INSTRUCTIONS FOR CODING THE SURFACE ENVIRONMEIWAL INFORMATION (MASTER CARD) 

 (See Appendix II for sample Physical and Chemical Data Form) 



Columns 1-2 COUNTRY CODE 



Enter the appropriate country code according to Table 1. This field 

 combined with Cruise Number, Columns 73-75, makes up the five-digit NODC 

 Reference Identity Number. Regardless of the ship's registry, the country 

 code should reflect the nationality of the agency sponsoring or operating 

 the vessel for the particular cruise being coded. 



Columns 3-k SHIP CODE 



Do not code this fieldj the proper code will be entered at the NODC. 

 The complete ship name should be entered in the space provided on the coding 

 form; include ICES numeric ship-platform code if available. 



Columns 5-9 LATITUDE 



Enter latitude in degrees and minutes. Enter tenths of minutes, when 

 available, in Column 9. Table 2 converts seconds to tenths of a minute. 

 Enter N or S in the space provided on the data form. 



Columns 10-15 LONGITUDE 



Enter longitude in degrees and minutes. Enter tenths of minutes, when 

 available, in Column I5. Table 2 converts seconds to tenths of a minute. 

 Enter E or W in the space provided on the data form. 



Note on Columns 5-15: For station position use location as first determined 

 on arrival at oceanographic station or at time of release of first messenger. 

 If, in the opinion of the originator, appreciable drift occurred during the 

 period while the station was occupied, it should be indicated by an entry 

 in the Remarks space and a red dash in Column 16 of the coding form. If a 

 red dash is entered in Column 16 of the form, X overpunch Column 15 of the 

 card. 



Columns 16-I8 MARSDEN SQUARE 



No entry is required on the coding form; Marsden square is computed at 

 the NODC from the position coordinates entered in Columns 5-15' A Marsden 

 Square Chart, Table 3, is provided for those originators who wish to enter 

 this information on the coding form for their own records. 



