Green Guard
Join Date: Aug 2000
Location: RedIndia
Age: 96
Posts: 174
You do not draw any track or great circle on any globe .
Either you draw it on a Jepp Chart or any other chart with similar globe projection.
Or Calculate
Dist= asin ( sin Lat1 x sin Lat 2 + cos Lat 1 x cos Lat 2 x cos ( Long 2- Long 1))
Track Heading will constantly change with the distance....
even if both Lat1 and Lat 2 are on the same paralel....unless they are on equator.
(That is why it was not possible to use it while flying constant heading, before the time of INS etc)
P.S.
Or just use your RNAV computer
The problem is that the guy that started the post doesn't understand what a great circle is, he can 'use' the 'RNAV' sure, in the same way I (not a pilot) can 'use' the autopilot to 'fly' a plane.
Keep going like that and soon there will be Unmanned Airliners flying cause if its ok to use the RNAV cause you don't understand what a 'sphere' and a 'plane' are (geometrical plane, not the flying one), then it will be ok not to understand what 'lift' and 'glideslope' is cuase you can use the 'green dot'... I'd trust as a passenger more a computer than a 'RNAV user' or a 'green dot follower'. At least computers are deterministic.
delete if offending
cheers
(SLF)