Patuxent River Naval Air Station (Trapnell Field) traffic pattern

Pattern altitude at Patuxent River Naval Air Station (Trapnell Field) (NHK · KNHK) is 1,000 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and every runway end is standard left traffic.

All of Patuxent River Naval Air Station (Trapnell Field) — 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 KNHK reports it.

RWY 14LEFT traffic

Heading: 136° mag · 126° true
Dimensions: 9,732 × 200 ft
TPA: 1,000 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt

More details — RWY 14

Threshold elev: 27 ft
Markings: precision
TDZ elevation: 27 ft
Arresting gear: E28

Condition: Good. Edge lights: High. PCN 67.

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

Pattern direction by runway

Runway	Pattern	Heading	Pattern altitude
02	Left traffic	018° mag	1,000 ft MSL (≈1,000 AGL)
20	Left traffic	198° mag	1,000 ft MSL (≈1,000 AGL)
06	Left traffic	059° mag	1,000 ft MSL (≈1,000 AGL)
24	Left traffic	239° mag	1,000 ft MSL (≈1,000 AGL)
14	Left traffic	136° mag	1,000 ft MSL (≈1,000 AGL)
32	Left traffic	316° mag	1,000 ft MSL (≈1,000 AGL)

No pattern altitude is published for KNHK; 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 KNHK

Patuxent River Naval Air Station (Trapnell Field) is towered, working 123.7. 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.

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 KNHK?

Patuxent River Naval Air Station (Trapnell Field) 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 1,000 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 KNHK have right traffic?

No. All 6 runway ends at Patuxent River Naval Air Station (Trapnell Field) use standard left traffic, so no right pattern is charted here.

Do I fly a standard pattern at KNHK?

Patuxent River Naval Air Station (Trapnell Field) is towered (123.7), 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 KNHK

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.