noun
torpedo
Refers specifically to self-propelled underwater weapons launched from ships, submarines, or aircraft. Often used in military contexts.
See also: 魚雷
潜水艦が水雷を発射した。
The submarine launched a torpedo.
noun
sea mine; underwater mine
Refers to stationary explosive devices placed in water to damage or destroy ships. Distinct from torpedoes (魚雷).
See also: 機雷
湾内に水雷が敷設された。
Sea mines were laid in the bay.