#	Using BREAK and SORTCUT to recut ensembles without reordering traces
#	The result is the same as in the preceding example, but
#	we do not have to handle the built-in trace header LASTTR explicitly.
#	Also, SORTCUT will change the trace sequence number (header SEQNO),
#	which is not affected by BREAK.


*call	break	trace	espnum	break	# set break=1 whenever espnnum
					# (shot location in SEG-Y) changes

*call	sortcut	break			# subdivide the flow into shot ensembles