Walrus Submarine

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The Walrus-class submarine is the only submarine class currently in operation in the Royal Netherlands Navy. They have been in service since 1990 and are all named after sea mammals.

The Walrus-class submarines are unusual in that instead of a cross-shaped assembly of stern diving planes and rudders, they mount four combined rudders and diving planes in an "X" configuration. This tail configuration was first tested in 1960 on the United States Navy's USS Albacore, and has since been used by the Walrus class, all Swedish Navy submarines since the Sjöormen class, the Royal Australian Navy's Collins class, the German Type 212A and the Japan Maritime Self-Defense Force's Sōryū class.

B-17G Flying Fortress 'A Bit O' Lace'

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The Boeing B-17 Flying Fortress is a four-engine heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Competing against Douglas and Martin for a contract to build 200 bombers, the Boeing entry outperformed both competitors and exceeded the air corps' performance specifications. Although Boeing lost the contract because the prototype crashed, the air corps ordered 13 more B-17s for further evaluation. From its introduction in 1938, the B-17 Flying Fortress evolved through numerous design advances.

Tank Panzer Haubitze 2000

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In the early 20th century, the introduction of howitzers that were significantly larger than the heavy siege howitzers of the day made necessary the creation of a fourth category, that of "super-heavy siege howitzers". Weapons of this category include the famous Big Bertha of the German Army and the 15-inch (381 mm) howitzer of the Royal Marine Artillery. These large howitzers were transported mechanically rather than by teams of horses. They were transported as several loads and had to be assembled at their firing position.

Kapal Perang RM Conte De Cavour

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The Conte di Cavour–class battleships were a group of three dreadnoughts built for the Royal Italian Navy (Regia Marina) in the 1910s. The ships were completed during World War I, but none saw action before the end of hostilities. Leonardo da Vinci was sunk by a magazine explosion in 1916 and sold for scrap in 1923. The two surviving ships, Conte di Cavour and Giulio Cesare, supported operations during the Corfu Incident in 1923. They were extensively reconstructed between 1933 and 1937 with more powerful guns, additional armor and considerably more speed than before.

Both ships participated in the Battle of Calabria in July 1940, when Giulio Cesare was lightly damaged. They were both present when British torpedo bombers attacked the fleet at Taranto in November 1940, and Conte di Cavour was torpedoed. She was grounded with most of her hull underwater and her repairs were not completed before the Italian surrender in September 1943. Conte di Cavour was scrapped in 1946. Giulio Cesare escorted several convoys, and participated in the Battle of Cape Spartivento in late 1940 and the First Battle of Sirte in late 1941. She was designated as a training ship in early 1942, and escaped to Malta after Italy surrendered. The ship was transferred to the Soviet Union in 1949 and renamed Novorossiysk. The Soviets also used her for training until she was sunk when a mine exploded in 1955. She was scrapped in 1957.

Kapal Perang HMS Warspite

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Seven ships of the Royal Navy have been named Warspite. The origins of the name are unclear, although it is probably a pun on the word 'spite', in part embodying contempt for the Navy's enemies, but also the common name for the green woodpecker, suggesting the 'Warspite' would poke holes in enemy ships' (wooden) hulls. Until 1919 a woodpecker was used as the ships' crest; the official badge was a cannon, although the woodpecker continued to be used on the ships' tompions or gun muzzle plugs.