A ship station (or ship radio station) is a radio station located onboard a sea vessel. The ITU Radio Regulations define it as "A mobile station in the maritime mobile service located on board a vessel which is not permanently moored, other than a survival craft station."
Each station is classified by the service in which it operates, permanently or temporarily.
- ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.77, definition: ship station / ship radio station