For CYHM ILS 12 approach plate, what is the MSA centered on?

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Multiple Choice

For CYHM ILS 12 approach plate, what is the MSA centered on?

Explanation:
Minimum Safe Altitude circles are built around a navigation facility that defines the initial approach path, not around the runway itself. The altitude shown within the MSA ensures obstacle clearance within a defined radius around that facility. For the CYHM ILS 12 approach, the MSA is centered on the ZHA NDB. This means the obstacle-clearance altitudes apply in sectors radiating from the ZHA NDB, reflecting the initial approach reference used for this plate. The ILS or the airport isn’t the center in this chart, and the ZHM NDB is not the reference used for this MSA.

Minimum Safe Altitude circles are built around a navigation facility that defines the initial approach path, not around the runway itself. The altitude shown within the MSA ensures obstacle clearance within a defined radius around that facility.

For the CYHM ILS 12 approach, the MSA is centered on the ZHA NDB. This means the obstacle-clearance altitudes apply in sectors radiating from the ZHA NDB, reflecting the initial approach reference used for this plate. The ILS or the airport isn’t the center in this chart, and the ZHM NDB is not the reference used for this MSA.

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