
How did this come into the topic ?
Anyway...
How about the artificial gravity generators interact with the distortion field created by the subspace drive to cause a gravitational lensing effect on the particles of space dust within the subspace field that impact the fighter.
This exerts a kind of limited friction on the fighter to slow it down.
This means a fighter can hover inside a planet, however unfortunately this means that any fighter that is equipped with a gravity generator and a subspace drive is unable to exit a planets atmosphere due to not being reach the required velocity of 11.3 km/s to escape the gravitational well of a Sol III class planet.
Or do fighters need to be able to exit the planet as well now we have sky boxes?
Anyway, I think this is better than a gravity manipulation field being used as propulsion. If the GTVA could do that, then they wouln't be using a fusion drive as the primary form of propulsion.