The craft is lighter than air, such as a dirigible airship , and has {TAIL ~ flat projection surfaces} on each of {HEAD ~ its sides} 
The craft is lighter than air , such as a dirigible airship , and has { TAIL ~ flat projection surfaces } on each of { HEAD ~ its sides }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD