>This is one of multiple instruments that, according to the author of See How It Flies[1] indicate important readings to the pilot, but don't exist at all in a

>This is one of multiple instruments that, according to the author of See How It Flies[1] indicate important readings to the pilot, but don't exist at all in a default airplane. The slip indicator, which replaces a yaw string in modern aircraft, is part of the standard avionics 6 pack.