{HEAD ~ Both axes} of {TAIL ~ the gimbal} have a combination of auxiliary generator and motor with a locking mechanism 
{ HEAD ~ Both axes } of { TAIL ~ the gimbal } have a combination of auxiliary generator and motor with a locking mechanism
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH