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The distance to the seabed can also be accurately measured when nearing touchdown. The units' life-support systems have 246 man-hour capacity, or 3.42 days for a three-person crew. The units are designed for pressure at 6,000 metre depth, and have been tested to 125% of that pressure.
The standard measurement for underwater visibility is the distance at which a Secchi disc can be seen. The range of underwater vision is usually limited by turbidity. In very clear water visibility may extend as far as about 80m, [18] and a record Secchi depth of 79 m has been reported from a coastal polynya of the Eastern Weddell Sea ...
Accommodation is the process by which the vertebrate eye changes optical power to maintain a clear image or focus on an object as its distance varies. In this, distances vary for individuals from the far point—the maximum distance from the eye for which a clear image of an object can be seen, to the near point—the minimum distance for a ...
Two Texas fishermen and a dog survived an EF-3 tornado on a fishing boat. ... Johnson's friend appears to acknowledge the tornado in the distance, but the two appear unbothered by the severe ...
Experiments in 1659 by Robert Boyle of the Royal Society were made using a barometer underwater, and led to Boyle's law. [1] The French physicist, mathematician and inventor Denis Papin published Recuiel de diverses Pieces touchant quelques novelles Machines in 1695, where he proposed a depth gauge for a submarine. [2]
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Baited remote underwater video (BRUV) is a system used in marine biology research. By attracting fish into the field of view of a remotely controlled camera, the technique records fish diversity , abundance and behaviour of species.
A report from the U.S. surgeon general suggested that labels on alcoholic drinks should warn about cancer risk. Doctors expressed their agreement. For people wondering about the long-term damage ...