Just a thought, but he may have been asking if its possible to tell a specific ship to move sideways, as part of a mission sequence, like with events. If that is the question, then the answer is yes... sorta. You can't do something like tell it to follow waypoints by moving in an non-forward direction, but there is set-object-speed-y/x/z which can allow you to nudge an object in any direction, except that the directions are in relation to the mission environment, not in relation to the ship's own facings. Also, I don't know if this ever got resolved, but there was an issue where if you tried to move a ship in a direction that exactly corresponded to its own forward direction, it wouldn't do anything. That was a long time ago, but I do recall the bug.