Quote:
Originally Posted by Drakken
Got it now, thanks!
For the first method, how do you usually proceed with acquiring a collision course? Do you go by first adjusting your boat's course port or starboard, until the bearing remains constant, then trim slightly as you proceed or is there a formula that can be used which assigns a probable bearing difference between the two ships' bow, for a given target speed?
What do you do if the bearing suddenly changes by 1-2 degrees after more than 15 minutes? For example, in situations in which you are intercepting a target by hydrophones over long range.
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This is simply trial and error. I found it best to first adjust your speed until the bearing just barely changes and then fine-tune it with course changes. It really only needs to be held constant over the course of a few minutes. Also, just be aware of that the closer you are to a 90° angle on bow, The more accurate the results, since the formula divides by the sine of the angle on bow, and the further away you are from 90° the more effect small AOB estimation errors will have.
I use these methods primarily for finding target speed, whereas when I first made this post it was a way to calculate a Gyro angle for purposes of shooting, but using it to compute speed is much more useful.