Its basically a torpedo (torpedo cooldowns) which spaws net of transhasic mines as if you used dispersal pattern beta III.
It shares the same cool down with mines; it cycles when mines are deployed. It's improved by mine skills and transphasic projectiles.
I'm using it on my mine-laying escort (engineer captain), and it's a lot of fun. Take down a target's shields with a volley of cannon fire, launch the Transphasic Cluster Torpedo and watch as the ship's loses about 25-50% of it's hull. On one instance I had about 7 or 8 of the mines get critical hits, so they were hitting bare hull for 1000-1200 damage each.
Originally Posted by Dalnar
It would be great if you could chose the type of mines. But its using the crapiest (tm) projectile in STO.
With the torps the bonus is pointless once your target's shields drop. With mines it actually helps when you're taking on multiple targets.