ferry boat [1]
Shuttle boat for carrying vehicles with their cargo and passengers.
compass bridge 
Covered glassed-in platform from which officers and crew navigate the vessel.
radio antenna 
Metal conductor that emits and receives radio waves for communications.
radar 
Detection device that emits radio waves and receives their echo; it is used to avoid collisions and to navigate when visibility is reduced.
heating/air-conditioning equipment 
Machinery that regulates the cabin’s temperature and humidity.
telecommunication antenna 
Multipurpose antenna that receives and transmits various signals such as video, telephone and digital.