- Verify that a high level alarm is installed on the sludge tank.
- Il residue for oil sludge tank not accordance with oil record book.
- Fore peak tank, fresh water tank, ballast tank, emergency generator fuel oil tank use sounding pipe, sludge tank use short sounding pipe.
- Sludge tank with floating trough
- He is siphoning out petrol from a tank.
- There was some sludge at the bottom of the tank.