Johnston Airport traffic pattern

Pattern altitude at Johnston Airport (9IS9) is 1,800 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and every runway end is standard left traffic. · Open on the map

All of Johnston 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 9IS9 reports it.

RWY 26LEFT traffic

Heading: 260° true
Dimensions: 2,100 × 70 ft
TPA: 1,800 ft MSL (≈1,000 AGL) · standard
Surface: TURF

Enter the left downwind (heading 080°) on the 45° at 1,800 ft MSL (≈1,000 AGL).

Pattern side: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: schematic (headings + lengths)

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
08	Left traffic	—	1,800 ft MSL (≈1,000 AGL)
26	Left traffic	—	1,800 ft MSL (≈1,000 AGL)

No pattern altitude is published for 9IS9; 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 (true — magnetic variation unavailable); downwind is the reciprocal.

Flying the pattern at 9IS9

Johnston Airport is non towered. AC 90-66B asks for a report on entry and on each leg, and for the standard 45° entry to downwind at pattern altitude.

All ends are left traffic, which is the FAR 91.126 default — turns to the left unless the field charts otherwise. The full entry procedure is here →

Frequently asked

What is the traffic pattern altitude at 9IS9?

Johnston 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 1,800 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 9IS9 have right traffic?

No. All 2 runway ends at Johnston Airport use standard left traffic, so no right pattern is charted here.

More about 9IS9

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.