I think adding a delta to make it so that the ship moves or looks at a point with some amount of error. So instead of moving directly to (4,6,7). Moving to (4.1,5.9,7.1), (3.9,6.2,6.8), (3.9,6.1,6.9), etc. would also be acceptable.
Another way to think of it is instead of moving to a point move...