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  2. History of underwater diving - Wikipedia

    en.wikipedia.org/wiki/History_of_underwater_diving

    1842 sketch of the Deane brothers' diving helmet Standard diving dress with Dräger DM-40 semi-closed circuit nitrox rebreather set. In 1405, Konrad Kyeser described a diving dress made of a leather jacket and metal helmet with two glass windows. The jacket and helmet were lined by sponge to "retain the air" and a leather pipe was connected to ...

  3. Standard diving dress - Wikipedia

    en.wikipedia.org/wiki/Standard_diving_dress

    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.

  4. Diving helmet - Wikipedia

    en.wikipedia.org/wiki/Diving_helmet

    The usual meaning of diving helmet is a piece of diving equipment that encases the user's head and delivers breathing gas to the diver, but the term "diving helmet", or "cave diving helmet" may also refer to a safety helmet like a climbing helmet or caving helmet that covers the top and back of the head, but is not sealed. These may be worn ...

  5. Ohio River - Wikipedia

    en.wikipedia.org/wiki/Ohio_River

    The Ohio River at Cairo is 281,500 cu ft/s (7,960 m 3 /s); [1] and the Mississippi River at Thebes, Illinois, which is upstream of the confluence, is 208,200 cu ft/s (5,897 m 3 /s). [66] The Ohio River flow is greater than that of the Mississippi River, so hydrologically the Ohio River is the main stream of the river system.

  6. Timeline of diving technology - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_diving_technology

    The timeline of underwater diving technology is a chronological list of notable events in the history of the development of underwater diving equipment.With the partial exception of breath-hold diving, the development of underwater diving capacity, scope, and popularity, has been closely linked to available technology, and the physiological constraints of the underwater environment.

  7. List of locks and dams of the Ohio River - Wikipedia

    en.wikipedia.org/wiki/List_of_locks_and_dams_of...

    This is a list of locks and dams of the Ohio River, which begins at the confluence of the Allegheny and Monongahela rivers at The Point in Pittsburgh, Pennsylvania and ends at the confluence of the Ohio River and the Mississippi River, in Cairo, Illinois. A map and diagram of U.S. Army Corps of Engineers operated locks and dams on the Ohio River.

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Wikipedia:Featured picture candidates/George Washington's map ...

    en.wikipedia.org/wiki/Wikipedia:Featured_picture...

    Original - George Washington's map of the Ohio River and surrounding region with notes on French intentions, 1753 or 1754. Reason A historic map not just because of who made it, but because it documents the beginning of the French and Indian War. Washington worked as a surveyor in his youth, so he was capable of producing this himself and the ...