unidentified submerged objects

form-of plural

plural of unidentified submerged object

Japanese Meaning

未確認水中物体

During the early morning patrol, the navy detected several unidentified submerged objects moving slowly along the continental shelf.

早朝の哨戒中、海軍は大陸棚に沿ってゆっくりと移動する数個の正体不明の水中物体を検出しました。

Sense（1）

plural of unidentified submerged object