I think it pushes the number of spaces it says for 'damage' (ie, 3 is 3 spaces) same as trac beam. The 'cool' combo is to trac them in, hit them with hvy damage close range weapons (grav or null space) and then repulse them out. Repulser works great on big mounts on Defense bases, gets better range.(or an ER modded mount).
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"The Empress took your name away," said Chance.
Owen smiled coldly. "It wasn't hers to take. I'm a Deathstalker until I die. And we never forget a slight or an enemy." -Owen Deathstalker.