Torped 613

Torped 613 (TP613) is a heavyweight torpedo still in use by the Swedish Navy. It is wire-guided and has a passive sonar sensor that sends back information through the wire. The torpedo was developed in the 1970s as a cooperation project between Denmark, Norway and Sweden. Testing was done during the period 1981-1983.

Like the older Swedish Torped 61 introduced in the mid-1960s, it is driven by alcohol and hydrogen peroxide, which gives long range and a minimum exhaust trail.

The torpedo is planned to be replaced by the more modern Torped 62.

Short history of the TP61-series torpedoes:
 * TP61, ca 1970 (developed from several previous HTP-propulsioned torpedoes starting in 1955): Straightrunning anti-surface torpedo for use with submarines and surface vessels.
 * TP611: Wire-guided version of the TP61.
 * TP612: Further development of the TP611 with "swim-out" launch from submarine tubes and improved noise-profile.
 * TP618, ca 1980: Export version of the TP612 (increased speed and less noise-reduction).
 * TP613, ca 1982: Development of the TP612 with passive-hydrophone target-seeker and pistol. Two-way data communications, and engine with two speeds which could be changed during the run.
 * TP617, ca 1982: Export version of the TP613, identical, with some degraded parameters in software for hydrophone-control and pistol giving it a slightly reduced performance.