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The chances of snagging the diver's equipment on line depends on awareness of the line's position relative to the diver, and the number of possible snag points on the diver's equipment. The ability to release a line snag depends on the ability to identify and reach the snag.
The diver must be able to safely reach a reliable alternative source of breathing gas at all times during the planned dive. Plans for technical contingencies may include arrangements for alternative equipment, spares, alternative boat etc. The level of contingency planning will depend on the project, and the importance of the task.
In 1908 she was joined by a snag scow, Tackle (30 GRT, 64 x 28 x 3.5), which was designed to operate in much shallower waters. [4] [5] She retired in 1921 after the completion of her replacement, Bear (242 GRT), and was converted into a quarter boat. [1] Her steam engine was utilized in the snagboat Yuba (410 GRT) built in 1925. [6]
The snagboat Montgomery on the Apalachicola River, Florida, during the early 1900s.. A snagboat is a river boat, resembling a barge with superstructure for crew accommodations, and deck-mounted cranes and hoists for removing snags and other obstructions from rivers and other shallow waterways.
The frame is designed to support different types of equipment, including bucket dredges as well as the snag boom. The boom is maneuvered by steam-powered winches, and there are steam-powered capstans to assist in stabilize the boat while snagging. The pilot house is set on a deck above the boilers. [3]
The Diver Life Raft and Surf Shuttle are inflatable safety devices for diving where currents or distance could create a life-threatening situation if the diver is separated from the dive boat. They are intended as flotation aids for lost divers or those facing long surface swims. [ 70 ]
A dive briefing or pre-dive briefing is a meeting of the diving team or dive group before the dive to allow the instructor, supervisor, dive leader or dive boat skipper to inform the attendees of the dive plan, contingency plans and emergency plans for the dive. The amount of detail presented should be appropriate to the dive, but there are ...
Artificial reefs can help increase biodiversity in an area. Artificial reef structures (ARs) have a variety of intended uses, ranging from the protection, enhancement and restoration of marine ecosystems [6] to the support of human activities like fishing, recreational diving and surfing. [23]