Good idea. True, I would also add: 1 Lighthouse should be located not less than, say, 10% of the border planets, satellites generally prohibited. 2 The ship should carry the same lighthouse, or jump from the vicinity of the current (1 - 10 km.). 3 between the entry point and exit point must not be obstructed. Otherwise HytlerCaput. That is, if in the midst of a planet or a satellite of the route of the ship remains tortilla. Translated by Google from Russian.