noun
half watch ashore; port and starboard liberty
Naval term: shore leave granted to half of a ship's crew at a time, while the other half remains on duty. Used in military or maritime contexts.
今日は半舷上陸で、乗組員の半分が上陸を許された。
Today was half watch ashore, and half of the crew was allowed to go ashore.
Since the time for port and starboard liberty is limited, everyone hurried to get ready.