Archives of Nethys

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Terrestrial Vehicles | Starships


Starship Examples

Armor | Armor (Bulkheads) | Armor (Hulls) | Base Frames | Computers | Crew Quarters | Defensive Countermeasures | Drift Engines | Expansion Bays | Interstellar Drives | Manufacturers | Other Systems | Power Cores | Security | Sensors | Shields | Special Materials | Thrusters | Weapons | Weapon Properties


Expansion Bays

Source Starfinder Core Rulebook pg. 298
Most starships have room within their hull for one or more expansion bays, each of which can be converted to function in a wide variety of roles. Unfilled, these bays are simply storage space (and count as cargo holds), and for many large transport vessels, they remain this way. If a starship’s bays are instead used for guest quarters, the ship can serve as a transport vessel for soldiers, travelers, or refugees. If its bays are filled with medical bays and guest quarters, the ship becomes a mobile hospital.

The following options are available for most ships that have available expansion bays. If an option requires multiple bays, this is noted in its description; if it must consume PCU to function, the amount is listed in the table on page 300. An entire expansion bay must be used for a single purpose, even if it gives you multiple instances of that option. For example, if you select escape pods, that expansion bay gains all six escape pods—you can’t combine three escape pods and one life boat.

The PCU requirement and the Build Point costs of the expansion bay options can be found on page 300.

External Expansion Bay

Source Starship Operations Manual pg. 25
PCU 0; Cost (in BP) 3
A starship can increase its number of expansion bays by attaching additional modules to its exterior or towing them. The additional mass and volume of external expansion bays reduce the starship’s maneuverability; increase the turn distance of a starship by 1 for every three external expansion bays it has, rounded up. External expansion bays can be installed only on a Small or larger starship, and the number of external expansion bays cannot exceed the number of expansion bays provided by the starship’s base frame.