Synchronization may be facilitated by receipt of {HEAD ~ a reference time event} such that {TAIL ~ a clock} is synchronized based on the reference time event 
Synchronization may be facilitated by receipt of { HEAD ~ a reference time event } such that { TAIL ~ a clock } is synchronized based on the reference time event
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH