year  cruise_id  lat      lon      event     sample  date        tow       
2009  Nghza-09   20.2167  58.7500  04250901  01      4/25/2009   surface   
2009  Nghza-09   20.2167  58.7500  04260902  02      4/26/2009   surface   
2009  Nghza-09   20.2167  58.7500  04270903  03      4/27/2009   surface   
2009  Nghza-09   20.2167  58.7500  04270904  04      4/27/2009   vertical  
2009  Nghza-09   20.2167  58.7500  04280905  05      4/28/2009   surface   
2009  Nghza-09   20.2167  58.7500  04290906  06      4/29/2009   surface   
2009  Nghza-09   20.2167  58.7500  05020907  07      5/2/2009    surface   
2009  Nghza-09   20.2167  58.7500  05030908  08      5/3/2009    surface   
2009  Nghza-09   20.2167  58.7500  05040909  09      5/4/2009    surface   
2009  Nghza-09   20.2167  58.7500  05050910  10      5/5/2009    surface   
2009  Nghza-09   20.2167  58.7500  05060911  11      5/6/2009    surface   
2009  Nghza-09   20.2167  58.7500  05080912  12      5/8/2009    surface   
2009  Nghza-09   20.2167  58.7500  05090913  13      5/9/2009    surface   
2009  Nghza-09   20.2167  58.7500  05100914  14      5/10/2009   surface   
2009  Nghza-09   20.2167  58.7500  05110915  15      5/11/2009   vertical  
2009  Nghza-09   20.2167  58.7500  05110916  16      5/11/2009   surface   
2009  Nghza-09   20.2167  58.7500  05120917  17      5/12/2009   surface   
2009  Nghza-09   20.2167  58.7500  05130918  18      5/13/2009   surface   
2009  Nghza-09   20.2167  58.7500  05160919  19      5/16/2009   surface   
2009  Nghza-09   20.2167  58.7500  05170920  20      5/17/2009   surface   
2009  Nghza-09   20.2167  58.7500  05180921  21      5/18/2009   surface   
2009  Nghza-09   20.2167  58.7500  05190922  22      5/19/2009   surface   
2009  Nghza-09   20.2167  58.7500  05200923  23      5/20/2009   surface   
2009  Nghza-09   20.2167  58.7500  05230924  24      5/23/2009   surface   
2009  Nghza-09   20.2167  58.7500  05240925  25      5/24/2009   surface   
2009  Nghza-09   20.2167  58.7500  05250926  26      5/25/2009   surface   
2009  Nghza-09   20.2167  58.7500  05260927  27      5/26/2009   surface   
2009  Nghza-09   20.2167  58.7500  05260928  28      5/26/2009   vertical  
2009  Nghza-09   20.2167  58.7500  05270929  29      5/27/2009   surface   
2009  Nghza-09   20.2167  58.7500  05310930  30      5/31/2009   surface   
2009  Nghza-09   20.2167  58.7500  06010931  31      6/1/2009    surface   
2009  Nghza-09   20.2167  58.7500  09070937  37      9/7/2009    surface   
2009  Nghza-09   20.2167  58.7500  09080938  38      9/8/2009    surface   
2009  Nghza-09   20.2167  58.7500  09150939  39      9/15/2009   surface   
2009  Nghza-09   20.2167  58.7500  09160940  40      9/16/2009   surface   
2009  Nghza-09   20.2167  58.7500  09240942  42      9/24/2009   surface   
2009  Nghza-09   20.2167  58.7500  10070945  45      10/7/2009   surface   
2009  Nghza-09   20.2167  58.7500  10080946  46      10/8/2009   surface