2B1 Cape Cod

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. No weather observation available.

certainty: — evidence: NONE no tower now

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27 17% 2700 ft

9 17% 2700 ft

17 16% 2060 ft

23 16% 2035 ft

35 16% 2060 ft

5 16% 2035 ft

Why — evidence behind this answer

Runway 27

PRIOR runway length 2700 ft +0.04

Runway 9

PRIOR runway length 2700 ft +0.04

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	UNAVAILABLE		No weather observation found
ADSB	WARMING_UP	435 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)

Was this right?

2B1 field & runways

Cape Cod, Marston Mills, Massachusetts. Field elevation 103 ft. Non-towered (NON-ATCT). Magnetic variation 16.0°W on record, 14.0°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 0.069°/year east — about 1° every 14 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
17	154.3°	168.3°	matches rule gives runway 16 in ~48 yr	2,060 ft	TURF	left
23	213.6°	227.7°	matches rule gives runway 22 in ~38 yr	2,035 ft	TURF	left
27	252.4°	266.4°	matches rule gives runway 26 in ~20 yr	2,700 ft	TURF	left
35	334.3°	348.3°	matches rule gives runway 34 in ~48 yr	2,060 ft	TURF	left
5	33.6°	47.7°	matches rule gives runway 4 in ~38 yr	2,035 ft	TURF	left
9	72.4°	86.4°	matches rule gives runway 8 in ~20 yr	2,700 ft	TURF	left

Generated 09:14:48Z · auto-refreshes · JSON

2B1 ☆ Cape Cod