As the airship moves around the sky the image is visible on {HEAD ~ the exterior} of {TAIL ~ the craft} to observers on the ground 
of
As the airship moves around the sky the image is visible on { HEAD ~ the exterior } of { TAIL ~ the craft } to observers on the ground
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH