On manual targetting how do I compute target speed?

[akdavis]

Simplest way in my opinion (short of guessing), is to range and mark the target on the map, wait 6 minutes and range and mark the target again. Measure the distance between the two marks (in nautical miles) and multiply by 10. You now have the target's speed in knots. This is made even simpler with the addition of target icons and/or a nomograph.