Quote:
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Stop the sub submerged and take your first bearing, then start the stopwatch. Draw the bearing on the map and wait for 2 minutes 10 seconds. Take your second bearing and draw it on the map. Pick any point along the second bearing and mark it with your marking tool. Wait until 4 minutes 20 seconds and take your third bearing. Go to flank speed perpendicular to the ship. Draw the third bearing from where you were stopped and then use your arbitrary point along the second bearing to draw two lines: One perpindicular to the first bearing and one perpindicular to the third. The first bearing will intersect with the perpindicular to third bearing and the third bearing will intersect with the perpindicular to first bearing. The line connecting those two points shows the exact course of your target hereinafter the ("course line"). The course line crosses bearing 1 at point "A" bearing 2 at point "B" and bearing 3 at point "C". Extend this line to create a point "D" such that the distance between A and B is the same as the distance between C and D. Draw a line from your original stopped location through point D and extending outwards. At 6 minutes reverse engines so that you are all stop by 6:30. Take a 4th bearing and where this bearing intersects the 4th line (through your original stopped ship and point D) is the target's exact triangulated location. Draw a line through the target's triangulated location parallel to the course line and you can extend that line forever and know that the target will be somewhere on that line unless it changes course.
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I've tried to make sense of this but it makes my head hurt.
When you say "Go to flank speed perpendicular to the ship" what does that mean?
Are you saying to to flank speed perpendicular to the current bearing to the target? Or are you saying go perpendicular to the target's track? If the latter, how do you know the target's track at that point?
When you say, " Draw the third bearing from where you were stopped", to you mean draw the third bearing line from where you started (stopped), or are you supposed to stop at 4:20?
Steve