San Nicolas Island Nolf Airport traffic pattern

Pattern altitude at San Nicolas Island Nolf Airport (NSI · KNSI) is 1,500 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 30 is charted right traffic.

All of San Nicolas Island Nolf Airport — runways, frequencies, charts and live weather

Pattern diagram

Drawn to scale from the FAA NASR runway alignments and the per end right traffic flags — pick a runway to see its pattern. Live wind picks the favored runway when KNSI reports it.

RWY 12LEFT traffic

Heading: 121° mag · 133° true
Dimensions: 10,002 × 200 ft
TPA: 1,500 ft MSL (≈1,000 AGL) · standard
Surface: PEM
Displaced thr: 992 ft

More details — RWY 12

Threshold elev: 485 ft
Markings: nonprecision
TDZ elevation: 498 ft
Declared TORA/TODA/ASDA/LDA: — / — / — / 9,010 ft

Edge lights: High. PCN 63.

Pattern side + displaced threshold: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
12	Left traffic	121° mag	1,500 ft MSL (≈1,000 AGL)
30	Right traffic	301° mag	1,500 ft MSL (≈1,000 AGL)

No pattern altitude is published for KNSI; the figure above is the AC 90-66B 1,000 ft AGL convention for propeller aircraft, rounded to the field. Turbine aircraft normally fly 1,500 ft AGL. Headings are the runway alignment; downwind is the reciprocal.

Flying the pattern at KNSI

San Nicolas Island Nolf Airport is towered, working 126.85. Contact the tower before entering the surface area and fly the pattern you are assigned — the directions below are the charted default when no instruction is given.

Watch the right traffic ends here: 30. A right pattern at a field where the other end is left is the single most common place to end up pointing at opposing traffic. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at KNSI?

San Nicolas Island Nolf Airport has no traffic pattern altitude published in the FAA NASR data. The AC 90-66B convention for propeller aircraft is 1,000 ft AGL, which works out to roughly 1,500 ft MSL (≈1,000 AGL) here — but confirm it against the Chart Supplement before you fly, since a field can have a non standard pattern altitude that NASR does not carry.

Does KNSI have right traffic?

Yes, on one runway end: 30. Every other end at San Nicolas Island Nolf Airport is standard left traffic.

Do I fly a standard pattern at KNSI?

San Nicolas Island Nolf Airport is towered (126.85), so the pattern shown here is the charted default — but the controller's instruction overrides it. Expect straight in approaches, base entries and midfield crossings as traffic dictates.

More about KNSI

Pattern direction and alignment are drawn from the FAA NASR (28-day cycle); the diagram is generated, not an FAA chart. Pattern altitude is shown as published where NASR carries one, otherwise as the AC 90-66B 1,000 ft AGL convention. For planning and education only; always verify against the Chart Supplement.