Originally Posted by
Ulric
Are there solutions for constant heading? i.e. rhumb line navigation?
There are rhumb line trajectories intersecting all the ping rings, with variable speeds, they depend where your starting point (at 18:29) is:
best bearing (so as to minimize speed variations) as a function of the starting point (lat/long)
https://drive.google.com/file/d/0B3s...it?usp=sharing
the blue circle portion is the 18:29 ping ring
associated (for the best bearing) mean speed as a function of the starting point (lat/long)
https://drive.google.com/file/d/0B3s...it?usp=sharing
associated variability (std) of the speed as a function of the starting point (lat/long)
https://drive.google.com/file/d/0B3s...it?usp=sharing
the best rhumb line trajectories exhibit a 27 kts standard deviation (speed variations) from their mean speed.