{"id":49953,"date":"2017-07-27T13:59:40","date_gmt":"2017-07-27T13:59:40","guid":{"rendered":"https:\/\/baleinesendirect.org\/utilise-t-on-les-sonars-pour-trouver-les-baleines\/"},"modified":"2020-03-18T19:53:36","modified_gmt":"2020-03-18T19:53:36","slug":"are-sonars-used-to-locate-whales","status":"publish","type":"post","link":"https:\/\/baleinesendirect.org\/en\/are-sonars-used-to-locate-whales\/","title":{"rendered":"Are sonars used to locate whales?"},"content":{"rendered":"<p>By Maureen Jouglain<\/p>\n<p>From the inflatable boat to the large ferry, every whale-watching boat is equipped with a radar and a sonar. While radar is used to probe fog and detect objects on the surface, sonar is employed to explore the seabed.<\/p>\n<h2>What is sonar?<\/h2>\n<p>A sonar system generally emits ultrasonic pulses by means of an apparatus located on or in the hull. These electrical pulses produced by the transmitter are converted into sound waves and then sent into the water. The mechanical waves thus travel through the water and bounce back as soon as they strike an object. The echo then returns to the probe. The sonar converts it into an electrical signal that is amplified by the receiver and then sent to the screen. Since sound velocity in water is constant, the elapsed time between signal transmission and reception of the echo can be measured and used to calculate the distance of the object.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>By Maureen Jouglain From the inflatable boat to the large ferry, every whale-watching boat is equipped with a radar and a sonar. While radar is used to probe fog and detect objects on the surface, sonar is employed to explore the seabed. What is sonar? A sonar system generally emits ultrasonic pulses by means of [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":39810,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[29],"tags":[1469,1470,1471,1472,1473],"class_list":["post-49953","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-whale-qa","tag-bateau-en","tag-detection-en","tag-excursion-en","tag-radar-en","tag-sonar-en"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Are sonars used to locate whales? - Baleines en direct<\/title>\n<meta name=\"description\" content=\"By Maureen Jouglain From the inflatable boat to the large ferry, every whale-watching boat is equipped with a radar and a sonar. 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