Read the Magenta Rings
Recognize Class C, read its shelves, and compare the aircraft's actual MSL altitude with the charted limits.
YOU WILL BE ABLE TO
- 01Identify the rule, source, or principle behind this idea: Class C uses solid magenta boundaries, commonly with a surface core and outer shelf.
- 02Explain the operational effect of this idea: Dimensions vary, so the charted floor and ceiling control over a memorized generic shape.
- 03Apply the lesson to a new mission and defend a go, modify, or no-go decision.
01 / MISSION
Begin with the operating problem.
A launch point lies beneath the outer shelf, but a planned climb would cross its floor.
02 / CORE BRIEF
What the remote pilot needs to know.
Class C uses solid magenta boundaries, commonly with a surface core and outer shelf.
Dimensions vary, so the charted floor and ceiling control over a memorized generic shape.
Part 107 operation within Class C requires authorization.
03 / PILOT DECISION
Make the call.
Keep the operation below the shelf only if every other requirement allows it, or obtain authorization before entering Class C.
04 / FIELD CHECK
Put it into the flight plan.
Evaluate airspace along the entire three-dimensional route, not only at takeoff.
05 / KNOWLEDGE CHECK
Does being outside the surface core always mean Class C authorization is unnecessary?
Reveal the debrief
No. An outer shelf can still contain the planned altitude.
RELATED FAA REFERENCES
Verify before you fly.
- FAA — Aeronautical Chart User's Guide
- FAA — Part 107 Airspace Authorizations
- 14 CFR Part 107 — current eCFR
Educational summary only. Current regulation, FAA approval conditions, manufacturer instructions, and site-specific facts control the operation.