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The Mark 32 can fire 12.75-inch (324 mm) torpedoes of the Mark 44, Mark 46, Mark 50 (from the Mod 17 tubes onwards), [3] [4] and Mark 54 [citation needed] designs, and can be modified to use other torpedoes (such as the MU90 Impact aboard Royal Australian Navy frigates, or Royal Navy units using Sting Ray torpedoes).
The Mark 32 was withdrawn from service use with the introduction of the Mark 43 torpedo. Ten were manufactured by Leeds & Northrup , Philadelphia during War II, and about 3,300 were manufactured by a combination of the Philco Corporation , Philadelphia, and the Naval Ordnance Plant , Forest Park, Illinois .
Armament: 100 mm Mod68 CADAM polyvalent artillery piece, 1 Phalanx CIWS, 2 × 3 12.75-inch Mk 32 torpedo tubes, 2 Mk 141 quad-pack Launcher for RGM-84 Harpoon, 1 Mk 21 Guided Missile Launching System for 8 RIM-7 Sea Sparrow; Powerplant: 2 General Electric LM2500 gas turbines; Speed: 32 knots; Ships in class: 3; Operator: Portuguese Navy
This block is one of three displacements, 302/327/350, that underwent a crankshaft bearing diameter transformation for 1968 when the rod-journal size was increased from the 2 in (50.8 mm) diameter small-journal to a 2.1 in (53.3 mm) large-journal and a main-journal size that was increased from 2.3 in (58.4 mm) to 2.45 in (62.2 mm).
The Knox-class ships were armed with a 5"/54 caliber Mark 42 gun forward and a single 3"/50 caliber gun aft. They mounted an eight-round ASROC launcher between the 5-inch (127 mm) gun and the bridge. Close-range anti-submarine defense was provided by two twin 12.75-inch (324 mm) Mk 32 torpedo tubes.
As built, the decoy system comprises Two BAE Systems Shield Mark 2 decoy launchers which fire chaff to 2 kilometres (1.2 mi) and infrared rockets to 169 metres (185 yd) in distraction, confusion and centroid seduction modes. The torpedo decoy is the AN/SLQ-25A Nixie towed acoustic decoy from Argon ST. The ship's radar warning receiver, the ...
Also for ASW purposes, two triple Mk 32 torpedo tubes for the Mk 46 ASW torpedo were installed. These cruisers were initially converted into all-missile warships with no naval guns, but later on, two open-mount Mk 24 5-inch (127 mm) 38 calibre guns were added to the port side and the starboard side, near their aft exhaust stacks.
The Knox-class ship was armed with a single 5-inch (127 mm)/54 caliber Mark 42 gun. It mounted an eight-round ASROC launcher between the 5-inch gun and the bridge. Its close-range anti-submarine defense was provided by two twin 12.75-inch (324 mm) Mk 32 torpedo tubes.