61-05. IN-FLIGHT NAVIGATION
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1. An aircraft at FL120, IAS 200 kts, OAT -5° and wind component +30 kts, is required to reduce speed in order to cross a reporting point 5 min later than planned. Assuming flight conditions do not change, when 100 NM from the reporting point IAS should be reduced to:
2. Transferring position lines:
3. A ground feature was observed on a relative bearing of 315° and 3 min later on a relative bearing of 270°. The W/Vis calm; aircraft GS 180 kts. What is the minimum distance between the aircraft and the ground feature?
4. (Refer to figure 061-06)
Complete line 3 of the FLIGHT NAVIGATION LOG, positions “E” to “F”. What is the HDG0 (M) and ETA?

5. An aircraft at FL310, M 0,83, temperature -30 “C, is required to reduce speed in order to cross a reporting point five minutes later than planned. Assuming that a zero wind component remains unchanged, when 360 NM from the reporting point Mach number should be reduced to: