log

  PI:              Chief Scientists: John Marra 119-4; Hugh Ducklow 119-5
  dataset:         Cruise Event/Operation Log
  dates:           Leg 4: 4/25/89 - 5/10/89, Leg 5: 5/15/89 - 6/8/89
  project/cruise:  North Atlantic Bloom Experiment
  ship:            R/V Atlantis II legs 4 and 5
  

  Parameter               Description                              Units

  year                    year of event in the form (YYYY); 
                          added by DMO, February 2009
  date                    date of event in the form (YYYYMMDD); 
                          added by US JGOFS DMO, November 2002
  sta                     station number, new with each day
  cast                    operation number, numbered 
                            consecutively within station
  event                   unique number assigned to each cast      MMDDhhmm
                            consisting of the month, day, hour, 
                            minutes (MMDDhhmm) of sampling event
  lat                     latitude, minus = south                  decimal degrees
  lon                     longitude, minus = west                  decimal degrees
  activity_and_comments   operation performed/sampling method