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Subclass VK
| VK1-1661 | Navigation. Merchant marine | ||
| VK15-124 | History, conditions, etc. | ||
| VK321-369.8 | Harbors. Ports | ||
| VK381-397 | Signaling | ||
| VK401-529 | Study and teaching | ||
| VK549-572 | Science of navigation | ||
| VK573-587 | Nautical instruments | ||
| VK588-597 | Marine hydrography. Hydrographic surveying | ||
| VK600-794 | Tide and current tables | ||
| VK798-997 | Sailing directions. Pilot guides | ||
| VK1000-1249 | Lighthouse service | ||
| VK1250-1299 | Shipwrecks and fires | ||
| VK1299.5-1299.6 | Icebreaking operations | ||
| VK1300-1491 | Saving of life and property | ||
| VK1500-1661 | Pilots and pilotage | ||
