What does a Terminal Change Notice (TCN) ensure?

A Terminal Change Notice (TCN) is crucial for ensuring that pilots are relying on the most recent and accurate information when navigating within terminal airspace. By confirming that the approach plate selected is current, a TCN helps to facilitate safe and efficient flight operations. This is especially important because approach plates can change frequently due to updates in procedures, airspace structure, or navigational aids. Relying on outdated information could lead to misjudgments during critical phases of flight, such as approaches and landings.

The other options, while relevant to aviation safety and compliance, do not specifically align with the function of a TCN. FAA regulations encompass a broad range of operational and safety standards but are not directly assured by a TCN; weather conditions are critical for flight safety, but a TCN does not ensure pilot familiarity with them; and training records being up to date is important for pilot proficiency but is unrelated to the purpose of a TCN. Therefore, the primary purpose of a Terminal Change Notice is to guarantee that the approach plate used is the latest version, which is critical for informed decision-making in flight operations.