guns. Depth charge storage was also increased, from 30 to 46 charges. Furthermore, the class initially had problems with leaks in feedwater tanks; this was traced to issues with the turbine blades caused by structural stress when steaming at high speed in rough weather. By 1944, the four surviving British Tribals were given a tall lattice foremast to carry a Type 293 radar target indication and Type 291 air warning, with Type 285 radar added to the rangefinder-director. The first two Canadian built Tribals, Micmac and Nootka, were armed with the then standard armament of three 4.7-inch twin mountings and a single twin 4-inch mount, with the 4.7-inch mounts being given improved A.A. fuze setters, while the last two Canadian-built Tribals were equipped with eight Mark XVI guns with R.P.C. and four to six Bofors 40 mm guns as standard, along with a Mk VI Director. Post-war modifications Post war, survivors of the class met different fates: Royal Navy Tribals were retired by the 1950s, while Tribals in service with the Australian and Canadian navies continued in service, with many refitted as anti-submarine destroyers. The British-built Canadian Tribals landed their 4.7-inch guns, and received a pair of 4-inch Mark XVI guns in twin mounts in the 'A' and 'B' positions instead, improving anti-aircraft capabilities, a pair of Squid mortars for anti-submarine warfare, and a twin 3 inch/50 Mark 33 gun on the 'X' position as an anti-aircraft weapon. Sensors were also upgraded for their new roles, and as refitted, Canadian Tribals continued to serve until the 1960s. Two of the Australian Tribals, Arunta and Warramunga, were modernised during the early 1950s. The aft-most gun mounting was removed, with the space modified to accommodate a Squid anti-submarine mortar. New sonar and radar units were fitted, the latter requiring the replacement of the tripod radar mast with a stronger lattice structure. Although the modernisation was intended to take less than six months per ship, it took two years for each ship to be refitted, by which time their modifications had already become obsolete. Financial restrictions meant that the third Australian Tribal, Bataan, was not modernised, and a combination of manpower shortages and rapid obsolescence saw all three ships decommissioned by the end of the 1950s. Ships Royal Navy Royal Canadian Navy Royal Australian Navy Service As some of the Royal Navy's most modern and powerful escorts, they were widely deployed in World