[Kuikueg]

Originally Posted by karamazovnew

I did, I meant that the problem of 4 bearings while your sub is holding a steady course and speed is unsolvable.

And I managed to figure out why my solutions were correct. Because of the 0.5 ruler round-up, I ended up with errors in my position which translated into differences in my sub's speed. Since the distances and ranges were very small, this was enough to give me a workable solution. At longer distances (>10km), I would've ended up with the redline overlapping my 4'th bearing. So when I scaled up my plot, making my sub travel 1000 yards instead of 100, the error went down by a factor of 10 and I immediately ended up with all protracted points on the 4'th bearing

Right on!