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Diver communications are the methods used by divers to communicate with each other or with surface members of the dive team. In professional diving, diver communication is usually between a single working diver and the diving supervisor at the surface control point. This is considered important both for managing the diving work, and as a safety ...
The FILBE system is a solid coyote brown color. It is a modular system that allows its users to configure the system to individual/mission need. It consists of a larger framed rucksack, labeled "USMC MAIN PACK," a smaller assault-style pack, labeled "USMC ASSAULT PACK," and a three-liter CamelBak hydration carrier.
Underwater acoustics (also known as hydroacoustics) is the study of the propagation of sound in water and the interaction of the mechanical waves that constitute sound with the water, its contents and its boundaries. The water may be in the ocean, a lake, a river or a tank. Typical frequencies associated with underwater acoustics are between 10 ...
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Message in a bottle. This bottle and its contents (sample postcard and insert shown above) were launched in 1959 by the United States Coast and Geodetic Survey and were found in 2013. [1] A message in a bottle (abbrev. MIB [2]) is a form of communication in which a message is sealed in a container (typically a bottle) and released into a ...
Below the bottom woofer is a bass reflex port. A loudspeaker enclosure or loudspeaker cabinet is an enclosure (often rectangular box-shaped) in which speaker drivers (e.g., loudspeakers and tweeters) and associated electronic hardware, such as crossover circuits and, in some cases, power amplifiers, are mounted.
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