KSET St Charles County Rgnl/Smartt Fld

UNKNOWN

Unknown — not enough evidence to call a runway

We don't know, and saying so beats guessing. 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. Wind calm — no directional preference.

certainty: — evidence: NONE no tower now

Wind calm · VFR · 32 min old · from KSTL (11.0 nm away)

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18 27% 3800 ft

36 27% 3800 ft

27 23% 2000 ft

9 23% 2000 ft

Why — evidence behind this answer

Runway 18

PRIOR runway length 3800 ft +0.06

Runway 36

PRIOR runway length 3800 ft +0.06

Runway 27

PRIOR runway length 2000 ft -0.06

Runway 9

PRIOR runway length 2000 ft -0.06

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	32 min	Nearest station KSTL (11.0 nm away)
ADSB	WARMING_UP	3558 min	Only 0 min of track history so far
NOTAM	OK
CIFP	NOT_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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KSET field & runways

St Charles County Rgnl/Smartt Fld, St Charles, Missouri. Field elevation 437 ft. Non-towered (NON-ATCT). Magnetic variation 1.0°E on record, 1.9°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 0.054°/year west — about 1° every 19 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.
Runway	True	Magnetic	Number	Length	Surface	Pattern
18	180.7°	182.6°	matches rule gives runway 19 in ~45 yr	3,800 ft	ASPH	left
27	270.7°	272.6°	matches rule gives runway 28 in ~44 yr	2,000 ft	ASPH	left
36	0.7°	2.6°	matches rule gives runway 1 in ~45 yr	3,800 ft	ASPH	left
9	90.7°	92.6°	matches rule gives runway 10 in ~44 yr	2,000 ft	ASPH	left

Generated 10:22:38Z · auto-refreshes · JSON

KSET ☆ St Charles County Rgnl/Smartt Fld