Astronaut Gerald P. Carr, fully suited, Skylab 4 commander, prepares to enter spacecraft 118 the Skylab 4 vehicle at the start of a high altitude chamber test at the Kennedy Space Center KSC. Also participating in the test were Scientist-Astronaut Edward G. Gibson, science pilot, and Astronaut William R. Pogue, pilot. The Skylab 4 spacecraft is to be moved to the Vehicle Assembly Building VAB on August 12, where it will be mated with the launch vehicle as a possible rescue craft for the Skylab 3 crewmen if needed. 1. CARR, GERALD - SKYLAB IV 2. GIBSON, EDWARD - SKYLAB IV 3. POGUE, WILLIAM - SKYLAB IV 4. SPACECRAFT=SL-IV