When one or several of the items contained in Columns 66-75 
(bearing, nautical miles drifted, days adrift, and speed) are omitted, 
the information for all these items will be computed at the NODC. To 
identify these NODC-computed values, an x overpunch, generated by the 
computer, is automatically entered in Column 78 of the release-recovery 
card. 
12 
