To plot bearings I believe stock GWX comes with a compass scale on the line tool. (it's been ages since I played GWX modless) It should have South/180 on top, and East/90 on the left. There is nothing wrong with that one. It is deliberately rotated 180 degrees.
1: Take the bearing,
2: add your course to it.
3: Then reduce it with 360 if the result is more than 360. Now you have what is known as "True bearing"
4: start a line from your location.
5: draw the line out in a direction that makes the (true) bearing pass over the scale mark
I personally tweaked these files so I have that 'rotated' scale on all 4 line-based maptools. See this file:
http://www.gamefront.com/files/22006..._all_lines.zip Anyway, you should be able to use these. It's JSGME friendly.
I come from a habbit of wanting to be uber accurate. But it just can't be done. The bearings provided by the crew isn't going to be any better than 1 degree. So no point in getting that halve degree with the protractor. It's better to average your plots over a longer time. More time to do it in so less taxing on the nerves. And more time to see if it changes behaviour. Averaging plots over 13 minutes means speed is accurate to a quarter knot.
Oh yeah, instead of the periscope or uzo, I often rely on the watch officer to report bearing and range when he's on top. You gotta delegate responsabilities right.
In my Gamefront filehosting page is also a tutorial on 4 bearing line interception by Nefelodam, it predates Kuikeg. But they are changing file hosting policy so don't expect it to be there for long. I'm going to set up my own file server instead. But that might take a while yet.