Star Trek Voyager RPG d20 System

Stern Chases
This is a common feature of space combat. A ship flees and another gives chase. Now, if the fleeing
ship is faster then they get away. If the following ship is faster then it is a stern chase.
The pursuer needs to get into weapon range, which it can do at warp (See Fighting at Warp Speed)
below. Or they both drop out of warp and regular space combat occurs.
The fleeing ship may opt to drop in and out of warp. When the fleeing ship drops out of warp
unexpectedly the pursuer has a chance to react if they wish to stick to the fleeing ship like glue.
Under normal circumstances it is a DC 10 Pilot skill roll to stay within whatever range the pursuer
desires with the following modifiers.
Modifier
Add to DC
+1 Warp Speed beyond 2 +1
Fleeing vessel is Shuttle sized +2
Perusing vessel is Shuttle sized -2
Failure means that the pursuer either over or undershoots, then must either use a Plot Course to go
into warp again or use Impulse to close the gap.
The over/under shoot is 1 minute away (1 space turn) at Full Impulse per point that the roll failed.