a) Docking ports
For more informations about docking ports, please refer to the “Ships features” section about docking ports.
All ships have docking ports in front of them in order to connect to stations in which they wouldn't otherwise fit ( in the hangars / garages ).
When a docking port opens, an arm ( a cylindrical corridor ) deploys and connects to the station. For the system to work, all stations must also feature docking ports on their hull.
Allowed docking ports range from LMK4 to MK3. Under LMK4, the corridor would be too small for humans to walk; over MK3 is probably overkill.
Remember that some of the ships are truly big. You can easily have Km-sized ships try to dock to your station. You can use arm structures to provide good docking ports coverage.
The number of docking ports in one station should roughly be similar to the number of garages of the same category. See the next section to read more about hangars and garages. Class A garages would match LMK4 docking ports, Class B match LMK5, Class C match MK1, Class D match MK2 and Class E match MK3.
Ex.: You are making a civilian station that is 600m tall.
According to the hangars and garage table “low-traffic”, you'd create 8 class A garages, 6 class B garages, 4 class C garages, 2 class D garages and 0 or 1 class E garage.
Then you'd have to reserve room for 8 LMK4 docking ports, 6 LMK5 docking ports, 4 MK1 docking ports, 2 MK2 docking ports and 0 or 1 MK3 docking ports.