2 FORMATS OF DATA - (!) SEISMIC DATA IN SEG FORMAT (A,B,C OR D) OR (2) NAVIGATION DATA IN UK00A TEXT FORMAT. BOTH ARE STORED DIGITALLY ON MAGNETIC TAPES OR DISCS. SEG-A,B AND D ARE RAW SEISMIC FIELD DATA RECORDED BY THE VESSEL/LAND CREW WITH NO DATA PROCESSING APPLIED. SEG-Y DATA HAS HAD SEISMIC PROCESSING APPLIED, IT COULD BE JUST READ IN AND WRITTEN OUT OR A FULL PROCESSING SEQUENCE. UKOOA S CAN BE RAW P2/94 OR PROCESSED P1/90 (OLDER P1/84) SEISMIC DATA USUALLY COMES ON 3590 TAPES

CLASSIFICATION IS DETERMINED BY GENERAL RULES 1 & 6 TOGETHER WITH THE TEXT TO CN CODES 8523, 852329 AND 85232933.