[citation needed] The design was a development of the French Nord Aviation CT20 target missile and was manufactured by Saab.

The Royal Swedish Naval Materiel Administration experimented in the 1950s with the development of an anti-ship missile, with the project name M20.

Therefore, in 1962 the Naval Materiel Administration directed Saab to develop an anti-ship version of Nord Aviation's CT20 target missile.

Final production took place in the Nord Aviation factory of Méaulte (Somme) before components were sent to be reassembled in Sweden.

The active radar homing system took control at about 15 km (9.3 mi) from the target, diving into a ship where a contact fuze would detonate the 250 kg (550 lb) High Explosive fragmentation warhead.