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Originally Posted by Quillan
That's fairly simple; all bearings are relative. What that means is that the bearing is relative to the current heading of your boat. If sonar gives a target at 30° and 2750 yards away, that means it is 30° off your bow at that distance, so you'd first use the tools to draw a line 30° away from your boat, then put a mark 2750 yards down that line. The mark will be where the target is. Do that twice and you now can draw a line connecting the two points, which gives the course of the target. If you measured the time between the two with the stopwatch, you can now use the time interval and the distance between the two marks to caculate speed, and that gives you all the information you need to set up your attack.
Remember, 0° is directly forward, and the numbers go in a clockwise direction, so 90° is directly off the starboard (right) side, 180° is due astern, and 270° is directly off the port (left) side of the boat.
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Quillan, I actually understand that whole "relative bearing" thing.....but what I'm having trouble with currently is:
A) Using the protractor to draw that bearing line to the target. The explanation that Midnight Hunter gave above really helped in this regard. In his example, the enemy cruiser is already on the map, so he can place the protractor in front of the crusier and then draw the AOB by then drawing the line to the middle of the crusier, then over to the middle of the player's sub. I get that part. BUT, what about when I can't see the enemy ship and I'm using sonar to establish it's bearing and range? How do I use the protractor to establish the first mark I make. I think once I get that bearing line marked, it'll be relatively easy to use the compass to get the range, and then make that first mark on the spot where the two lines intersect.
In short, when I can't see the enemy ship on the NAV map, it makes it more difficult(at least for me) to make that first mark on the NAV map. There's gotta be a video out there that shows this. If not, I may have to make it myself once I figure it out.