transponder requirements

Traffic Pattern Oct 1, 2026

Class Charlie Airspace, the Two-Ring Radar Environment That Lives Between Bravo and Delta, and the Contact Rule That Is Not a Clearance and Not What Most Students Think

Class Charlie airspace requires two-way radio communication and a Mode C transponder to enter - but 'standby' from the controller does not count as established contact.

Pattern

Traffic Pattern Aug 19, 2026

The Mode C Veil, the Thirty-Nautical-Mile Ring Nobody Sees on the Sectional, and the Transponder Rule That Bites More Pilots Than the Bravo Itself

The Mode C veil is a 30 NM ring around Class Bravo airports where a working transponder and ADS-B Out are required from the surface up.

Pattern

Traffic Pattern Aug 9, 2026

The Mode C Veil, the Thirty-Mile Ring Around Class Bravo, and Why That Invisible Circle Traps More Good Pilots Than the Airspace Itself

The Mode C Veil is a 30nm transponder ring around Class Bravo that traps pilots who never enter the busy airspace itself.

Pattern

Traffic Pattern Jul 26, 2026

The Class Bravo Mode C Veil Nobody Briefs on the Way Home, and Reading a VFR Sectional's Airspace Layer Cake Before You Leave Oshkosh

The Mode C Veil requires a working transponder within 30nm of major Class Bravo airports - even in uncontrolled airspace. Here's how to read it.

Pattern

Traffic Pattern Jul 24, 2026

The Mode C Veil, the Thirty-Mile Ring Around Chicago's Class Bravo, and the Transponder Rule Every Pilot Skirts on the Way to Oshkosh

The Mode C veil is a 30nm transponder-required ring around Class Bravo airports - here's how to stay legal flying past Chicago to Oshkosh.

Pattern

Traffic Pattern Jul 1, 2026

airspace refresher

Class Bravo airspace requires an explicit ATC clearance before entry - not just radio contact or a squawk code - a distinction that catches VFR pilots off guard more than almost any other rule.

Pattern

Traffic Pattern Jun 28, 2026

The Mode C Veil - The Thirty-Mile Ring Around Class B That Catches Pilots Who Don't Know It's There

The Mode C veil is a 30-nautical-mile transponder requirement around every Class B airport - active even when you never enter Class B airspace.

Pattern