61-05. IN-FLIGHT NAVIGATION
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1. At 00:20 UTC an aircraft is crossing the 310″ radial st 40 NM of a VOR/DME station. At 00:35 UTC the radial is 040° and DME distance is 40 NM. Magnetic variation is zero. The true track and ground speed are:
2. At 04:22 an aircraft at FL370, GS 320 kts, is on the direct track to a VOR 185 NM distant. The aircraft is required to cross the VOR at FL80. For a mean rate of descent of 1.800 ft/min at a mean GS of 232 kts, the latest time at which to commence descent is:
3. The ICAO definition of ETA is the:
4. Halfway between two reporting points the navigation log gives the following information:
TAS: 360 kts
W/V: 330V80 kts
Compass heading: 237°
Deviation on this heading: -5°
Variation: 19°W
What is the average groundspeed for this leg?
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5. An aircraft at FL290 is required to commence descent when 50 NM from a VOR and to cross that VOR at FL80. Mean GS during descent is 271 kts. What is the minimum rate of descent required?
