noun
smuggling vessel; smuggler ship
Refers to a ship or boat used for smuggling goods. Can also refer to the smuggler vessel itself, but not typically to a person.
沿岸警備隊が密輸船を拿捕した。
The coast guard seized the smuggling vessel.
密航船 is a ship used for stowing away or illegal immigration, whereas 密輸船 is for smuggling goods.
Compound of 密輸 (smuggling) + 船 (ship, vessel).