51.   The complex choreography worried some American ground controllers, who would have preferred to keep the orbital drama simpler and potentially safer.

52.   The crews surprised ground controllers by getting to work ahead of schedule in starting to transfer needed and wanted supplies from the shuttle to the Mir.

53.   The final report issued last week indicated the crew became confused about their location and misunderstood the ground controller.

54.   The fliers transmitted a tape of the trip to ground controllers after reaching orbit.

55.   The government could also begin placing video monitors in airplane cabins, so pilots and ground controllers can monitor activity.

56.   The Kanas team began monitoring Mir crews and ground controllers last autumn.

57.   The safety board also said that although the air traffic controllers considered their workload moderate, the ground controller was using seven frequencies and monitoring almost constant communication.

58.   The Russians lack a sophisticated satellite communications network like that of the United States, which permits shuttle astronauts to maintain near-constant communication with ground controllers.

59.   The satellite navigation system is combined with telecommunications networks and computer systems which allow ground controllers and pilots to exchange information without speaking on the radio.

60.   The system permitted ground controllers in Houston to communicate with the station independently of the Russian control facility in suburban Moscow.