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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 ...
DSV-4 has a plug hatch 2 feet (0.61 m) in diameter, held in place mechanically with hatch dogs and, while submerged, by the pressure of the water above it. Sea Cliff was retired from active service in 1998 and subsequently given to Woods Hole Oceanographic Institution (WHOI). [ 3 ]
In 2011, Casteel was struggling financially when he spent several thousand dollars on an underwater camera apparatus and started taking pictures of dogs swimming underwater. [3] On February 9, 2012, Casteel's photos of underwater dogs were posted to Reddit and Google+. His photographs went viral and were viewed by millions.
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 ...
Remember That Robot Dog? It's Back With A 'Wheely' Cool Upgrade The Honey Badger 4.0 measures about 23.6 inches in length and stands between 9.8 and 19.6 inches high, weighing in at approximately ...
While ocean color is a key theme of ocean optics, optics is a broader term that also includes the development of underwater sensors using optical methods to study much more than just color, including ocean chemistry, particle size, imaging of microscopic plants and animals, and more.
The dogs are most effective when they can get right down to the water surface to smell and taste it, which requires a boat with low freeboard. [20] Dog searches for underwater cadavers is complicated by the movement of water and wind, which move the smell away from the source. [21]
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 ...