What information is typically included in the margin information of an IAP chart?

The margin information of an Instrument Approach Procedure (IAP) chart typically includes communication frequencies. This section is crucial for pilots as it provides the specific frequencies they need to use when communicating with air traffic control, approach, and other relevant services during the approach and landing phases of flight. This information allows pilots to ensure they are on the correct frequency to receive necessary instructions and coordination, which is essential for maintaining safety and efficiency in the airspace system.

Other types of information such as obstacle heights, meteorological data, and flight operating procedures are typically found in different sections of the chart or in supplementary materials rather than in the margin information. This dedicated focus on communication frequencies ensures pilots have immediate access to the information they need for successful navigation and communication during critical phases of flight.