A binary file may have two groups of variables: those belonging to a set of history records, and non-record variables. The record variables may have different values in each record. The records are labeled by (optional) time and cycle numbers:
jt, time advance all open record files to record nearest
time
jt, f, time advance file f to record nearest
time
jc, f, ncyc advance file f to record nearest
ncyc
get_times(f) return list of record times
get_ncycs(f) return list of record cycles