| 30 | Hatches, ports |
| 303 | Cargo tank hatches |
| 304 | Smaller hatches, grain hatches, manhole covers |
| 311 | Loose decks and platforms for cargo, ramps |
| 374 | Vent./gas freeing systems for tanks, wind sails w/equipment |
| 51 | Insulation, panels, bulkheads, doors, sidescuttles,skylights |
| 52 | Internal deck covering, ladders, steps, railing |
| 53 | Ext. deck covering, ladders, steps, fore, aft gangway |
| 601 | Diesel engines |
| 651 | Motor aggregates |
| 79 | Automation systems for machinery |