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The diver or part of the diver's equipment gets snagged or entangled on the buoy or line, dragging the diver up, [18] with possibly fatal consequences. [19] To avoid this, a diver may: [ 16 ] tie the lanyard of the reel to something solid on the sea bed before inflating the buoy, giving time to sort the problem out.
Diver down flag being flown on a dive ship. The use of the red and white flag, which was created in the early 1950s by Navy veteran Denzel James "Doc" Dockery of Michigan, and popularized by Ted Nixon of US Divers, [4] is required by law or regulation in many US states, Canada, [5] and some other countries (e.g. Italy). [6]
The diver ascends along the shotline, and may use it purely as a visual reference, or can hold on to it to positively control depth, or can climb up it hand over hand. A Jonline may be used to fasten a diver to an anchor line or shot line during a decompression stop. [37] Shot line configurations: Basic shot line [37] Self tensioning arrangements
They usually have a connected line allowing them to be pulled in. Self-locating datum marker buoys (SLDMB) are 70% scale Coastal Ocean Dynamics Experiment (CODE)/Davis-style oceanographic surface drifters with drogue vanes between 30 and 100 cm deep, [ 16 ] designed for deployment from U.S. Coast Guard vessels or airframes for search and rescue.
A diver down flag, or scuba flag, is a flag used on the water to indicate that there is a diver below. Two styles of flag are in use. Two styles of flag are in use. Internationally, the code flag "alpha", which has a white hoist and blue swallowtail fly, is used to signal that the vessel has a diver down and other vessels should keep well clear ...
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In underwater diving, a downline is a piece of substantial cordage running from a point at the surface to the underwater workplace, and kept under some tension. It can be used as a guideline for divers descending or ascending, [1] for depth control in blue-water diving, [2] and as a guide for transfer of tools and equipment between surface and diver by sliding them along the downline at the ...
International maritime signal flags are various flags used to communicate with ships. The principal system of flags and associated codes is the International Code of Signals . [ 1 ] Various navies have flag systems with additional flags and codes, and other flags are used in special uses, or have historical significance.
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