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# WOD98 - BIOLOGICAL HEADER VARIABLES
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  1 Water volume                     m3
  2 Sampling duration                minutes
  3 Mesh size                        micrometer
  4 Type tow                         file: towtype.txt
  5 Large removed volume             min. volume of ind. removed, in ml
  6 Large removed                    large plankters removed:1=yes,2=no
  7 Gear code                        file: gear.txt
  8 sampler volume                   liters
  9 net mouth area                   m2
 10 Preservation                     file: preserv.txt
 11 Weight method                    file: wtmeth.txt
 12 Large removed length             min. length of ind. removed, in cm
 13 Count method                     file: cntmeth.txt
 14 Tow distance                     tow distance in meters
 15 Tow speed avg                    average tow speed in knots
 16 Sampling start time              time, decimal hours (GMT)
 17                                  (NOT USED)
 18 Flowmeter type                   file: gear.txt
 19 Flowmeter calibration            file: flowcal.txt
 20 Counting Institution             file: inst.txt
 21 Voucher Institution              file: inst.txt
 22 Wire angle start                 degrees
 23 Wire angle end                   degrees
 24 Depth determined                 file: depthdet.txt
 25 Volume method                    file: volumeth.txt