The Delfinen-class submarines were the first class of submarines constructed for the Royal Danish Navy following World War II. They were designed and built within Denmark, with first three boats of the class financed by Denmark. The fourth was financed by the United States (where it was known as SS-554) under the Cost Share program. Constructed between 1956 and 1963, the class comprising four submarines (, , and ) entered service in 1961 and the last taken out of service in 1990. Replaced by the Norwegian , three of them were scrapped while a fourth was converted into a museum ship and remains on display at the Aalborg Maritime Museum.
Description
The Delfinen class had a standard displacement of and when submerged. They measured long with a beam of and a draught of . The submarines were propelled by two shafts powered by two B&W diesel engines and two BBC electric motors. The submarines had a maximum speed of both surfaced and submerged and a range of at . The submarines were equipped with passive and active sonar and a schnorkel. The Delfinen class were armed with four torpedo tubes located in the bow.