There was no doubt in his mind that Allied military forces would continue their westward drive across the Pacific, but he was uncertain as to the direction of the next attack. Private F.G.J. George fired a Hedgehog salvo at the rapidly diving boat, but no hits were registered. Or the crippled sub may have sunk so rapidly after being hit that water pressure crushed its hull, setting off its torpedo warheads. [1] Satisfactory trials of the device were carried out in May 1941, and the weapon was then put to good use by the Royal Navy against the German U-boat menace. At 2:33, the order was given to “fire Hedgehogs!” Twelve seconds after splashing the water, four of the deadly missiles exploded. The individual projectiles are merely cosmetic. Minutes later, George turned on her searchlight and swept the area. ... Hedgehog . The Hedgehog (also known as an Anti-Submarine Projector) was a forward-throwing anti-submarine weapon that was used primarily during the Second World War.The device, which was developed by the Royal Navy, fired up to 24 spigot mortars ahead of a ship when attacking a U-boat. Anti-submarine mortar AUGR m90 001.jpg. Bull’s-eye! Two minutes later, a violent underwater explosion erupted astern of England, lifting her clear off the water. 35mm. As in the other cases, it was believed that the submarine had been crippled, and the crew committed hara-kiri by deliberately detonating its warheads. The first ahead-throwing ASW weapon in British service, the Hedgehog scattered 24 contact-fused charges over an area. Upon reaching their designated position, the DEs steamed in a parallel line about 4,000 yards apart. Pendleton headed for the center of the explosion site. Escort Division 39 received orders to patrol an area northwest of Buin to try to intercept the enemy vessel. Photo by Royal Navy official photographer. Enemy submarines will be automatically detected when they come within range of Anti-Submarine Warfare (ASW) Vanguard Fleet ships (Destroyers and Light Cruisers). These all had the common characteristic of throwing multiple charges ahead of the attacking vessel, while it was still in sonar contact. The odds appeared even except for two factors—the arrival of a squadron of new U.S. Navy destroyer escorts (DEs) and the infamous Hedgehog weapons with which they were armed. Lane of The Highland Light Infantry of Canada milking Rosie, one of the cows who was trapped between German and Canadian lines in Normandy, France, 20 June 1944. The Japanese submarine might have been severely damaged, and the captain could have set off a detonation device that destroyed his ship. Please consider giving a credit hyperlink to https://www.goodfreephotos.com if you use the photos on this site using the attribution code in the below box. Personnel loading a Hedgehog anti-submarine mortar during sea trials aboard the corvette H.M.C.S. In the Spring of 1944, Japanese Admiral Soemu Toyoda assembled a large fleet of warships at Tawi-Tawi in the southern Philippine Islands. The Hedgehog and similar Spigot Mortars were extremely effective ASW weapons and far better than depth charges but it required ASDIC to achieve that efficiency. Photograph released October 1945. Anti-submarine mortars are artillery pieces deployed on ships for the purpose of sinking submarines by a direct hit with a small explosive charge. At 7 o’clock, the George picked up the submarine (RO-104) on sonar and dashed to the attack. At the same time, the Allied warships that escorted convoys were equipped with a new weapon that was more effective than depth charges: the Hedgehog anti-submarine mortar, which fired barrages of a few dozen mortars from the front of the ship. 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