OVERVIEW: The Tp 612 is a heavyweight, submarine-launched wire-guided torpedo developed by Sweden in the mid-1970s for anti-ship engagement. It introduced a quieter “swim‑out” launch method and retained the high-performance HTP propulsion of its predecessor.

DETAILS: “Tp” stands for Torped. The Tp 612 is a further development of the Tp 611, entering service in 1976 and featuring a swim‑out launch system that expelled the torpedo quietly from the tube before its engine ignited. It maintains a 533 mm diameter, HTP/ethanol piston engine capable of exceeding 50 kn, and carries a 250 kg warhead with proximity and impact fuzes. Wire guidance allows for mid-course corrections, and it is acoustically Active homing in the terminal phase. It can engage surface targets up to 10 km away, offering improved stealth and performance over earlier variants.

TYPE: Heavyweight Wire-Guided Anti-Ship Torpedo

FUNCTION: The Tp 612 is launched from 533 mm submarine tubes using a quiet swim‑out method. It travels under wire guidance during the mid-course phase, then transitions to terminal acoustic homing to engage surface ship targets.

NOTE:
IOC: 1976 (Tp 612)
Manufacturer: Sweden (Förenade Fabriksverken / Saab Bofors Underwater Systems)
Operators: Sweden
Platforms: Swedish submarines (A‑class types equipped for HTP torpedoes)
Conflict used in: None confirmed

SOURCE:
Jane’s Naval Weapons Systems “Torpedoes, Sweden Tp 61/Tp 62 series” – https://www.torp.esrc.unimelb.edu.au/bib/P00001340.htm ; Naval-Encyclopedia “Halland class destroyer” – https://naval-encyclopedia.com/cold-war/sweden/halland-class-destroyer.php ; cmano‑db “Tp 612 (1976, Submarine, Anti‑Ship)” – https://cmano-db.com/weapon/1454/