Diving helmet
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| This article is part of the hats and headgear series: |
| Overview of headgear |
| Hats; Bonnets; Caps |
| Hoods; Helmets; Wigs |
| Masks; Veils; Scarves |
| Tiaras; Papal tiaras |
| Crowns; Types of crowns |
| List of hats and headgear |
Diving helmets are worn by divers who need to speak and hear underwater. A normal diving mask and diving regulator prevent the diver from effectively communicating. Diving helments are mostly used with surface supplied diving: the helmet acts as a firm anchor point on the diver for the umbilical supplying the breathing gas. Divers do heavy or dangerous work underwater also benefit from the head protection provided by the helmet.
There are several types of diving helmets :
- the spherical copper helmets with brass and glass windows of the historical standard diving dress
- the modern commercial helmet, such as, the Kirby Morgan (http://www.divingsystems.com/History/ourhistory.html) Superlite-17B helmet
- light weight, recreational "transparent dome" type helmets
An alternative to the diving helmet that allows communication with the surface is the full face diving mask.
"Diving helmet" sometimes means a hard safety helmet like a workman's helmet that covers the top and back of the head but not the face and does not keep air in and water out.
During the First World War English Army used a very few number of diving helmets to prevent damages from the use of mustard gas because it can cause damages even only with skin contact.