Of the Sailfish-class with sister ship Sailfish. Displacement 1.990 tons standard, 2.2425 tons surfaced and 3.168 tons submerged and dimensions 350,5 (over all) x 29 x 16,5 (mean) feet and a speed 20,5 knots surfaced and 10 knots submerged. She was ordered 27 February 1952, laid down 10 March 1954, launched 25 February 1956 and completed December 1956. Her crew numbered 95 men. Armed with 6-21” bow torpedo tubes.