A cargo bay is a part which can contain other equipment.
The main use is to store unwieldy or unstackable parts (such as a small probe) within a larger structure. It doesn't shield the parts from aerodynamic drag (0.25[outdated]), currently. The size of the cargo bay cannot be used completely - the docking devices needs some place, and the room of the cargo bays has no regular shape.
To open and close the doors, right-click the cargo bay, and push the Open/Close button. Action groups can also can be used for this purpose; by employing the Toggle Bay Doors command, the doors can be opened and closed by a single keystroke.
List of cargo bays
|Image||Part||Radial size|| Cost
|Mk2 Cargo Bay CRG-04||Mk2||320||0.25||2 500||50||50|| ⌀1.25x1.875 m|
|Mk2 Cargo Bay CRG-08||Mk2||500||0.5||2 500||50||50|| ⌀1.25x3.75 m|
|Mk3 Cargo Bay CRG-25||Mk3||750||1.5||2 700||50||50|| ⌀2.50x2.50 m|
(1⅓ x X200-16)
|Mk3 Cargo Bay CRG-50||Mk3||1 500||3.0||2 700||50||50|| ⌀2.50x5.00 m|
(1⅓ x X200-32)
|Mk3 Cargo Bay CRG-100||Mk3||3 000||6.0||2 700||50||50|| ⌀2.50x10.00 m|
(1⅓ x Jumbo-64)
|Mk3 Cargo Ramp||Mk3||3 000||4.0||2 700||50||50|| ⌀2.50x2.00 m|
|Service Bay (1.25m)||Small||500||0.1||2 900||14||50|| ⌀1.25x0.50 m|
|Service Bay (2.5m)||Large||500||0.3||2 900||14||50|| ⌀2.50x1.10 m|
( ~ X200-8)