test depth

uncountable usually

(nautical, military) The maximum depth at which a submarine is permitted to operate in peacetime.

Japanese Meaning

平時に潜水艦が運用できる最大の水深を指す。

Before the final sea trials, the captain briefed the crew on the submarine's test depth and emergency procedures.

最終海上試験の前に、艦長は乗組員に潜水艦の平時に許可された最大潜航深度と緊急時の手順について説明した。

Sense（1）

(nautical, military) The maximum depth at which a submarine is permitted to operate in peacetime.

test depths

（ plural ）