| A | B |
|---|
| Approach Visibility | Distance a pilot can see over the nose of the airplane towards the ground |
| RVR | Distance a pilot will be able to see the lights or other delineating markers along the runway |
| Ceiling | any cloud cover of 5/8 or more |
| Overcast | 7/8 to 8/8 cloud cover |
| Broken Clouds | 5/8 to 7/8 cloud cover |
| SKC or CLR | No Clouds |
| FEW | Clouds are less than 2/8 of sky |
| Scattered Clouds | 3/8 to 4/8 of sky cover. |
| Ground Visibility | Visibility at airport reported by accredited observer. |
| Flight Visibility | Average forward visibility from an aircraft in flight. |
