Vehicle Stations

Most vehicles, namely Mekka and Ships, have what are called "Vehicle Stations". These represent the potential for additional tools or weapons to be attached to the vehicle, which can both give the vehicle new features or radically change its intended use, whether it's for warfare, work, or general support. 
The rules for stations are simple: anything that can be connected to a vehicle or structure can be considered a vehicle station. This includes siege weapons and some special items obtained from different craftsmen, like alchemizers, refineries, and shield hubs. The options available to you are detailed on the Workshops page. 
Unless otherwise noted, all vehicle stations are Large objects with an AC of 18, 50 hit points, and immunity to poison and psychic damage. Unless targeted directly, a vehicle station is not considered to be the target of an attack, but can still be included in areas of effect. 
Huge stations take two station points to connect, so if a vehicle can only fit one vehicle station, it cannot fit a Huge station. Likewise, a Gargantuan object takes four stations. Huge or Gargantuan siege weapons must be fit above deck - they cannot fit in a vehicle's steerage deck, if it has one.