Which squawk code is typically used for number 2 during instrument trail?

In an instrument trail formation, squawk codes help maintain proper separation and identification of aircraft. The code typically assigned for the number 2 position in an instrument trail is 0100. This is a standardized squawk to ensure that air traffic control can easily differentiate between the leader and the follower aircraft.

Using this specific code aids in situational awareness and tracking when multiple aircraft are operating in close proximity, particularly in formation flying. Other codes are used for different positional aircraft within the formation, allowing for an organized and efficient system of communication and coordination among the pilots and air traffic controllers. Hence, 0100 is the correct squawk code for the number 2 position in an instrument trail formation.