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John.Heddles replied the topic: ETI from departure to destination
Several points to note -
(a) one can't mix deg T and deg M with a significant variation. You have all the information in deg T so there is no need to convert anything to deg M. Makes no difference to the answer if you work all in magnetic or all in true - your call if you want to do more calculations than you need to do. You just can't mix the two.
(b) answer on the Dalton or Jepp is the same (as you would expect). G/S =114 and HDG = 157-158T (heading is not required for the question)
(c) suggest you always run the ETAS calculation on the Jepp, regardless of the drift angle. Gives you the mathematically correct answer and you always use the same technique rather than setting yourself up for another decision and potential for error.
(d) perhaps you meant to type in 168/114 in the previous post ?
Engineering specialist in aircraft performance and weight control.