The modular spacecraft 10, wherein {HEAD ~ said top coupling mechanism} coupled to {TAIL ~ said top forward adapter section} comprises an active common berthing mechanism 
The modular spacecraft 10 , wherein { HEAD ~ said top coupling mechanism } coupled to { TAIL ~ said top forward adapter section } comprises an active common berthing mechanism
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH