There are spaceships. They have powerful and efficient engines, but not powerful and efficient enough to ignore gravity or delta V issues.
Sometimes they battle each other in complex systems (like a lot of moons orbiting a gas giant) where there are many crucial maintenance stations, and other civilian infrastructure, that neither site wants to destroy. So orbital tricks matter a lot: Can we set a course to reach Neutral Station 3 while not giving too fast encounter to those missiles and avoiding line of sight with the enemy cruiser while burning?
I am looking for some useful and creative solution to visualize (or otherwise communicate to the crew) orbital information and possible courses (based on remaining delta V) of many objects, which is not simply projecting all orbits in a hologramm.
My first idea was to use seven dimensions, three for position, three for velocity, and one for time. Every point in this 7D space corresponds one state, (being in r at t time with v velocity) which a spaceship is may able or not able to reach. So the possible rendezvouses with the enemy will take the form of some higher dimensional plane or solid.
But then I realized, that although this approach may work for a tactical analysis computer, you can't communicate 7D to humans. But I don't want to stick to boring, old 3D conics.