General Navigation - Speed

4 important questions on General Navigation - Speed

Indicated Air Speed (IAS)

The air speed read from the Air Speed Indicator (ASI) and is the speed of the aircraft through the surrounding air

Equivalent Wind Component (EWC)

The difference between Ground Speed (GS) and TAS is named Equivalent Wind Component (EWC)
Tailwind: positive
Headwind: negative
EWC = GS - TAS

Drift Angle (DA)

The angle measured from heading to track is called drift angle (DA)
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Wind Correction Angle (WCA)

The angle measured from track to heading is called wind correction angle (WCA)

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