Visibility Table
| Scale | Description | Limit of visibility |
|---|---|---|
| 0 | Dense fog | 50 yards |
| 1 | Thick fog | 300 yards |
| 2 | Fog | 600 yards |
| 3 | Moderate fog | ½ mile |
| 4 | Mist or thin fog | 1 mile |
| 5 | Poor visibility | 2 miles |
| 6 | Moderate visibility | 5 miles |
| 7 | Good visibility | 10 miles |
| 8 | Very good visibility | 30 miles |
| 9 | Exceptional visibility | over 30 miles |