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Refer to figure.
Based on the VFR nav log provided, what ground speed values should be anticipated on the two route segments shown?

  • A

    110 kt (1st sector) and 82 kt (2nd sector)

  • B

    112 kt (1st sector) and 82 kt (2nd sector)

  • C

    112 kt (1st sector) and 94 kt (2nd sector)

  • D

    116 kt (1st sector) and 76 kt (2nd sector)

Refer to figures.
Solving from Heading (HDG) and GroundSpeed (GS), knowing WV, TAS and required track.

1st sector:

  1. Set wind direction to 200° under the "TRUE HEADING" index at the top.
  2. Set the center point on the True Airspeed (TAS) of 95 kt.
  3. Mark the wind velocity 16 kt down from the centre point.
  4. Initially, set the True Track to 035° under the "TRUE HEADING" index.
  5. Note that this heading would result in 2°L drift and a track of 033°.
  6. Reduce the heading value under the index until the heading minus the drift gives a track of 035°. This occurs at a heading of 037° with 2°L drift.
  7. The groundspeed for this track is approximately 110 kt.

2nd sector:

  1. Set wind direction to 200° under the "TRUE HEADING" index at the top.
  2. Set the center point on the True Airspeed (TAS) of 95 kt.
  3. Mark the wind velocity 16 kt down from the centre point.
  4. Initially, set the True Track to 167° under the "TRUE HEADING" index.
  5. Note that this heading would result in 6°L drift and a track of 161°.
  6. Reduce the heading value under the index until the heading minus the drift gives a track of 167°. This occurs at a heading of 173° with 5°L drift.
  7. The groundspeed for this track is approximately 82 kt.

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