USAF Academy Alert Area A-260 and Colorado Springs Class C · Denver Sectional, 3 Sep 2026 – 29 Oct 2026 · Denver.pdf (FAA current sectional, not redistributed), p. 1 · Not for navigation
Refer to the current Denver sectional excerpt near Black Forest, Colorado. An obstruction there, labeled "TOWER," is charted as "7910 (322)." What is its top elevation above mean sea level (MSL)?
Why: The unparenthesized number in a charted obstruction's data is always its top elevation above mean sea level: 7,910 feet MSL here. The parenthesized 322 is its height above ground level (AGL), a separate reading.
322 is the obstruction's AGL height (the parenthesized figure), not its MSL elevation.
Invents an addition (7,910 + 322) that isn't how the chart presents the data — the MSL elevation is printed directly as 7,910, with no arithmetic needed.
UA.II.B.K7 · Source: Denver.pdf, current edition sectional chart excerpt (gitignored full-resolution source; not redistributed — see sources/README.md) · Reviewed 2026-10-22