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Class E (Electrical) provides dielectric protection up to 20,000 volts. Class G (General) provides dielectric protection up to 2,200 volts. Class C (Conductive) provides no dielectric protection. A hard hat is specified by both Type and Class; for example: Type I Class G. ANSI standards for hard hats set combustibility or flammability criteria ...
For example, if a sailor has the pay-grade of E-5 (rank of petty officer second class) and the rating of boatswain's mate, then combining the two—boatswain's mate second class (BM2)—defines both rank and rating in formal address or epistolary salutation. Thus, boatswain's mate second class (BM2) would be that sailor's rate.
However, the U.S. Army and Navy put together a hard hat diving unit in August 1945 that recovered millions of Pesos off USS Teak. [24] During WWII, "diver" was a qualification not a rate. First class divers could work 300 ft (91 m) depths while salvage and second class divers were qualified down to 150 ft (46 m). [3]
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly used for all relatively deep underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications.
All E-1s through E-3s are known as seaman, fireman, airman, constructionman, or hospitalman. E-4 through E-6 are called petty officers. All E-7s are called chief petty officer, E-8s senior chief petty officer, and E-9s master chief petty officer. [1] Rates are displayed on a rating badge, which is a combination of rate and rating. E-2s and E-3s ...
This page was last edited on 24 January 2023, at 17:52 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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