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At both Perth and Bermuda the sound channel axis occurs at a depth of around 1,200 m (3,937 ft). Where the path meets the Antarctic Convergence at 52º south there is no deep sound channel but a 30 m (98 ft) in depth surface duct and a shallow sound channel at 200 m (656 ft). As the path turns northward, a station at 43º south, 16º east ...
Sofar bomb. In oceanography, a sofar bomb (Sound Fixing And Ranging bomb), occasionally referred to as a sofar disc, [1] is a long-range position-fixing system that uses impulsive sounds in the deep sound channel ( SOFAR channel) of the ocean to enable pinpointing of the location of ships or crashed planes. The deep sound channel is ideal for ...
The SOFAR channel (short for Sound Fixing and Ranging channel), or deep sound channel (DSC), is a horizontal layer of water in the ocean at which depth the speed of sound is minimal, in average around 1200 m deep. [2] It acts as a wave-guide for sound, and low frequency sound waves within the channel may travel thousands of miles before ...
Depth sounding. A sailor and a man on shore, both sounding the depth with a line. Depth sounding, often simply called sounding, is measuring the depth of a body of water. Data taken from soundings are used in bathymetry to make maps of the floor of a body of water, such as the seabed topography. Soundings were traditionally shown on nautical ...
During World War II, naval personnel stationed at Point Sur, California conducted experiments with early sonar and radar systems. In 1949, while conducting research into the use of sound to detect submarines, the U.S. Naval Research Laboratory reported it was able to detect submarines at ranges of 10 to 15 nautical miles (19 to 28 km; 12 to 17 mi) using SOFAR hydrophones off Point Sur.
The Sacramento Deep Water Ship Channel was authorized by the River and Harbor Act of 24 July 1946. [4] It is a modification of, and a supplement to, the Sacramento River Shallow Draft Navigation Project, which was adopted by the River and Harbor Act of 3 March 1899 and was started in September 1899 and completed in 1904.
Hummingbirds are incredibly agile in the air. They fly forwards and backwards to move from plant to plant and perch to perch, and they employ the hovering mode when extracting nectar from feeders ...
SOSUS. Sound Surveillance System (SOSUS) was the original name for a submarine detection system based on passive sonar developed by the United States Navy to track Soviet submarines. The system's true nature was classified with the name and acronym SOSUS classified as well. The unclassified name Project Caesar was used to cover the installation ...
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