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