The O 21 class was a class of seven submarines, built for the Royal Netherlands Navy. The boats were still incomplete at the start of the German invasion...

The Sang-O ("Shark") class of submarines (Hangul: 상어급 잠수함) are diesel-electric coastal submarines in service with the Korean People's Navy, the navy of...

The United States Navy (USN)'s sixteen O-class coastal patrol submarines were built during World War I and served the USN from 1918 through the end of...

class (or Triton class) of diesel-electric submarines was designed in the 1930s to replace the O, P, and R classes. Fifty-three members of the class were...

O-class submarine may refer to: United States O-class submarine Oberon-class submarine Odin-class submarine Several early submarine classes of the Royal...

class was, with the British S Class and T class submarines, the Dutch O 21 class and German Type VII class one of the most advanced submarine classes...

The Virginia class, or the SSN-774 class, is the newest class of nuclear-powered cruise missile fast attack submarines in service with the United States...

The O 19 class was a class of two submarines, built for the Royal Netherlands Navy by Fijenoord, Rotterdam. The ships were designed as submarine minelayer...

O 21, laid down K XXI was an O 21-class submarine of the Royal Netherlands Navy that saw service during World War II. During the war she sank several...

locomotive NSB Class 21, Norwegian 2-6-0 steam locomotive O 21-class submarine P21-class patrol vessel PKP class ET21 South African Class 21 2-10-4, South...

The Odin-class submarine (or "O class") was a class of nine submarines developed and built for the Royal Navy (RN) in the 1920s. The prototype, Oberon...

The Scorpène-class submarines are a class of diesel-electric attack submarines jointly developed by the French Naval Group (formerly the DCNS) and the...

the S class was together with the British U and T class, Dutch O 21 class and German Type VII class one of the most advanced submarine classes in service...

UD-4 was an O 21-class submarine. The boat was laid down as the Dutch submarine HNLMS K XXVI and renamed HNLMS O 26 but was captured during German invasion...

The Riachuelo class are a Brazilian class of diesel-electric and nuclear-powered attack submarines developed by the state-owned shipyard Itaguaí Construções...

Balao class was a design of United States Navy submarine used during World War II, and with 120 boats completed, the largest class of submarines in the...

United States O 21-class submarine, of the Royal Netherlands Navy HNLMS O 21, a submarine of this class O21 scale, a model railway scale Otoyol 21, a motorway...

UD-3 was an O 21-class submarine. The boat was laid down as the Dutch submarine HNLMS K XXV and renamed HNLMS O 25 but was captured during the German...

The Yugo-class submarine is a class of four midget submarines used primarily for infiltration and espionage by North Korea. The Yugo class was given its...

and K submarines used for colonial service. O1-class submarine O 1 O 2-class submarine O 2 O 3 O 4 O 5 O 6-class submarine O 6 O 7-class submarine O 7 German...

USS O-9 (SS-70) was an O-class submarine of the United States Navy. O-9′s keel was laid down on 15 February 1917 at Fore River Shipbuilding Company of...

The KSS-III (Korean Submarine-III; Korean: 한국형 잠수함-III; Hanja: 韓國型潛水艦-III), officially called Dosan Ahn Changho class (Korean: 도산안창호급 잠수함; Hanja: 島山安昌浩級潛水艦;...

The Collins-class submarines are Australian-built diesel-electric submarines operated by the Royal Australian Navy (RAN). The Collins class takes its name...

The list of submarine classes in service includes all submarine classes currently in service with navies or other armed forces worldwide. For surface...

fast second-rate anti-submarine frigates in the 1950s. The O and P class were based on the hull and machinery of the preceding J class, but with more sheer...

Mackerel-class submarines were a pair of experimental prototype submarines built just prior to World War II and launched in 1940 and 1941. The two submarines were...

The Sargo-class submarines were among the first United States submarines to be sent into action after the Japanese attack on Pearl Harbor, starting war...

Hai Kun-class submarine (Chinese: 海鯤級潛艦, translation "Narwhal"), alternatively known as the Indigenous Defense Submarine (IDS) program, is a class of attack...

O 23, laid down as K XXIII, was an O 21-class submarine of the Royal Netherlands Navy that saw service during World War II. During the war she sank and...

The O 12-class submarine consisted of four submarines built for the Royal Netherlands Navy. The ships, with a diving depth of 60 metres (200 ft), were...