Using the Sectional Chart Legend
This module has covered the most common chart symbols directly, but no course can cover every symbol that might ever appear on a chart. The real skill — and what's actually tested — is knowing how to use the chart legend itself to decode any symbol quickly, since the FAA's own testing supplement containing the full legend is handed to every candidate at the real Knowledge Test.
What the chart legend actually is
A sectional chart's legend is a comprehensive reference sheet defining every symbol, color, and line style used on that chart — airports, airspace boundaries, obstacles, navigation aids, and terrain and cultural features. On a paper chart, condensed legend panels are printed in the chart's margins; a full, detailed legend (called Legend 1 in the FAA's Airman Knowledge Testing Supplement) covers every symbol category in one place. Digital chart apps typically include the same legend information accessible through a menu or reference screen.
Why memorizing every symbol in advance isn't the goal
The FAA's Airman Knowledge Testing Supplement — including its full Legend 1 sectional chart legend — is physically handed to every candidate at the real Part 107 Knowledge Test. This means candidates are not expected to have every symbol memorized before walking in; the tested skill is being able to find and correctly interpret an unfamiliar symbol quickly using the provided legend, under the time pressure of a real exam. This course still teaches the most common, highest-priority symbols directly (covered in the earlier lessons of this module) because fluency with the common cases makes the occasional lookup faster and less disruptive — but treating the legend as a safety net for the rare or unusual symbol, rather than something to panic about memorizing completely, is the correct mental model.
How the legend is organized
A full sectional chart legend is grouped into logical categories rather than being one giant undifferentiated list — typically sections for airports, airspace information, navigation aids and communication, obstructions, and topographic and cultural features. Knowing this structure in advance is what makes a fast lookup possible: instead of scanning an entire legend line by line, a reader can jump straight to the relevant category based on what kind of symbol they're looking at (a point symbol near an airport, a line style on an airspace boundary, a small black marker in open terrain, and so on).
Real-world scenario: decoding an unfamiliar symbol during flight planning
A pilot planning a flight near an unfamiliar area notices a small chart symbol they don't immediately recognize, positioned near an airport but distinct from the standard airport circle already covered in this module. Rather than guessing, the pilot identifies the general category — this looks like it belongs with airport-related symbols, not airspace or obstruction markers — and scans that specific legend section rather than the entire document. Within moments, the legend confirms the symbol represents a specific airport service or facility type. This same targeted-lookup process is exactly what the real Knowledge Test expects a candidate to demonstrate when a chart excerpt includes a symbol beyond the commonly memorized set.
A sectional chart legend is organized by category, which is what makes a fast, targeted lookup possible.
View Larger
Identifying the likely category first turns a slow full-legend search into a fast, targeted lookup.
View Larger| Category | What it covers | Where to look first | Notes |
|---|---|---|---|
| Airports | Symbol shapes, colors, data block elements | Near an airport symbol | Covered directly in Lessons B and D of this module |
| Airspace information | Boundary line styles, vignettes, altitude notation | Along a boundary line or shaded area | Covered directly in Lesson C of this module |
| Navigation aids and communication | VOR stations, frequencies, other navigation symbols | Standalone symbols away from airports | Not central to typical Part 107 sUAS operations |
| Obstructions | Tower symbols, height notation, group obstacle markers | Small black point symbols with height figures | Covered directly in Lesson D of this module |
| Topographic and cultural features | Terrain shading, roads, railroads, powerlines, water | Background shading and line features | Covered directly in Lesson B of this module |
How to use the legend to decode an unfamiliar symbol
This targeted-lookup process works whether using a printed legend panel or a digital chart app's reference screen.
Identify the likely category first
Is the symbol near an airport, on an airspace boundary, a standalone point marker, or part of the terrain/cultural background?
Go directly to that legend section
Skip scanning the entire legend — go straight to the matching category to save time.
Match the symbol's shape and color exactly
Small variations in shape or color often carry distinct meanings — compare carefully rather than picking the closest-looking entry.
Apply the confirmed meaning back to the chart
Use the legend's definition to correctly interpret what that symbol means for the specific flight or question at hand.
| Mistake | Why it happens | Correct understanding | Regulation / source |
|---|---|---|---|
| Assuming every possible chart symbol must be memorized before the test. | Not knowing the testing supplement is provided at the exam. | The full legend (Legend 1) is handed to candidates at the real test — the tested skill is fast, accurate lookup, not total recall. | FAA Airman Knowledge Testing Supplement |
| Scanning the entire legend line by line for every unfamiliar symbol. | Not recognizing the legend's category structure. | Identifying the likely category first and jumping directly to that section is far faster. | Sectional chart legend organization |
| Picking the closest-looking legend entry without checking small details. | Similar symbols can look nearly identical at a glance. | Small differences (dashed vs. solid, filled vs. open) often carry distinct, important meanings. | Sectional chart legend |
Do I need to memorize every chart symbol for the Knowledge Test?
No. The FAA's testing supplement, including the full sectional chart legend, is physically handed to every candidate at the real exam. Memorizing the common symbols covered in this module speeds you up, but total recall of every possible symbol isn't required or expected.
Where can I find the legend on a digital chart app?
Most digital chart apps include a legend or reference screen accessible through a settings or help menu, showing the same symbol definitions as the printed chart's margin panels and Legend 1.
What if a symbol isn't in the legend at all?
This is rare, but if it happens, cross-reference the FAA Chart Supplement for that specific airport or area, or treat any unidentified symbol conservatively as a potential hazard requiring further investigation before flying nearby.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.