Of course, a lot of problems to be solved: to create a convergence system, docking, moon landing, take-off from the Moon, control descent into the atmosphere after returning from the Moon, the development of new suits, new electrical system, etc. The project made a lot of organizations. Throughout the design was carried out, we were made layouts designed stands, experiments were conducted. I then had to deal with the manual system the descent to Earth. The system was designed as a backup. For all critical operations in space ships used as the main circuit of the system. Automatic (of course, if it is OK) always works in strict accordance with the logic that lies in his scheme. It is fundamentally better than a manual system that is independent of the state of man, his mood, state of health, on whether retained or he has lost the skills. But if all of a sudden there is a situation which was not foreseen during the design of the machine, or if you need to manage according to the rules, which can not be formally described, then the priority is given to man. Therefore, in order to hedge against possible failures, for each automatic mode it provides usually a backup manual control mode.