Private Pilot Private Exam

What transponder code should be selected when operating VFR below 18,000 feet MSL, unless otherwise authorized?

1. Code 1200

2. Code 7500

3. Mode3/B

4. Squawk 4000

The correct answer is: Code 1200

The correct transponder code to select when operating VFR (Visual Flight Rules) below 18,000 feet MSL (Mean Sea Level), unless otherwise authorized, is 1200. This code is specifically designated for VFR operations in the National Airspace System. When a pilot operates under VFR conditions, using the transponder code 1200 allows air traffic control and other aircraft to identify and differentiate VFR traffic from IFR (Instrument Flight Rules) traffic, which typically uses different codes. In contrast, other codes serve distinct purposes; for example, code 7500 is reserved for situations involving unlawful interference, such as aircraft hijacking, and is not meant for standard VFR operations. Mode 3/B is not a specific code but rather a type of transponder mode used for identification and altitude reporting, which does not denote a specific squawk code. Squawk 4000 is commonly associated with a specific context or local operational use, rather than the standard operational protocol for VFR below 18,000 feet. Using code 1200 when operating under VFR enhances situational awareness for both the pilot and ATC, facilitating easier tracking and communication within the airspace environment.