noun, noun which may take the genitive case particle 'no'
on-board ship; inside a ship; inboard
Refers to the interior of a ship or something located/occurring within a ship. Often used with の to modify nouns.
There are restaurants and a pool on board the ship.
There is a restaurant and a pool inside the ship.
船内アナウンスによると、まもなく出港するそうだ。
According to the onboard announcement, we will depart soon.
A small fire broke out on board the ship.
The staff gave us a tour of the inside of the ship.
船内 means inside the ship, while 船外 means outside the ship.
intercom; intercommunication system
Compound of 船 (ship) and 内 (inside).