| 27 | Material protection, external |
| 276 | Galvanizing, nickel plating, metallizing |
| 278 | External cathodic protection |
| 28 | Material protection, internal |
| 288 | Internal cathodic protection |
| 443 | Painting equipment, scaffolding, paint rafts/boats (gigs) |
| 52 | Internal deck covering, ladders, steps, railing |
| 53 | Ext. deck covering, ladders, steps, fore, aft gangway |
| 63 | Propellers, transmissions, foils |