William H Morse State Airport traffic pattern

Pattern altitude at William H Morse State Airport (DDH · KDDH) is 1,800 ft MSL (≈1,000 AGL) by the standard convention — none is published for this field, and 31 is charted right traffic.

All of William H Morse State 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 KDDH reports it.

RWY 13LEFT traffic

Heading: 132° mag · 118° true
Dimensions: 3,704 × 75 ft
TPA: 1,800 ft MSL (≈1,000 AGL) · standard
Surface: Asphalt
Lights: 4-light PAPI (left) (4°)
CTAF: 122.8

Enter the left downwind (heading 312°) on the 45° at 1,800 ft MSL (≈1,000 AGL).

More details — RWY 13

Threshold elev: 793 ft
Markings: nonprecision
Approach obstacle: Hill, 170 ft, 3,100 ft from threshold, 425 ft L/R of centerline — 17:1 slope to clear · penetrates the 20:1 visual approach surface
Threshold crossing height: 45 ft
TDZ elevation: 818 ft
End lights: REIL

Condition: Fair. Edge lights: Med. Weight bearing: Single wheel 12.5k.

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
13	Left traffic	132° mag	1,800 ft MSL (≈1,000 AGL)
31	Right traffic	312° mag	1,800 ft MSL (≈1,000 AGL)

No pattern altitude is published for KDDH; 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 KDDH

William H Morse State Airport is non towered, so the pattern is self announced on CTAF 122.8. 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: 31. 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 KDDH?

William H Morse State 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 KDDH have right traffic?

Yes, on one runway end: 31. Every other end at William H Morse State Airport is standard left traffic.

What frequency is the pattern on at KDDH?

William H Morse State Airport is non towered, so pattern position reports go on the CTAF, 122.8. AC 90-66B asks for self announcing on entry and on each leg.

More about KDDH

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.