The system includes communications electronics adapted to provide {HEAD ~ radio communication} with {TAIL ~ remote communications units}, which are capable of maintaining an independent ledger of transaction history 
with
The system includes communications electronics adapted to provide { HEAD ~ radio communication } with { TAIL ~ remote communications units } , which are capable of maintaining an independent ledger of transaction history
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH