cruiseid
  date
    gmtyear
    gmtmonth
    gmtday
    gmttime
    lat
    lon
    temp
    sal
    flvolt
    lat2
    lon2
    paws
    saws
    pawa
    sawa
    airtemp
    humidity
    metpress
    ss1temp
    ss5temp
    csdepth
    fspdw
    sspdw
    fspdb
    sspdb
    sldepth
    head
    head2
    mqual
    msmg
    mcmg
    tqual
    tsmg
    tcmg