Deer Trail/Agate area (Denver Mode C veil + Class B legend) · 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, which includes the chart's own "Examples of Class B Altitudes" box showing "70" over "30." According to this legend, what does a Class B shelf printed this way mean?
Why: The chart's own legend box states plainly: "Ceiling in hundreds of feet MSL" (the top number) and "Floor in hundreds of feet MSL" (the bottom number). For the worked example of "70" over "30," that is a ceiling of 7,000 feet MSL and a floor of 3,000 feet MSL.
Misreads "hundreds of feet" as the raw number itself — 70 hundred is 7,000, not 70,000.
The chart's legend specifies both numbers are in MSL, not AGL — Class B shelf altitudes are always referenced to mean sea level, not height above the ground below.
UA.II.A.K1 · Source: Denver.pdf, current edition sectional chart excerpt, "Examples of Class B Altitudes" legend box (gitignored full-resolution source; not redistributed — see sources/README.md) · Reviewed 2026-10-22