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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 .
A deep-sea lead, the heaviest of sounding leads, was used in water exceeding 100 fathoms in depth. [21] This technique has been superseded by sonic depth finders for measuring mechanically the depth of water beneath a ship, one version of which is the Fathometer (trademark). [22] The record made by such a device is a fathogram. [23]
A collection of fishing rods A fly fishing rod Line guides on modern fishing rods Fishing with a fishing rod. A fishing rod or fishing pole is a long, thin rod used by anglers to catch fish by manipulating a line ending in a hook (formerly known as an angle, hence the term "angling").
Drone fishing - Rod fishing assisted by a drone, the drone can be a flying type or underwater type, it can be remote controlled by a human, computer, AI or a combination of the three simultaneously. The drone is used to scout for fish via camera, carry the hook to a far off location, cast the hook, reel in the fish and return.
TRAVEL QUESTIONS: Simon Calder answers your questions on the best time of year to visit Thailand, late deals for holidays, and ‘Lake Como on the cheap’
Most adult female ceratioid anglerfish have a luminescent organ called the esca at the tip of a modified dorsal ray (the illicium or fishing rod; derived from Latin ēsca, "bait"). The organ has been hypothesized to serve the purpose of luring prey in dark, deep-sea environments, but also serves to call males' attention to the females to ...
The earliest known depth measurements were made about 1800 BCE by Egyptians by probing with a pole. Later a weighted line was used, with depths marked off at intervals. This process was known as sounding. Both these methods were limited by being spot depths, taken at a point, and could easily miss significant variations in the immediate vicinity.
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