Sectional chart reference

Obstacle / tower

Obstacle symbol with two heights.

Obstacle / tower as printed on a VFR sectional chart: Obstacle symbol with two heights. The illustration shows the obstruction symbol, with the taller figure the height above sea level and the bracketed figure the height above the ground. 1849 (1149)
Drawn to the depiction described in the FAA Aeronautical Chart Users’ Guide, effective 9 July 2026. Illustrative, not to scale, and not for navigation.

What you are looking at

Top number = height MSL; number in parentheses = height AGL. Tall towers (>=1,000 ft AGL) use a larger symbol.

Part 107 at 400 ft Nothing to request, but see and avoid
Source: depiction per the FAA Aeronautical Chart Users’ Guide, effective 9 July 2026 (PDF).

What that verdict means here

There is no authorization associated with this symbol. It is on the chart so that you know the thing is there.

⚠️ § 107.41, the ATC-authorization rule quoted on the Class B, C, D and E-surface pages, is not the rule that governs this symbol, which is why it is not quoted here.

Find one near you

Reading about a symbol is not the same as finding it. Open the live chart, put in your own address, and see what is actually there.

Open the live chart
Not for navigation. Study material, not authority. This page explains a chart symbol for study. It is not an authorization source and not a substitute for an official pre-flight check. Confirm on the FAA’s own chart viewer and through LAANC before you fly.