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Given the following information, assuming conditions stay the same, what is the ETA at DELTA?

BETA to GAMMA distance: 60 NM
Actual time en-route: 30 min
Actual time of arrival at GAMMA: 1240 UTC
GAMMA to DELTA distance: 34 NM

  • A
    12:57 UTC
  • B
    12:37 UTC
  • C
    12:47 UTC
  • D
    13:07 UTC
  • (1) Calculate Ground Speed: BETA - GAMMA Distance: 60 NM
Flight time: 30 min
60 NM / 30 min x 60 = 120 kt
  • (2) Calculate flight time Time: GAMMA - DELTA
Distance: 34 NM
Ground Speed: 120 kt
Flight Time B-C = 34 NM / 120 kt = 17 min
  • (3) Calculate ETA at DELTA
ETA = Actual time of arrival at GAMMA + Flight time GAMMA - DELTA = 12:40 + 17 min = 12:57 UTC

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