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The K-gun, standardized in 1942, replaced the Y-gun as the primary depth charge projector. The K-guns fired one depth charge at a time and could be mounted on the periphery of a ship's deck, thus freeing valuable centerline space. Four to eight K-guns were typically mounted per ship.
Until depth-finding sonar became available (the first was the Royal Navy's Q attachment in 1943), there was a "dead period" during the final moments before a depth-charge attack began when contact with the target would be lost. U-boat commanders became adept at sharp course changes and direction speed at these moments to break contact and escape.
8 × K-gun depth charge projectors 2 × depth charge tracks USS Solar (DE-221) (pronounced sō-lär), a Buckley -class destroyer escort of the United States Navy , was named in honor of Boatswain's Mate First Class Adolfo Solar (1900–1941), who was killed in action during the Japanese attack on Pearl Harbor on 7 December 1941.
1 × depth charge projector (Hedgehog type) USS Thomas J. Gary (DE-326) was an Edsall -class destroyer escort . The ship was renamed Thomas J. Gary on 1 January 1945 to free the name for planned light cruiser USS Gary (CL-147) .
Her two signal guns that were directly forward of the bridge were replaced with a single 3-inch 50 caliber gun. Her two 5-inch 51 caliber main batteries remained unchanged. Campbell was the first Secretary-class cutter to transfer for duty with the Navy (on 1 July 1941) and the first to sail on escort of convoy duties when she escorted Convoy ...
This weapon was a three-barrel 12-inch (305 mm) mortar with the mortars mounted in series but off-bore from each other in order to scatter the projectiles. The barrels were mounted in a frame that could be rotated through 90 degrees for loading. The projectiles weighed 390 pounds (177 kg) with a 207-pound (94 kg) minol charge.
The Ukuru class was initially armed with 120 depth charges with two Type 94 depth charge projectors, sixteen Type 3 depth charge throwers and two depth charge chutes at the stern. The ships were provided with a Model 93 sonar and a Type 93 hydrophone; later units received the Type 3 Model 2 sonar, and some would later receive an 8 cm (3 in ...
Gun mount control panel (GMCP) – Backup interface for the GCC. Velocimeter – A Doppler radar system directly above or next to the gun barrel that measures each fired projectile's initial velocity (IV). The GMP uses the IV data for ballistic solution corrections. Velocimeter of 5"/54 caliber Mk 45 gun aboard USS The Sullivans ADSU of Mk 46 ...