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But when you go on the internet in search of the best sailboat depth finders, it's unfortunate that you'll come across fish finders instead. When it comes to sailing, you'll enjoy it a lot more if you're able to know the depth of the water where you're sailing at. It's, therefore, important to go for a depth finder that can offer you real-time updates to ensure that you stay safe at all times. The basic principles used in these early devices have not been significantly changed.When sailing, a depth finder is a must-have accessory if you want to enjoy yourself without worrying about hitting the bottom while out there on the water.Īnd even though they're all made to serve the same purpose, they're not made the same. About 1927 a similar device was manufactured under the trade name Fathometer. Navy in 1919, consisted of (1) a device to generate and send sound waves to the ocean floor and receive the reflected waves and (2) a timer calibrated at the speed of sound in seawater that directly indicated water depth. One of the first practical depth sounders, the so-called Hayes sonic depth finder, developed by the U.S. Hydrographers use echo sounders in charting the oceans and in survey work to discover underwater pinnacles and shoals. Sonic depth finders can be operated repetitively, recording thousands of soundings per hour, to prepare a profile of the ocean floor. In addition to protecting ships from shoal water, peacetime uses include locating fish, measuring the thickness of ice in Arctic regions, and oceanographic charting. During World War II the name sonar ( q.v.) was applied in an analogy to radar, and the device was used extensively to detect submarines. Sonic pulses are also sent out to detect underwater objects by the same principle. Sonic depth finders are in operation on practically every important class of ship, naval and merchant, and are also used on small craft.
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