In the movie Event Horizon the ship uses "Core" to generate a black hole which in turn opens a wormhole which is in turn used to travel long distances. The core location is inside the ship,if one needs to go through a wormhole it should be created outside the ship and not within the ship. How can the ship pass through a wormhole created within itself?
In the movie script, Weir explicitly explains how the drive works; The swirling metal thing is used to focus the gravity of the black hole in front of the ship, which then travels through the 'gateway' created.
MILLER : What is in the Core?
WEIR: A black hole.
The crew stares at him, stunned.
WEIR: That's how the gravity drive works, you see: it focuses the black hole's immense gravitational power to create the gateway. That's how the Event Horizon travels faster than light.