4-1-1. ALTITUDE AND DISTANCE LIMITATIONS

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  • 4-1-1. ALTITUDE AND DISTANCE LIMITATIONS

    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.)

    TBL 4-1-1 VOR/VORTAC/TACAN NAVAIDs
    Normal Usable Altitudes and Radius Distances
    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
    TBL 4-1-2 L/MF Radio Beacon (RBN)
    Usable Radius Distances for All Altitudes
    Class Power (watts) Distance (miles)
    CL Under 25 15
    MH Under 50 25
    H 50 - 1,999 50
    HH 2000 or more 75
    TBL 4-1-3 ILS Usable Height and Distance*
    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.
    FIG 4-1-1 Application of Altitude and Distance Limitations [Application 1]
    FIG 4-1-1
    FIG 4-1-2 Application of Altitude and Distance Limitations [Application 2]
    FIG 4-1-2
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