USS Hawkbill (SS-366), a Balao-class submarine, was the first ship of the United States Navy to be named for the hawksbill, a large sea turtle.
O 20, laid down as K XX, was a O 19-class submarine of the Royal Netherlands Navy that saw service during World War II. O 20 along with her sister ship O 19 were the first boats in the world to be equipped with a submarine snorkel that allowed the submarine to run its diesel engines while submerged.
O 19, laid down as K XIX, was an O 19-class submarine of the Royal Netherlands Navy that saw service during World War II. O 19, along with her sister ship O 20, were the first submarines in the world to be equipped with a submarine snorkel that allowed the submarine to run its diesel engines while submerged.
HNLMS K X was one of the three K VIII-class submarines of the Royal Netherlands Navy, built to serve as a patrol vessel in the Dutch colonies.
HNLMS O 16 was a submarine of the Royal Netherlands Navy that saw service during World War II. She was the first submarine of the RNN manufactured from high-quality Steel 52, with the ability to dive at a depth of 80 metres (260 ft).
O 24, laid down K XXIV was an O 21-class submarine of the Royal Netherlands Navy that saw service during World War II. The most famous occupant of O-24 was Piet de Jong, who was the commanding officer from 1944 until 1946 and who later became Minister of Defence in 1963 and served as Prime Minister of the Netherlands from 1967 until 1971.
O 13 was an O 12-class submarine of the Royal Netherlands Navy that saw service during World War II. She was built by the Koninklijke Maatschappij De Schelde of Vlissingen. She was one of many Dutch ships doing convoy duty during the Spanish Civil War. At the time of the German invasion of the Netherlands, O 13 was on patrol off the Dutch coast and was attacked by German planes on multiple occasions. After fleeing to England, the submarine was lost during a patrol on the North Sea.
O 4 was an O 2 class patrol submarine of the Royal Netherlands Navy. The ship was built by De Schelde shipyard in Flushing, Netherlands.
HNLMS O 7 was a unique patrol submarine of the Royal Netherlands Navy for use in the home waters of Europe. The ship was built by the Maatschappij Fijenoord shipyard in Rotterdam. The submarines diving depth was 40 metres. O 6 was very similar to the O 7 and they are sometimes regarded as one class.
K V was a K V-class patrol submarine of the Royal Netherlands Navy. The ship was built by Fijenoord shipyard in Rotterdam.
K VI was a K V-class patrol submarine of the Royal Netherlands Navy. The ship was built by Fijenoord shipyard in Rotterdam.
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 ships, among them the German submarine U-95.
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 damaged several ships.
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 invasion of the Netherlands in World War II and commissioned in the Kriegsmarine.
UD-5 was an O 21-class submarine. The boat was laid down as the Dutch submarine HNLMS K XXVII and renamed HNLMS O 27 but was captured during the German invasion of the Netherlands in World War II and commissioned in the Kriegsmarine. The ship survived the war and was returned to the Netherlands where she served under her old name until 1959.
O 11 was a O 9-class patrol submarines of the Royal Netherlands Navy. The ship was built by Fijenoord shipyard in Rotterdam.
O 9 was an O 9-class patrol submarines of the Royal Netherlands Navy. The ship was built by Koninklijke Maatschappij De Schelde shipyard in Flushing.
O 10 was a O 9-class patrol submarines of the Royal Netherlands Navy. The ship was built by Nederlandsche Scheepsbouw Maatschappij shipyard in Amsterdam.
K XIII was a K XI class patrol submarine of the Royal Netherlands Navy. The ship was built by Fijenoord shipyard in Rotterdam.
K XVII was one of five K XIV-class submarines built for the Royal Netherlands Navy. She served during World War II.
Netherlands
