| 355 | Loading/discharging systems for lpg/lng in gaseous phase |
| 362 | Freezing and refrigerating systems for dry cargo |
| 554 | Freezing/refrigerating systems for provisions |
| 584 | Drinking water systems and coolers |
| 7 | Systems for machinery main components |
| 70 | Fuel systems |
| 71 | Lube oil systems |
| 722 | Fresh water and other cooling systems |