Final answer:
A pilot squawks 1200 to indicate VFR flight without ATC services in the US. It ensures communication and safety for aircraft operating outside of ATC direction.
Step-by-step explanation:
A pilot would squawk 1200 on the transponder when not under air traffic control (ATC) direction and is flying under Visual Flight Rules (VFR) in the United States. The transponder code 1200 signifies to ATC that an aircraft is flying VFR and is not receiving flight following services. It's important for pilots to ensure they're using the appropriate squawk code based on their current flight status to maintain proper communication and safety in the airspace.