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Class B Airspace—A Pilot’s Guide

Flight Training Central

A transponder with altitude reporting and an approved ADS-B out transmitter are also required for all operations. With few exceptions, the transponder and ADS-B units must also be operable within 30 nautical miles of the primary airport within the Class B airspace, even when not entering the Class B airspace.

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Pilot’s Guide to Airspace

Flight Training Central

indicated airspeed, the speed limit for operations below 10,000′ MSL. indicated airspeed. Before operating in Class B, you must receive authorization from ATC, maintain two-way radio communications with ATC, have an operating transponder with altitude reporting and be ADS-B Out equipped.

AGL 52
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Class C Airspace Explained

Pilot Institute

Aircraft need to have a two-way radio, transponder with Mode C, and Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment. Class C airports’ speed limits require aircraft within 4 Nautical Miles (NM) of the primary airport and below 2500 feet to maintain an Indicated Airspeed (IAS) of 200 knots or less.