A Torpedo is a self-propelled weapon with an explosive warhead, launched above or below the water surface, propelled underwater towards a target, and designed to detonate either on contact with its target or in proximity to it. In the Star Fox series, the Blue-Marine is armed with a Homing Torpedo launcher, able to fire an unlimited supply of "Light Bomb" underwater based projectiles that can be locked onto its target with the use of a Targeting Computer, in place of Charged Lasers. The submersible has one weakness, and this is the fact that its visual sensors were not designed to work in the darkness of great depths; it was instead designed to use sonar. Therefore, in order to see clearly in the murky abyss, the Blue-Marine must use "Light Bomb" torpedoes, of which it has an unlimited supply. The launch time between each Torpedo is however slow, therefore it leaves the Blue-Marine vulnerable against oncoming enemies until the previous shot has hit its target.
During the Lylat Wars, Torpedoes were put to tremendous use during the battle of Aquas against the sea creatures and the bioweapon Bacoon. The Illegally Modified Research Vessel, known as Sarumarine, was armed with it's own Torpedo Launchers.
“The Blue-Marine's torpedo launcher uses top-secret technology to generate its own supply of ammunition.”