Aeration – Associated with echo sounding-the blanket effect caused by air bubbles reflecting and refracting the sound energy transmitted by the diaphragm in the ship’s hull. Usually most noticeable when going astern or in rough weather A Hermit in« Current – A flow of electrical eoergj contiiiuouslj flowing Brst in one direction and then in reverse along a conductor. Usually, the term A.C. refers to…
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