Buoys and Lights
| Symbol | Meaning |
|---|---|
| F | Fixed |
| Oc | Single-occulating |
| Oc(2) | Group-occulating |
| Oc(2+3) | Composite group-occulating |
| Iso | Isophase |
| Fl | Single-flashing |
| Fl (3) | Group-flashing |
| Fl (2+1) | Composite group-flashing |
| L FL | Long-flashing (flash 2s or longer) |
| Q | Continuous quick |
| Q (3) | Group quick |
| IQ | Interrupted quick |
| VQ | Continuous very quick |
| VQ (3) | Group very quick |
| IVQ | Interrupted very quick |
| UQ | Continuous ultra quick |
| Mo (K) | Morse code flash pattern of the given letter |
| F Fl | Fixed and Flashing |
| ALWR | Alternating (colors given) - Alternating white and red |