Star Destroyer Tractor Beam

[Finarfin]

How do you activate it? I click the Tractor Beam icon and then left click the ship I want to hold, but the ISD doesn't seem to do much. Is there a maximum range you have to be within for it to actually try to trap the enemy?

[Grand Admiral Uehara]

The tractor beam ability has a maximum range at which it can affect an enemy ship. In vanilla, the ability doesn't completely stop the ship, either. It only drastically slows the target down. Also keep in mind that the ability cannot be used to target very small craft like fighters and bombers or capital ships (the Executor's tractor beam is an exception to this, as it can target capital ships).

[Nikomer]

To add to the above comment, tractor beams in FoC have this horrible bug where it will not stop the ship until it is issued a new command. You can test this with the Millennium Falcon, for example. Tell a Star Destroyer to tractor beam the Millennium Falcon moving in a straight line. The Millennium Falcon will not stop nor slow until the player controling it gives it a new order (attack, move, guard, stop, etc.).