Mode Ten Ninety
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Field notes

The MODE 1090 journal.

Practical guides to observing aircraft and understanding the flight data shown in MODE 1090.

  1. MODE1090 flight map on an iPhone beside a nearby aircraft list showing type, callsign and registration.

    Basics

    Callsign, flight number and aircraft registration explained

    Is a callsign the same as a flight number? Learn what each identifier tells you and which one to use when looking for a flight or a particular aircraft.
    5 min read
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