GNAV Worksheet : WCA 2

 

Q1. Required track from A to B is 045T, Distance 90 Nm. After flying 60 Nm Pilot pinpointed the position 4 Nm left of the track. find Track to reach B.

053° –

  • TE: (604)/60 = 4°. CA: (604)/30 = 8°.
  • Total: 12°. Left -> Turn Right. 045 + 8 (CA only? No, question is Track to Reach B from current position). CA corrects to dest. New Track = Orig + CA? No. Geometry: Current Track = Orig – TE. New Track = Current + Total Correction. OR New Track = Orig + CA. Valid rule: Track to Destination = Original Track +/- Closing Angle.
  • Calc: 045 + 8 = 053.
  • Q2. Required track from A to B is 300T, Distance 150 Nm. After flying 60 Nm Pilot pinpointed the position 4 Nm Right of the track. find Track to reach B.

    297° –

  • CA: (60 * 4) / 90 (Dist to go) = 2.66°.
  • Corr: Right -> Turn Left. 300 – 2.7 = 297.3.
  • Q3. Required track from A to B is 020T, Distance 280 Nm. After flying 180 Nm Pilot pin pointed the position 6Nm Right of the track. find Track to reach B.

    016° –

  • CA: (60 * 6) / 100 = 3.6°.
  • Corr: Right -> Turn Left. 020 – 3.6 = 016.4.
  • Q4. Required track from A to B is 090 T, Distance 120 Nm. At 30 Nm from B Pilot pinpointed the position of aircraft 8 Nm Right of the Planned track. find Track to reach B.

    074° –

  • CA: (60 * 8) / 30 = 16°.
  • Corr: Right -> Turn Left. 090 – 16 = 074.
  • Q5. Required track from A to B is 270 T, Distance 250 Nm. At 60 Nm from B Pilot pinpointed the position of aircraft 5 Nm Right of the Planned track. find Track to reach B.

    265° –

  • CA: (60 * 5) / 60 = 5°.
  • Corr: Right -> Turn Left. 270 – 5 = 265.
  • Q6. Required track from A to B is 320T, heading 315 T, Distance 110 Nm. After flying 60 Nm Pilot pinpointed the position 5 NM starboard of the planned track. Find Heading to reach B.

    304° –

  • TE: (605)/60 = 5°. CA: (605)/50 = 6°. Total = 11°.
  • Correction: Starboard (Right) -> Turn Left.
  • New Heading: Old Heading (315) – Total Correction (11) = 304.
  • Q7. Required track from A to B is 020T, heading 355 T, Distance 250 Nm. After flying 120 Nm Pilot pinpointed the position 8 NM starboard of the planned track. find the track followed by the aircraft to arrive overhead B.

    016° –

  • Question: “Track followed… to arrive overhead B”. This implies the Required Track from the current position (Closing Angle method), not the Heading.
  • CA: (60*8)/130 = 3.7°.
  • Track: Right -> Left. 020 – 3.7 = 016.3.
  • Q8. Required track from A to B is 200T, heading 210 T, Distance 90 Nm. After flying 60 Nm Pilot pinpointed the position 8 NM starboard of the planned track. Find the heading must be maintained by the aircraft to arrive overhead B.

    186° –

  • TE: (608)/60 = 8°. CA: (608)/30 = 16°. Total = 24°.
  • Corr: Right -> Left.
  • New Hdg: Old Hdg (210) – 24 = 186.
  • Q9. Required track from A to B is 120T, heading 102T, Distance 70 Nm. After flying 40 Nm Pilot pinpointed the position 4 NM starboard of the planned track. Find the track to reach B.

    112° –

  • Question: “Track to reach B” (Closing Angle applied to Track).
  • CA: (60*4)/30 = 8°.
  • Track: Right -> Left. 120 – 8 = 112.
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