GT-5 would include radar and a rendezvous evaluation pod for rendezvous exercises early in the flight. The duration of this mission would be open-ended for a period of seven days, contingent upon the availability of fuel cells. GT-6 would be a standard rendezvous mission of perhaps two days' duration. GT-7 would be a long-duration mission with an open-ended potential of 14 days. George E. Mueller, NASA Associate Administrator, Office of Manned Space Flight, was currently reviewing these plans.