homing torpedo
Noun
Meaning
a torpedo that is guided to its target (as by the sound of a ship's engines)
Source: WordNetSynonyms
Hypernyms
Examples
A homing torpedo also needs to be able to outmanoeuvre a target.
Late in World War II, the U.S. adopted a convert homing torpedo (known as "Cutie" ) for use against escorts.
The weapons available to airships were so limited that until the advent of the homing torpedo they had little chance of sinking a submarine.