Experiments in gravity wave manipulation have allowed Kushan engineers to develop a gravity well generator, capable of halting any space vessel under a specified thrust limit. While capital ship drives can easily compensate for the artificial gravity, strike craft simply do not have the necessary power needed to break out of the field, and are effectively pinned in place until they are destroyed or the field collapses.

While the Trapper special operations ship can be devastating when employed against large formations of strike craft, it is not yet a perfected technology. Effectively rushed into service, the gravwell generator is extremely unstable; once started, the entire mechanism keeps running until it eventually overloads and burns out. The current Mk. 4 vessel has gone into production with gravity effect generators that simply melt down in a shielded area of the ship. The previous 3 prototypes were completely destroyed when the gravity field collapsed into a micro black hole.

Given the cost in time and resources in creating these vessels, and their one-shot-only effect, most Trappers are employed as a last ditch defense against overwhelming attack by strike craft. Occasionally Trappers will be employed offensively to pin a massive fighter screen, while the bulk of the attack force bypasses them and continues on to the target.
Trappers are obviously extremely vulnerable to capital ships, and function best when operating in the sensor shadow of a destroyer or larger ship. In a large conflict they can often function unseen this way, hidden up close against a larger ship.