What phrase should be used to request a helicopter or turbojet aircraft to squawk a new code?

The appropriate phrase to request a helicopter or turbojet aircraft to squawk a new code is "Radar contact (position). If feasible, squawk (code)." This phrase communicates two crucial pieces of information to the aircraft: first, it establishes that the radar has successfully made contact with the aircraft and provides its position, which is essential for situational awareness. Secondly, the phrase includes the conditional "if feasible," which acknowledges that the aircraft may be in a situation where changing the squawk code might not be possible immediately or at all due to operational considerations.

This communication style aligns with established aviation procedures, as it ensures clarity and respects the aircraft's current operational context. It fosters a cooperative environment, allowing the pilot to assess whether they can comply with the request without pressure, enhancing safety and efficiency in air traffic management.

While the other phrases may convey a request for a new squawk code, they lack the specific procedural clarity and situational awareness context that the chosen phrase provides.