Port Alsworth traffic pattern
Pattern altitude at Port Alsworth (TPO) is 1,300 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 24R is charted right traffic. · Open on the map
All of Port Alsworth — runways, frequencies, charts and live weatherPattern 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 TPO reports it.
RWY 06LLEFT traffic
- Heading
- 060° true
- Dimensions
- 3,000 × 100 ft
- TPA
- 1,300 ft MSL (≈1,000 AGL) · standard
- Surface
- DIRT-GRVL
- CTAF
- 122.9
Enter the left downwind (heading 240°) on the 45° at 1,300 ft MSL (≈1,000 AGL).
More details — RWY 06L
- Threshold elev
- 260 ft
- Markings
- none
- Approach obstacle
- Trees, 400 ft from threshold — 50:1 slope to clear
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 |
|---|---|---|---|
| 06L | Left traffic | 60° true | 1,300 ft MSL (≈1,000 AGL) |
| 24R | Right traffic | 240° true | 1,300 ft MSL (≈1,000 AGL) |
No pattern altitude is published for TPO; 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 TPO
Port Alsworth is non towered, so the pattern is self announced on CTAF 122.9. AC 90-66B asks for a report on entry and on each leg, and for the standard 45° entry to downwind at pattern altitude.
Watch the right traffic ends here: 24R. 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 TPO?
Port Alsworth 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 1,300 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 TPO have right traffic?
Yes, on one runway end: 24R. Every other end at Port Alsworth is standard left traffic.
What frequency is the pattern on at TPO?
Port Alsworth is non towered, so pattern position reports go on the CTAF, 122.9. AC 90-66B asks for self announcing on entry and on each leg.
More about TPO
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.
Something here wrong or out of date? Report a data problem.