The array may be mounted on a wrist based computer, or be mounted to a computer secured to {HEAD ~ an article} of {TAIL ~ standard scuba gear} 
The array may be mounted on a wrist based computer , or be mounted to a computer secured to { HEAD ~ an article } of { TAIL ~ standard scuba gear }
OTH OTH OTH OTH OTH OTH OTH 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 TAIL