She also carried four T5 Zaunkönig acoustic homing torpedoes.

Capable of carrying dropping sonobouys or acoustic homing torpedoes on direction of other anti-submarine assets.

Acoustic homing torpedoes are equipped with a pattern of acoustic transducers on the nose of the weapon.

ES5C: Export version of Type 035/035A, with updated fire control system to launch acoustic homing torpedoes.

A more lasting benefit came from the intact capture of the U-boat's two G7es (Zaunkönig T-5) acoustic homing torpedoes.

Perhaps most damaging of all, the Allies recovered U-505's G7es acoustic homing torpedoes, which were extensively reverse engineered to improve the Allied Foxer decoy system.

Foxer, was the codename for a British built acoustic decoy, used to confuse German acoustic homing torpedoes like the G7es torpedo during the Second World War.

Its auto-hover capabilities enhanced the illusion by making it an exceptionally stable hovering platform, even with two Mark 46 acoustic homing torpedoes slung under an external weapons station on the port side.

Two Soviet advisors were assigned to assist China to produce the RAT-52 rocket-powered torpedo, while others were assigned to teach China about compressed oxygen and SAET-60 passive homing acoustic homing torpedoes.