To define a record sequential file with fixed-length records:
file-control. select recseq assign to "recseq.dat" organization is record sequential. ... file section. fd recseq record contains 80 characters. 01 recseq-fd-record pic x(80).
You could simply use ORGANIZATION IS SEQUENTIAL, as record sequential is the default for sequential files, as long as the SEQUENTIAL Compiler directive is not set.