| 355 | Loading/discharging systems for lpg/lng in gaseous phase |
| 382 | Tank cleaning systems and equipment |
| 408 | Dynamic positioning systems |
| 444 | Cleaning equipment, garbage chutes |
| 445 | Garbage disposal plants, incinerators |
| 501 | Lifeboats w/equipment |
| 57 | Ventilation, air-conditioning, heating systems |
| 58 | Sanitary syst. w/discharges, accommodation drain systems |
| 581 | Sanitary supply systems |
| 582 | Sanitary discharge systems, accommodation drainage systems |
| 584 | Drinking water systems and coolers |
| 64 | Boilers, steam, gas generators |
| 70 | Fuel systems |
| 722 | Fresh water and other cooling systems |
| 761 | Distilled and make-up water systems |
| 801 | Ballast systems, solid ballast |
| 803 | Bilge systems |
| 867 | Rectifiers and converters |