Well, clearly it’s not aligned to the world cords. Best thing to do is use the grid as a reference and rotate the ship straight in one viewport at a time. For example, first get it straight in the front viewport, then straighten it out in the side viewport. Then go back to the front and make finer adjustments, back to the side, etc. Once you’re sure that that the geometry is straight, then zero out the axis rotation in the coordinates manager.