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A diver getting ready to dive in front of an alpha flag. As a code signal the International maritime signal flag Alpha (or "Alfa", signifying the letter "A") has the meaning of "I have a diver down; keep well clear at slow speed", [1] used to indicate that the vessel has limited maneuverability, and the presence of a diver in the water around the boat.
dive factor. See also: Scuba gas planning#Respiratory minute volume. Factor used in gas consumption estimates which allows for increased breathing rate due to conditions other than depth. Values range from 1.1 for relaxed, stress free conditions to more than 3.0 for heavy work. [31] dive flag Flag used to indicate that there are divers in the ...
The research found the most confusing emoji is actually not a confusing facial expression, but rather one painting a finger with nail polish, with 40% interpreting the emoji to mean “classy ...
This is a glossary of technical terms, jargon, diver slang and acronyms used in underwater diving. The definitions listed are in the context of underwater diving. There may be other meanings in other contexts. Underwater diving can be described as a human activity – intentional, purposive, conscious and subjectively meaningful sequence of ...
United States naval diver insignias are awarded, per degree of qualification, to sailors, Marines, and Coast Guardsmen. The elementary naval diver insignia is the Scuba Diver Insignia, awarded upon qualifying as a basic naval diver. Previously, the Scuba Diver Insignia was awarded in two degrees, one for officers and one for enlisted.
Surface-supplied diving where the breathing air is supplied to the diver by a simple hose. The diver usually breathes through a mouth held demand valve. air top air top-up. see: Gas blending for scuba diving#Air top-up. 1. Completing a planned breathing gas mix by topping up the cylinder with compressed air to a calculated pressure. [12] 2.
Emoji Unicode name Codepoints Added in Unicode block Meaning 😀 Grinning Face U+1F600: Emoji 1.0 in 2015 Emoticons: Grinning: 😂 Face with Tears of Joy U+1F602: Emoji 1.0 in 2015 Emoticons see Face with Tears of Joy emoji: 😍 Smiling Face with Heart-Shaped Eyes U+1F60D: Emoji 1.0 in 2015 Emoticons see Face with Heart Eyes emoji: 🕴️
In the communication used by scuba divers, the OK sign is specific in its meaning that "everything is OK" as regulated by the Recreational Scuba Training Council. Divers are taught to always use this sign and not the thumbs up gesture because the latter means that a diver needs to ascend. [ 12 ]