Readback: December 2012

Frank Bowlin may have a misunderstanding of how the CDI needle works while the HSI is using LOC signals.

Key Takeaways:

• An incorrect HSI OBS setting on a localizer approach, though not affecting the CDI's physical movement, can critically degrade a pilot's situational awareness, leading to misinterpretations and incorrect turns.
• "T" notations on approach charts typically refer to obstacle notes in the A/FD, distinct from Obstacle Departure Procedures (ODPs) which are published when the 40:1 obstacle clearance surface is penetrated.
• ILS localizers can be intentionally offset from the runway centerline (up to 3 degrees), a fact that is explicitly charted, with differing classification criteria for localizer procedures with or without vertical guidance.
• The publication actively incorporates reader feedback, addressing specific questions and considering requests for future articles on topics like upcoming ICAO flight plan changes.

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