What action must follow a NOTAM that uses the term "Approximately"?

When a NOTAM indicates "Approximately," it usually highlights that the information provided may not be precise, often relating to a specific location, altitude, or operational detail that is subject to slight variations. In such cases, the accuracy of the NOTAM must be validated to ensure safety and operational efficiency.

Subsequently, the issuance of both a replacing and a cancelling NOTAM is warranted in this scenario. A replacing NOTAM is necessary to provide the most accurate and up-to-date information to pilots and air traffic controllers, while a cancelling NOTAM resolves the ambiguity or outdated details from the original NOTAM. This dual action is essential to maintain clear and accurate communication within the aviation system, allowing stakeholders to have the latest information before making operational decisions.

Thus, responding to a NOTAM that uses "Approximately" with both a replacing and a cancelling NOTAM ensures that everyone has access to the most precise data for flight operations.