CH. 13 - Mastering Approaches Flashcards
What does the Horizontal Situation Indicator (HSI) combine?
A heading indicator and a VOR receiver.
What is the Omni Bearing Selector (OBS) used for on the HSI?
To select a radial.
What does the white TO/FROM arrow on the HSI indicate?
Whether the aircraft is flying towards or away from the station.
What does it mean if no white TO/FROM arrow is shown on the HSI?
The aircraft is either 90 degrees from the radial or overflying the station.
What does the Course Deviation Indicator (CDI) on the HSI show?
How far the aircraft is from the selected radial on the OBS.
How many degrees does each white dot on the HSI’s CDI represent?
2 degrees.
What is the maximum deflection shown by the CDI on the HSI?
10 degrees (5 dots on each side).
What does a right deflection of the CDI on the HSI indicate?
The aircraft is left of the selected radial.
How should a pilot correct when flying towards the station with a right CDI deflection?
Turn the aircraft to the right to get back on course.
On the HSI, if the OBS is set to 180° with a TO indication and right CDI deflection, where is the aircraft located relative to the station?
North-east of the station.
If the CDI shows a 9-degree right deflection on a 180° radial, what heading should be flown to center the CDI?
189° heading (assuming no crosswind).
If you need to fly a 189° course to reach the station, what radial are you on?
The 009° radial.
What is the back course of an ILS approach?
The course line opposite the front course.
How should a pilot fly a back course without reverse sensing capability?
Fly in the opposite direction of the CDI needle.
How does reverse sensing help when flying a back course?
It allows the pilot to correct toward the center of the CDI.
