runwayinuse

KNRB Mayport Ns (Adm David L Mcdonald Fld)

5
PROBABLE 68%

Runway 5 — wind slightly favors it, low confidence

Based mostly on wind; no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. ADS-B tracking just started here — traffic history is still building.

certainty: 68% evidence: NONE Class D

N 5 23

Wind 040° true at 4 kt · VFR · 53 min old · from KCRG (5.6 nm away)

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5 68% 8001 ft · 4 kt head, 0 kt x-left
23 32% 8001 ft · 4 kt TAIL, 0 kt x-right · right traffic
Why — evidence behind this answer

Runway 5

Runway 23

Sources consulted

sourcestatus agenote
D_ATISUNAVAILABLE No D-ATIS at this field
METAROK 53 min Nearest station KCRG (5.6 nm away)
ADSBWARMING_UP 255 min Only 0 min of track history so far
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (Only 0 min of track history so far)

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KNRB field & runways

Mayport Ns (Adm David L Mcdonald Fld), Mayport, Florida. Field elevation 15 ft. Class D airspace. Towered. Private use. Magnetic variation 6.0°W on record, 7.2°W today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.065°/year west — about 1° every 15 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against today's declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
RunwayTrueMagnetic Number LengthSurfacePattern Notes
23 222.8° 229.9° matches 8,001 ft ASPH right
5 42.8° 49.9° matches 8,001 ft ASPH

Generated 09:46:07Z · auto-refreshes · JSON