Instrument - Navigation display (Day 4, 5 and 6) Flashcards
Regarding the RMI, the head of the needle points towards:
The NAVAID source
Regarding the RMI, the tail of the needle points towards:
The NAVAID radial you are flying on
What is “Homing”?
Adjust AC headding as necessary to keep the bearing pointer under the top index or upper lubber line. Because homing does not incorporate wind-drift correction, ind a X-wind the AC follows a curved path to the station.
HSI is what?
Horizontal situation indicator (basically the ND)
Wind drift correction: “initial correction”
Used to return to course:
30* below 90 kts
20* at or above 90 kts
Wind drift correction: “First trail”
Apply half the initial correction after course reinterception:
15* below 90 kts
10* at or above 90 kts
Wind drift correction: “Too little wind correction”
Repeat initial correction to return to course
Wind drift correction: “Second trail”
Increase correction by applying 1/2 of the first trail correction (ex: 1/2 of 15* is 7.5* [rounded to 7] is 22*)
Wind drift correction: “Too much wind correction”
If trail drift correction is too large, turn to parallel course and allow wind to drift back on course; then decrease correction on next trail correction.
Wind drift correction: “Bracketing process”
Continue until a heading is determined that maintains AC course.
Wind drift correction: “Corrections for unusually strong winds”
After applying standard initial corrections and course is not reintercepted. correction of 40* or more may be required to return to course.
Note concerning “Wind drift correction”
All degrees described in wind “drift correction” is degrees of heading from the desired track course.
Full deflection on the CDI in NMS mode (enroute) is:
2nm (1nm pr circle)
Full deflection on the CDI in VOR mode (enroute) is:
10* (5* pr circle)
