[I'm goin' down]

I started knowing nothing. I still know nothing. However...

1. Leave map contacts enabled.
2. When a contact appears, zoom in on the target.
3, Open the stopwatch.
4. Use the map tools to mark the target with an "x." Start the stopwatch.
5. Pause the game after 3 minutes.
6. Mark the target with an "x."
7. Use the protractor tool and draw a circle with its center being the target and the circumference line intersecting the target in its position after 3 minutes. (Since the game is paused the target will not have moved.) The protractor tool will display the number of yards in the radius of the circle. That is the distance (number of yards) the target has traveled during the 3 minute period. That distance is the target's speed in knots. (i.e. 1200 yds. in 3 minutes = 12 knots.)
8. If you open the compass icon on the map screen and click on the ruler, you will open a compass tool. Create a long line running through the two target's positions you have plotted on the map and extend the line on the map. Read the degrees on back of the compass dial and you have the target's course.

There is a post somewhere that shows all of the above with drawings, screenshots, etc.