naval mine

(military) An explosive device placed in the water and intended to destroy or deter vessels.

Japanese Meaning

船舶を破壊または威嚇する目的で、水中に設置される軍事用の爆発装置

The coastal patrol reported a floating naval mine drifting toward the harbor, prompting an immediate evacuation.

沿岸警備隊は、港に向かって漂流する浮遊機雷を報告し、直ちに避難が実施された。

Sense（1）

(military) An explosive device placed in the water and intended to destroy or deter vessels.

The ship hit a naval mine and sank with all hands.

naval mines

（ plural ）