![]() ![]() Myōkō was also equipped with an aircraft catapult and carried up to three floatplanes for scouting purposes. Her secondary armament included eight 12.7 cm/40 Type 89 naval guns in four twin mounts on each side, and 12 Type 93 Long Lance torpedoes in four triple launchers positioned below the aircraft deck. Myōkō’s main battery was ten 20 cm/50 3rd Year Type naval guns, the heaviest armament of any heavy cruiser in the world at the time, mounted in five twin turrets. ![]() The ship was armored with a 102 mm (4 in) side belt, and 35 mm (1 in) armored deck, but the bridge was not armored. Propulsion was by 12 Kampon boilers driving four sets of single-impulse, geared-turbine engines, with four shafts turning three-bladed propellers. The Myōkō class displaced 13,500 t (13,300 long tons), with a hull design based on an enlarged version of the Aoba-class cruiser. During modifications and rebuildings in the 1930s, though, the final displacement rose to 15,933 tons, well over the treaty limits. Naval architect Vice Admiral Yuzuru Hiraga was able to keep the design from becoming dangerously top-heavy in its early years by continually rejecting demands from the Imperial Japanese Navy General Staff for additional equipment to the upper decks. Myōkō was approved under the 1922–1929 Fleet Modernization Program, as the first heavy cruiser to be built by Japan within the design constraints imposed by the Washington Naval Treaty, and was the first of the "10,000 ton" cruisers built by any nation. The other ships of the class were Nachi, Ashigara, and Haguro. She was named after Mount Myōkō in Niigata Prefecture. Myōkō ( 妙高) was the lead ship of the four-member Myōkō class of heavy cruisers of the Imperial Japanese Navy (IJN), which were active in World War II. Myōkō in Singapore at the end of World War II:: Submarines I-501 and I-502 are tied up alongside. ![]()
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