External Expansion Bay
Bays
0
Sizes
S, M, L, H, G, C, Sc
PCU
0
Cost
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.
Source
Starship Operations Manual pg. 25
