noun
Specifically refers to a person who boards or is on a ship. Not used for trains, planes, or other vehicles.
フェリーの乗船者は全員無事だった。
All passengers on the ferry were safe.
乗船者名簿に名前を記入してください。
Please write your name on the passenger list.
Also means 'ship passenger', but 乗船者 is more common in official contexts like passenger lists.
Compound of 乗船 (じょうせん, 'boarding a ship') + 者 (しゃ, 'person').