They say she has transwarp drive
Part of my new/old campaign involves the USS Odyssey an experimental development of the Intrepid class with advanced hull materials, improved shielding and deflectors, new bioneural gel-packs and a transwarp drive.
The transwarp drive is based on a new theory designed by the ASDB working with materiel captured from the Borg and information retrieved from Voyager and 7 of 9. It is a mixture of the old "great experiment' drive and the Borg 'transwarp conduit' system. Basically, the Federation will seed beacons all over its space for the transwarp drive to lock-on.
The ship travels up to warp 9.9 and then activates the transwarp engine, taking it to warp 10 and landing them on the beacon they locked onto.
Now obviously my problem is to prevent player abuse of an ability to move instantanouesly from place to place. Obviously the beacon system must be in place and since the system is experimental, Starfleet has only seeded a few in unpopulated systems for testing purposes. So any ideas how I can make the transwarp drive something that should only be used in emergencies. The Federation 'speed limit' thing is definately out the window.