Let’s start with an old hangar-flying puzzle. You’re outbound on the localizer back course. Your HSI course points back to the runway and you’ve got a right needle deflection. Which way do you turn?
HSI Localizer Magic
Key Takeaways:
- The Horizontal Situation Indicator (HSI) integrates VOR/LOC and heading information, simplifying navigation by providing directionally correct course deviation indications, eliminating "reverse sensing" confusion on VOR reciprocals and localizer back courses.
- To ensure correct localizer guidance with an HSI, including when flying back courses, pilots must *always set the front course* on the HSI's course pointer.
- While the HSI offers intuitive guidance for manual flying, autopilots often require a specific "BC" (back course) mode to correctly interpret localizer back course indications and provide appropriate steering commands.
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