size of biggest submarine compared to aircraft carrier

In December 1941, construction on Shinano 's hull was temporarily suspended to allow the IJN time to decide what to do with the ship. The ship is only known to have been photographed twice: on 1 November 1944, by a Boeing B-29 Superfortress reconnaissance aircraft from an altitude of 9,800 meters (32,000 ft), and ten days later, by a civilian photographer aboard a harbor tug during Shinano 's initial sea trials in Tokyo Bay. As a result, Shinano was the only major warship built in the 20th century that was never officially photographed during its construction. Serious punishment-up to and including death-awaited any worker who mentioned the new ship.

A tall fence was erected on three sides of the graving dock, and those working on the conversion were confined to the yard compound. Construction and conversion Īs with Shinano 's half-sisters Yamato and Musashi, the new ship's existence was kept a closely guarded secret.

She was laid down on at the Yokosuka Naval Arsenal to a modified Yamato-class design: her armor would be 10–20 millimeters (0.4–0.8 in) thinner than that of the earlier ships, as it had proved to be thicker than it needed to be for the desired level of protection, and her heavy anti-aircraft (AA) guns would be the new 65- caliber 10 cm Type 98 dual-purpose gun, as it had superior ballistic characteristics and a higher rate of fire than the 40-caliber 12.7 cm Type 89 guns used by her half-sisters. One of two additional Yamato-class battleships ordered as part of the 4th Naval Armaments Supplement Program of 1939, Shinano was named after the old province of Shinano, following the Japanese ship-naming conventions for battleships. She remains the largest warship ever sunk by a submarine. Over a thousand sailors and civilians were rescued and 1,435 were lost, including her captain. She was sunk en route, 10 days after commissioning, on 29 November 1944, by four torpedoes from the U.S. Her conversion was still not finished in November 1944 when she was ordered to sail from the Yokosuka Naval Arsenal to Kure Naval Base to complete fitting out and transfer a load of 50 Yokosuka MXY7 Ohka rocket-propelled kamikaze flying bombs. The advanced state of her construction prevented her conversion into a fleet carrier, so the IJN decided to convert her into a carrier that supported other carriers. Laid down in May 1940 as the third of the Yamato-class battleships, Shinano 's partially complete hull was ordered to be converted to an aircraft carrier following Japan's disastrous loss of four of its original six fleet carriers at the Battle of Midway in mid-1942. Shinano ( 信濃) was an aircraft carrier built by the Imperial Japanese Navy (IJN) during World War II, the largest such built up to that time.

12 × 28-barrel 12 cm (4.7 in) AA rocket launchers.8 × twin 12.7 cm (5 in) dual-purpose guns.Sunk by the submarine USS Archerfish, 29 November 1944 Shinano underway during her sea trials in Tokyo Bay

Size of biggest submarine compared to aircraft carrier