4-1-1
Altitude and Distance Limitations
JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov
When specifying a route other than an established airway or route, do not exceed the limitations in the table on any portion of the route which lies within controlled airspace. (For altitude and distance limitations, see TBL 4-1-1, TBL 4-1-2, and TBL 4-1-3) (For correct application of altitude and distance limitations see FIG 4-1-1 and FIG 4-1-2.)
| Class | Altitude | Distance (miles) |
|---|---|---|
| T | 12,000 and below | 25 |
| L | Below 18,000 | 40 |
| H | Below 14,500 | 40 |
| H | 14,500 - 17,999 | 100 |
| H | 18,000 - FL 450 | 130 |
| H | Above FL 450 | 100 |
| Class | Power (watts) | Distance (miles) |
|---|---|---|
| CL | Under 25 | 15 |
| MH | Under 50 | 25 |
| H | 50 - 1,999 | 50 |
| HH | 2,000 or more | 75 |
| Height (feet) above transmitter | Distance (miles from transmitter) |
|---|---|
| 4,500 | 10 (for glideslope) |
| 4,500 | 18 (for localizer) |
| *Use the current flight check height/altitude limitations if different from the above minima. | |
