VOR CDI HSI RNAV
This is another of the most involved and important questions on the exam. There are various steps to follow:
- Draw a VORVOR —VHF Omnidirectional Range in the centre of a page (the proper symbol for which, to help with GNav and Fplan, is a hexagon).
- Draw an arrow going directly though the VORVOR —VHF Omnidirectional Range and in the direction of the selected track. The arrow head should be pointing in the direction of the selected track, and you should label it with this heading.
- Draw a perpendicular line to the selected track, again through the VORVOR —VHF Omnidirectional Range. You should now have four, 90° sectors surrounding the VORVOR —VHF Omnidirectional Range.
- Label the sectors. For the two either side of the arrow where the arrow points towards the VORVOR —VHF Omnidirectional Range, label them both "T" (for "To"). For the two sectors either side of where the arrow travels away from the VORVOR —VHF Omnidirectional Range, label them "F" (for "from"). Now for the right and left. Label the two sectors that are to the left (in the direction of the arrow) "R" (as you would have to fly right to get back to the arrow), then "L" for the other two sides.
You should now have four sectors: TR, TLTL —Traffic Load, FR and FLFL —Flight Level. Now look at the question. What does the CDICDI —Course Deviation Indicator say? The amount of deviation does not matter here, but you need to draw a straight line into the correct sector of the four. On that line, you can then draw the plane with the correct magnetic heading. You will find the original arrow for the selected track is now in front, behind, to the left or to the right of the aircraft nose. This will give you the answer to the question.