The Marineville Hospital is located in Marineville, not far from the Control Tower, and serves the medical needs of the entire base. It is one of the most up to date and well equipped hospitals in the world.
The building is completely soundproofed from the nearby Airbase, and also can descend with the rest of the base into the underground silo. There are a total of 25 ambulances stationed around Marineville, ten of which are at the Ambulance Bay of hospital.
Troy Tempest ended up in the hospital for a feigned illness so that he wouldn't have to join Admiral Jack Denver on his galleon voyage. Admiral Denver later would end up at the hospital due to a head wound (Set Sail For Adventure).