Which is better vs1 or si1?

Related questions

1. Does Mach number increase with temperature?
2. How is true airspeed calculated?
3. Does wind affect Indicated Airspeed?
4. Does headwind increase or decrease airspeed?
5. What is true indicated airspeed?
6. Can you speed in an airplane?
7. Does headwind increase airspeed?
8. How does density altitude affect true airspeed?
9. Is ground speed faster than airspeed?
10. How is airspeed calculated?

Tags

1. #clearly
2. #usually
3. #possibly
4. #naked
5. #visible
6. #included
7. #smaller
8. #multiple
9. #under
10. #magnification
11. #internal
12. #inclusions
13. #flaws
14. #slightly
15. #larger