Vehicles, like weapons, can be utilized on combat in multiple ways. The most conventional is utilizing land vehicles to hit opponents. In an instance like this they are equal 5% of the owner’s PL and no more, they cannot be buffed via techniques and if hidden do not offer bonuses to defending against techniques, if the technique overpowers the car it is vaporized. Vehicles used in combat ignore the combat zones and do not used AP unless they have a passenger, in which case the rider(s) may move 2 spaces in one movement rather than 1.
If a vehicle is destroyed in a thread it is returned to the owner without any penalty to the owner.
Spaceships, like vehicles may be used in normal planet bound threads, they may utilize their combat systems and are treated as NPC allies/minions when used in this way. Their weapons gain an additional 5% bonus to their damage when used on Player Characters or planets.
On a related note, if combat is occurring inside of a spaceship while the spaceship is fighting externally, there is no shift to the internal combat scenario unless the spaceship itself is destroyed. However you are free to RP this otherwise as long as all members of the thread affected by it agree.