For comparison here is the AoA detail from F/A-18A/B/C/D Hornet NATOPS.
NATOPS FLIGHT MANUAL NAVY MODEL F/A-18A/B/C/D 15 Sept 2008http://info.publicintelligence.net/F18-ABCD-000.pdf"
2.12.10 Angle-Of-Attack (AOA) Indexer. The AOA indexer (figure 2-19) is mounted to the left of the HUD. It displays approach angle of attack (AOA) with lighted symbols. Corresponding AOA indications are shown on the HUD. The indexer only operates with the landing gear down, W-off-W, a valid ADC AOA signal and a functional ADC. The lighted symbol(s) flash if the arresting hook is up and the hook bypass switch, on the left vertical panel, is in CARRIER. The symbols do not flash with the arresting hook up and the hook bypass switch in FIELD. The switch is solenoid held to FIELD and automatically goes to CARRIER when the arresting hook is lowered or aircraft power is removed. The
AOA indexer knob on the HUD controls dimming of the symbols. All symbols light when the lights test switch on the interior lights control panel is held to TEST.
NOTEOn aircraft 161353 THRU 161519 without the latest configuration of
air data computer installed, a discrepancy exists between optimum
approach angle indications provided by the angle-of-attack bracket on
the HUD and the angle-of-attack indexer lights. Thus, flying On Speed
(velocity vector centered in AOA bracket) on the HUD produces a
Slightly Slow indication on the indexer lights. On the other hand,
flying On Speed on the indexer lights results in a slightly fast
indication by the HUD AOA bracket display. Use of either instrument
to set up the optimum approach angle is considered acceptable.
&
Angle of attack. True angle of attack in degrees is displayed at the left center of the HUD. The primary source for this information is the ADC. If the ADC produces invalid AOA outputs, the MC uses FCC information to derive the AOA display. There is no pilot queuing when the MC switches AOA sources from ADC to FCC because both components get AOA information from the AOA probes. For lower AOA values, HUD AOA is an average of the AOA probe readings received by the ADC. Above 34° AOA, HUD AOA is estimated and provided by the INS."
