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Refer to figure.
You are flying from Ajaccio, Corsica to Grosseto, Italy. Using the in-flight actual groundspeed, what are the new ETAs for ELB and UPADU?
  • A
    ELB 13:46 and UPADU 13:48
  • B
    ELB 13:42 and UPADU 13:44
  • C
    ELB 13:45 and UPADU 13:47
  • D
    ELB 13:44 and UPADU 13:46
Refer to figure.

The ATA at LIBLO is at 13:19 and the ATA at BTA is 13:31. So, the aircraft needs 12 minutes to cover a distance of 35 NM.

So, its Actual GS will be: Distance from LIBLO to BTA / Sector time = 35 NM/12 min x 60 = 175 kt.

Thus:

  • The new ETA at ELB will be: Sector time from BTA to ELB + ATA at BTA = 14 min (41 NM / 175 kt x 60) + 13:31 = 13:45
  • The new ETA at UPADU will be: Sector time from ELB to UPADU + ATA at ELB = 2 min (5 NM / 175 kt x 60) +13:45 = 13:47.

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