What is the maximum allowable altitude overshoot or undershoot per IOM Altimetry Procedures?

The correct answer is based on the guidelines established in the IOM Altimetry Procedures, which specify that a maximum allowable altitude overshoot or undershoot is 150 feet. This standard is important for maintaining safety and ensuring compliance with altitude guidelines during flight operations.

Understanding this limit is crucial for pilots and flight operations personnel as it helps ensure that aircraft maintain appropriate altitudes, which is essential for avoiding potential conflicts with other aircraft, adherence to assigned flight levels, and for overall operational safety. This altitude tolerance is designed to accommodate minor discrepancies that may arise from altimeter setting variations or environmental factors while still ensuring safe and effective altitude management throughout the flight.