|So, Alex. The Fine Approach (r58 again after you select the planet) is the same as Vimana Drive (r57)? I thought that Fine Approach was merely like (forgive me the analogy with Star Trek) Impulse Power, and Vimana Drive was like Warp Drive.|
sputter! putt! putt!
Though it may explain the same phenomenon- without DOSBox- when I have noticed it in Multiple Star (S08) systems. Sometimes, there you may actually be able to see the target planet (for example, M01 orbiting the companion star P01, supposedly a few dyams away) and it takes a verrrry long time to travel to that world- even engaging the local drive takes a while. I always put this down as a "gravitational effect" of some sort. Particularly if the system has a number of close by companion stars. Though the problem you describe does make sense. IM3CR, targeting elsewhere and returning to the intended target does work sometimes.
[Though my thought was, in Eggofawesome's case there may have a bit of a problem with emulator settings. NIV runs on the DOSBox, but a little bit of lag can be normal.]