code_name,Digitization interval units,NODC code 0613 01,FIXED INTERVAL LE 0.1 METER AND LE 0.1 DEG C 02,FIXED INTERVAL GT 1 METER BUT LE 3 METERS AND LE 0. 1 DEG C 03,FIXED INTERVAL GT 3 METERS BUT LE 6 METERS AND LE 0 .1 DEG C 04,FIXED INTERVAL GT 6 METERS AND LE 0.1 DEG C 11,FIXED INTERVAL LE 1 METER AND LE 0.2 DEG C 12,FIXED INTERVAL GT 1 METER BUT LE 3 METERS AND LE 0. 2 DEG C 13,FIXED INTERVAL > 3 METERS AND <= 6 METERS AND <= 0.2DEG C 31,VARIABLE INTERVAL - MANUALLY DETERMINED 32,VARIABLE INTERVAL - STATISTICALLY DETERMINED 33,VARIABLE INTERVAL - PHYSICALLY DETERMINED 34,FXED INTERVAL GT 3 METERS BUT LT 6 METERS AND LE 0.2 DEG C