Which pair of squawk codes are used for outbound and inbound respectively?

• A. 0400 and 0100
• B. 0100 and 0400
• C. 0100 and 0100
• D. 0400 and 0400

Answer: (B)

In the Thrasher course rules, squawk codes are used to identify which leg of the course you’re on, helping ATC distinguish outbound from inbound traffic. The outbound leg is assigned 0100, signaling you’ve left the field and are proceeding along the course. When you reach the turn point and start the inbound leg back to the airport, you switch to 0400, showing you’re returning. This distinct pairing prevents confusion for ATC, making it clear which leg you’re on and aiding proper sequencing. Using a different arrangement, like 0400 on outbound or 0100 on inbound, would blur which leg is active, and using the same code for both legs would remove that directional distinction. So the combination of 0100 outbound and 0400 inbound is the correct pairing.