At the beginning of the war the escort ship would visually search for and detect the submarine. Sailors would strain through binoculars to sight a surface U-boat or, if the submarine were submerged, the tell-tale periscope and its feather-like wake. Once the submarine was sighted the escort ship would attack with gunfire and then, if in a good position, attempt to ram the submarine. Now, with the submarines attacking submerged, the escort ships were fitted with sound detection equipment. Initially these were hydrophones or listening instruments lowered into the water to hear the sounds' of a submarine's propellers. Once the submarine was detected, either visually or by sound, the escort ships would race for the sound "contact" with guns firing if part of the submarine or its periscope were visible.
Is there any way to force the escorts to fire at periscopes and be more accurate also??
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