Docking port size compatibility

[MAFman]

Can docking ports of different sizes dock together?

[Stamp20]

No.

[jimmymcgoochie]

Each docking port size is only compatible with others of the same size. In stock KSP:

• In the 0.625m size category you get the Clamp-O-Tron Junior and the Making History inflatable airlock (yes, that's a docking port too, but only when inflated);
• For 1.25m, Clamp-O-Tron docking ports- normal, shielded and inline in 1.25m and Mk2 fuselage variants;
• For 2.5m, Clamp-O-Tron Senior.

Plenty of mods add docking ports, from the tiny Pico Ports to the gigantic 5m (and 7.5m?) docking ports from Near Future Launch Vehicles, but they're all size-dependent and can only dock to something of the same size. Some mod docking ports (e.g. in Near Future Construction and Pico Port) also have orientation constraints and will only let you dock if you're at a specific angle e.g. 90 degree increments, which makes orbital construction a lot easier as you don't have to dock everything at precisely the right angle. Stock docking ports now have the ability to rotate up to 15 degrees each, which can help with aligning things to build larger structures- or just to make everything neat and symmetrical; or to put it another way, perfectly balanced as all things should be.

[fleventeen]

It is worth noting that while you cannot dock different sized ports in stock KSP, there is a mod which adds universal docking ports which do make this possible.

 

[Maria Sirona]

NO. The Sun is a deadly lazer. (Sorry)