Some people have been known to use an abbreviated version. Establish the distance between the two (or more) fleets. Using their known speed capabilities and tendency (if any) to stay together, use that distance as a range, and open or close whole fleets or subgroups as speed allows. This converts 2 dimensions down to one, but does not depict the effort of the fleeing units (if any) to avoid their own blind spots. Such effort will knock 1 increment of speed off every second or third turn, on the average. I tend to fight battles out in full, myself, but . . .
robert