| Fixed Aids to Navigation | 0 | Default, AtoN Type Not Specified |
| Fixed Aids to Navigation | 1 | Reference Point |
| Fixed Aids to Navigation | 2 | Radar Beacon (RACON) |
| Fixed Aids to Navigation | 3 | Fixed Offshore Structures, e.g. Oil Platforms, Wind Farms (this code denotes obstructions equivalent to AtoN AIS stations) |
| Fixed Aids to Navigation | 4 | Spare, Reserved for Future Use |
| Fixed Aids to Navigation | 5 | Light, Non-Sector |
| Fixed Aids to Navigation | 6 | Sector Light |
| Fixed Aids to Navigation | 7 | Front Light |
| Fixed Aids to Navigation | 8 | Rear Light |
| Fixed Aids to Navigation | 9 | Beacon, Cardinal North (N) |
| Fixed Aids to Navigation | 10 | Beacon, Cardinal East (E) |
| Fixed Aids to Navigation | 11 | Beacon, Cardinal South (S) |
| Fixed Aids to Navigation | 12 | Beacon, Cardinal West (W) |
| Fixed Aids to Navigation | 13 | Beacon, Port-hand |
| Fixed Aids to Navigation | 14 | Beacon, Starboard-hand |
| Fixed Aids to Navigation | 15 | Beacon, Preferred Channel Port-hand |
| Fixed Aids to Navigation | 16 | Beacon, Preferred Channel Starboard-hand |
| Fixed Aids to Navigation | 17 | Beacon, Isolated Danger |
| Fixed Aids to Navigation | 18 | Beacon, Safe Water |
| Fixed Aids to Navigation | 19 | Beacon, Special Mark |
| Floating Aids to Navigation | 20 | Cardinal North (N) Beacon |
| Floating Aids to Navigation | 21 | Cardinal East (E) Beacon |
| Floating Aids to Navigation | 22 | Cardinal South (S) Beacon |
| Floating Aids to Navigation | 23 | Cardinal West (W) Beacon |
| Floating Aids to Navigation | 24 | Port-hand Beacon |
| Floating Aids to Navigation | 25 | Starboard-hand Beacon |
| Floating Aids to Navigation | 26 | Preferred Channel Port-hand |
| Floating Aids to Navigation | 27 | Preferred Channel Starboard-hand |
| Floating Aids to Navigation | 28 | Isolated Danger |
| Floating Aids to Navigation | 29 | Safe Water |
| Floating Aids to Navigation | 30 | Special Mark |
| Floating Aids to Navigation | 31 | Lightship/LANBY (Large Automated Navigation Buoy) / Drilling Platform |