HNoMS "Æger" was a launched at Karljohansvern naval shipyard in Horten in 1936. The "Sleipner" class was part of a Norwegian rearmament scheme started as war became ever more likely in the 1930s. When the Germans invaded Norway on 9 April 1940, "Æger" intercepted and sank the clandestine German supply ship . She was shortly afterwards attacked and sunk by German bombers, claiming two of the attacking aircraft with her anti-aircraft armament before being taken out of action by a heavy bomb.