緊きん急きゅう浮ふ上じょう訓くん練れん

noun

emergency surfacing drill (submarine)

Technical term used in naval and submarine contexts for a drill practicing rapid ascent to the surface in an emergency.

• 潜せん水すい艦かんの乗のり組くみ員いんは定てい期き的てきに緊きん急きゅう浮ふ上じょう訓くん練れんを行おこなう。

  The submarine crew regularly conducts emergency surfacing drills.