The torpedo was electric and had an effective range of 5,700 metres (6,200 yd) at a speed of 24 knots (44 km/h; 28 mph). This torpedo employed acoustic, passive homing to find its target after a straight run of 400 metres (440 yd). This evolution of the G7es torpedo was created to counter the Allies' Foxer noise-maker countermeasure.