11-217V1 Ch12 Flashcards
One inside the final approach fix the pilot must do what?
Remain tuned to and display the facility that provides final approach course guidance
When can you go below step down fixes?
Limited to aircraft capable of simultaneous reception of final approach course guidance and the stepdown fix
What is the VDP computed for?
The non precision approach with the lowest MDP
When can you use a 75 MHz marker?
In procedures where DME cannot be implemented.
What is the VDP?
A defined point in the final approach course of a non precision approach straight in approach procedure from which a normal descent (3 deg normally) may be commenced
What does it mean if the approach is published without a VDP?
An obstacle may penetrate the 20:1 surface or the approach may have been published before VDPs were emphasized
How do you calculate the VDP?
HAT/GS
How can you calculate the VDP with timing?
10% of the HAT in seconds is the approximate amount of time to descend from the HAT, and subtract that from the time to get from FAF to the runway based on g/s
What’s the MAP?
The missed approach point. The point on non precision approaches where an aircraft will execute a missed approach if the runway is not in sight or not in a safe position to land
What must you do if a turn is required over the FAF?
Turn immediately and intercept the final approach course. Do not descend below the MDA or step down until past the FAF
When is an approach still considered a straight in?
A course change up to 30 deg
How do you calculate the needed VVI for a 3 deg g/s?
Groundspeedx10/2
When is timing required?
When the final approach does not terminate at a published fix
When can you descend from the MDA/DA/DH?
When sufficient visual reference with the runway environment has been established and the aircraft is in position to execute a safe landing
What is considered runway environment?
Approach light system, threshold markings or lights, runway end identifier lights, touchdown zone markings or lights, runway or runway markings, runway lights, visual approach slope indicator
What are non radar approaches?
Approaches that do not require radar vectoring or radar services on final and may or may not provide electronic glide path guidance
When is an ILS/LOC NA?
If the localizer or OM (with no suitable substitute available) fails
At what sensitivity should airborne marker beacon receivers operate?
Low
What do you set on a localizer back course?
The published front course
The glide slope has a usable range of what?
10 Miles
The localizer signal has a usable range of what?
18 Miles within 10 deg of course centerline
ATC May clear you to intercept the loc course beyond 18 Miles or the published limit when?
When A/C in radar contact and ATC sharing responsibility for course guidance
When must the ILS/LOC approach be discontinued?
If the localizer course becomes unreliable or any time full scale deflection of the CDI occurs on the final approach
Do not descend below localizer mins if the aircraft is what?
More than one dot below or two dots above glide slope
Is it possible to receive false or erroneous glide slope signal with both ground and air components of the glide slope system operating normally, normal ident, and no off flags or warnings while on the localizer course?
Yes
At what weather are vehicles and aircraft not authorized in and over ILS critical area?
800’ and 2 mi when arriving aircraft is between the FAF and airport (except for aircraft that land, exit a runway, depart or go missed)
What does it mean when controllers advise “Localizer/glideslope signal not protected”?
There are aircraft or vehicles potentially inside the ILS critical area which may affect ILS indications
What should you check at the glide slope intercept point?
The intercept altitude and if it matches the chart
When can you descend out of the restrictive altitude on final?
When established on final
How is the Gs intercept altitude identified?
A lightning bolt
What is decisión height (DH)?
The height above touchdown referenced by a radar altimeter and is the height at which a decision must be made during a precision approach to continue or go missed
How is obstacle clearance calculated for a DH?
Allows a momentary descent below DH while transitioning from final to a missed approach