HSI Flashcards

1
Q

HSI

A

Horizontal situation indicator

Tail of the “tell” or “too from flag”.

  • HSI Deviation scale -
    Scale is 10* degrees in VOR mode
    Scale is 2.5* degrees for LOC
    GPS scale is 5NM enroute, 1NM terminal, and 0.3NM in area

Dial glide slope - deviation scale is for pitch angle (precision approach)

Radial is given by the tail of the triangle.
Point of triangle points to the NAVAID!!! (Not the large arrow)

Deviation bar is the COURSE! If the bar moves left, you are right of it!!

The TO-FROM flag will switch around when passing over the VOR - tells us we’ve reached an passed the VOR

NAVAID flag displays when signal received is not reliable

Locate course to be selected, move course indicator to new course, then turn until course deviation bar centers and then continue on the course

Course interception is always TOWARDS the deviation bar

Wind correction - deviation bar moves to the wind direction as you’re blown off course

+/- 5 degrees tolerance for VOR tracking

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