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:
“Our modern wars make many unhappy while they last and make no one happy when they are finished.”
—Johann Wolfgang Von Goethe (1749–1832)
“I tell you, sir, the only safeguard of order and discipline in the modern world is a standardized worker with interchangeable parts. That would solve the entire problem of management.”
—Jean Giraudoux (1882–1944)
“I ask especially that no state shall, by law or otherwise, authorize the return of the saloon, either in its old form or in some modern guise.”
—Franklin D. Roosevelt (1882–1945)