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.

Torped 613 (TP613)
Type	Heavyweight torpedo
Place of origin	Sweden
Service history
In service	1983–present (Torped 613)
Used by	Sweden, Norway, Denmark, Poland, Singapore
Production history
Manufacturer	Förenade fabriksverken (FFV)
Specifications
Mass	C.a 1800 kg
Length	7 m
Width	533 mm
Diameter	533 mm
Effective firing range	20 km
Warhead	high explosive
Warhead weight	300 kg
Detonation mechanism	proximity fuze
Engine	piston engine
Propellant	Alcohol and Hydrogen peroxide
Guidance system	Wire guided and controlled homing
Launch platform	Submarines, MTBs, shore batteries

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.