The G7e T4 (Falke) was a German 21 inch passive homing torpedo used by submarines of the Second World War, entering service in 1943. Its homing was by a simple noise measurement and the torpedo was intended for use against merchant ships. It had a range of 7500 metres and travelled at a speed of 20 knots. It was armed with a 200 kg Hexanite explosive warhead. Research G7e T4
 
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