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Given the following information, calculate the true track and groundspeed:

TAS: 480 kt
Heading: 040°T
Wind velocity: 090°T /60 kt

  • A
    Track: 032°T, groundspeed: 425 kt
  • B
    Track: 028°T, groundspeed: 415 kt
  • C
    Track: 046°T, groundspeed: 435 kt
  • D
    Track: 034°T, groundspeed: 445 kt

Determining track and G/S with the flight computer:

1. Place Centre Dot on TAS (480 kts)
2. Rotate Wind Computer to place wind direction (90ºT) under True Heading Index
3. Make a Wind Mark on Centre Line 60 kts below centre dot (over 420 kts)
4. Rotate Wind Computer to put True Heading 40ºT under True Heading Index
5. Read Drift 6º Left (Port) and Ground Speed (445 kts) under Wind Mark

True Heading 40º - Drift 6º Left = True Track 34ºT

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