IMCA

The examples, provided on page 13 of CG-4602A, for recording oil residue (sludge) collected by manual operation utilize the incorrect item number, “C12”.
Collection of oil residue (sludge) by manual operation should instead be recorded with code/number “C11”.

https://www.dco.uscg.mil/Portals/9/DCO%20Documents/5p/MSIB/2025/MSIB_03-25%20INTERIM%20GUIDANCE%20FOR%20OIL%20RECORD%20BOOK.pdf