STS-34 Mission Specialist (MS) Chang-Diaz tests CCA prior to WETF exercises

S89-42667 (24 Aug 1989) --- Astronaut Franklin R. Chang-Diaz tests his communications gear with Pam S. Peters of RSO, prior to participating in an underwater simulation of a contingency extravehicular activity (EVA) for his mission specialist assignment on NASA's STS-34 mission. He stands on a platform that will lower him into a 25-ft. deep pool, part of JSC's weightless environmental test facility (WET-F). Also participating in the contingency EVA rehearsal was astronaut Ellen S. Baker (out of frame).