I didn't see this in the sticky, so here it is. In the Intrepid Retrofit, if you enable visuals on the Breen reward supercooled engines, you get the nice, frosty trails, but you also get a ghost pair of trails that hover behind and to the side of you. They track your every move. It happens with other visuals on and off (e.g. reman shields, aegis stuff, etc). The Aegis engine effect is OK.
It happens in multiple zones.
I've had my Delta Flyer pet out and not out, and the effect is still there in both cases.