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