Originally Posted by
schone
What was the correct way to figure it out? Or did you just use the "direct from XXX apt to XXXXX wpt - XX NM" lines that jepp provides on some of the DPs/STARs?
If it's not on the plate and you HAVE to calculate an arc segment length, it's 2 x "pi" x R x D divided by 360, where R is the radius of the arc and D is the number of degrees between the starting and ending radials. For example, the 15 DME arc from the 080 to the 140 radial would be 2 x 3.14 x 15 x 60 divided by 360 = 15.7 miles.
Caution: It's been 40 years since I took trigonometry, and even if my answer is correct, giving it in an interview might sound the "nerd alert"!
