cruise_id  CTD      date_local  
OC1504A    CTD03    4/20/15     
OC1504A    CTD05    4/21/15     
OC1504A    CTD06    4/23/15     
OC1504A    CTD09    4/24/15     
OC1504A    CTD10    4/25/15     
OC1504A    CTD13    4/26/15     
OC1504A    CTD16    4/27/15     
OC1504A    CTD17    4/28/15     
OC1504A    CTD19    4/29/15     
OC1504A    CTD21    4/29/15     
OC1504A    CTD22    4/30/15     
OC1504A    CTD23    4/30/15     
OC1504A    CTD24    5/1/15      
OC1504A    CTD25    5/1/15