FIGS 27 and 28 show {HEAD ~ commands} and statuses used in {TAIL ~ the controller} 100 in detail 
used in
FIGS 27 and 28 show { HEAD ~ commands } and statuses used in { TAIL ~ the controller } 100 in detail
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH