Mode The letter or number assigned to a specific pulse spacing of radio signals. Discover more from Canadian Flight Trainers Subscribe to get the latest posts sent to your email. Subscribe Related Articles: Float Rating – Part 2Float Rating Part 3 | How to Take-off from WaterSeaplane Rating | How to Land a Float PlaneGlossary: Automatic Dependent Surveillance – Broadcast (ADS-B)Glossary: Automatic Altitude Reporting