if you have determined the the speed of the target, and you know that speed is distance traveled over time, then you should be able to extend that targets course out and at regular intervals mark where the target should be. you know it traveled 1200 yards in 3 minutes. in the next 3 minutes he should be 1200 yards further down the track. at that speed it will travel 400 yards every minute.
you can get a range by changing your bearing, usually 90 degrees, and marking more lines of bearing. i guess it works off the more points of data you have, the better picture you will see.
the thing about time being the constant, time is going to remain the same. a second is a second is a second. unless we can get the boats to go a healthy fraction of the speed of light, it will be the same. if we do get them to go that fast, i have the con
