, being governess, or any taking care of children.”
—Julia Dent Grant (1826–1902)
“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)