1) Then you could just fly past outside of normal spacetime. FTL jammers are worthless, as is the mine field. I certainly can't attack something in a dimension I can't access. And warp drive doesn't remove you from real space, except in Star Trek, it just moves space around you. Hyperdrive would, but I can't access hyperspace. The field would have to be laid out as a continuous field, and prevent passing or slow down ships that pass through it to be of any use.
For example, Interdictors in Star Wars produce a gravity well that prevents hyperdrives from activating. They are used to block ships from jumping away from battle and to make them revert to normal space when they enter an area. If they couldn't pull ships out of hyperspace they couldn't be used to block starship travel through certain areas.
Yeah, warp drives absolutely can't move through this field while FTL, they are slowed down to just below lightspeed or whatever speed the ship was traveling at without spatial manipulation.
Hyperdrives and such can possibly avoid this by the fact they only touch the field when they exit to real space.
Though the field may also cover its share in hyperspace and such but even then they can just project a route around the field to reach their destination.
2) So I can somehow guess the exact point where you are going to leave hyperspace. I thought I only got a vector at best, as you could leave wherever you wanted, and my weapons can't enter another dimension.[/quote] There's always a delay between as the "portal" to these dimensions open and when you attack. Use that mirror to counterattack.
And it's more like you can follow their route through hyperspace if you have the technology.
Warp-capable ships are even easier to fight because you can still target them even if they move faster now.
This doesn't mention whether it's in a star system or interstellar space. Now that I know that, though, I can alter my plan for use in interstellar space.
"Basically this is an open space battle with a certain spin"
It does mention that.