Whidbey Island Class C, NAS Whidbey and R-6701 · Seattle Sectional, 3 Sep 2026 – 29 Oct 2026 · Seattle.pdf (FAA current sectional, not redistributed), p. 1 · Not for navigation
Refer to the current Seattle sectional excerpt. Whidbey Island NAS (Ault Fld) (NUW) is charted with the data block "CT - 127.9 ... 47 L 80." What is this airfield's field elevation?
Why: Following the frequencies in an airport data block, the elevation figure comes first, then any lighting code, then runway length in hundreds of feet. Here, "47" is Whidbey Island NAS's field elevation in feet, "L" means its runway lighting operates sunset to sunrise, and "80" means its longest runway is 8,000 feet.
80 (in hundreds of feet, i.e., 8,000 feet) is the longest-runway-length figure, not the field elevation.
127.9 is a radio frequency (the control tower frequency, CT), not an elevation — elevation is never expressed as a frequency-style decimal on a sectional chart.
UA.II.B.K3 · Source: Seattle.pdf, current edition sectional chart excerpt (gitignored full-resolution source; not redistributed — see sources/README.md) · Reviewed 2026-10-22