THNX Retired for discussing how easy using an AoA indication is.
Sucker shows stall or optimum approach speed or.... regardless of your weight. And we can still use rules-of-thumb to make a comparison - you know, 175 knots plus 5 knots for every thousand pounds above 3,000 ( F-101B VooDoo). If the AoA is really high or low at the textbook speed, check your flaps or fuel gauge or... And that's the OODA I was referring to, PJ, basic instrument crosscheck.
I am having my leading edge flap failure approach digitized, and will make it available in a few days. I flew airspeed and not AoA due to controllability factors, but you can see the AoA bracket and watch what it does just before touchdown. Can also see how valuable the flight path marker is, as it shows you where you are gonna crash.