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-   -   Gen Nav (https://www.pprune.org/professional-pilot-training-includes-ground-studies/655437-gen-nav.html)

dojeevs 23rd Oct 2023 08:27

Gen Nav
 
A course of 120° (T) is drawn between X (61° 30N) and Y (58° 30N) on a Lambert Conformal conic chart with a scale of 1: 1 000 000 at 60° N. The chart distance between X and Y is: A) 66.7 cm B) 33.4 cm C) 38.5 cm D) 36.0 cm

Alex Whittingham 23rd Oct 2023 10:41

Just confirm, please, that the 61 and the 58 are longitudes East or West and the latitude in both cases is meant to be 30N? or is latitude only given with one point 61°30'N and the other 58°30'N?

B2N2 23rd Oct 2023 11:20

Again a glorious example of how these exam questions having no practical use or whatsoever.

dojeevs 23rd Oct 2023 17:58

The question is printed as it has been given in the paper. I am sorry i do not have any further information available on this

Alex Whittingham 23rd Oct 2023 21:04

I think we are assuming that we have a right angle triangle with the angle between the track of 120° and the meridian being 60°, then cos60° = A/H, then H = A ÷ cos60° = 180/cos60° = 360 NM. Chart distance = 360*6080÷3280*1000*100 / 1,000,000 = 66.7 cm. Not an EASA Q I am aware of, Indian DGCA?

340drvr 24th Oct 2023 09:45


Originally Posted by B2N2 (Post 11526128)
Again a glorious example of how these exam questions having no practical use or whatsoever.

Maybe trip-planning for a small bug walking across the chart?

sshd 26th Oct 2023 09:07

Some of gnav questions are absolutely ridiculous, just pass the exam and then you are allowed to forget everything about it (so 90% of the whole bank)


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