James Bishop identifies the following MULVFS data as blanks:

 cruise   event      sta   cast   depth
--------------------------------------
 TT007    03071800   15    13     740m
 TT011    09012140    9    24     835m
 TT011    09062120   11    26     514m
 TT011    09100155   12    27.2   237m
 TT011    09141720   15    28     750m