S87-44061 (25 Sept 1987) --- Dr. Claude Nicollier, equipped with a pressurized extravehicular mobility unit (EMU), is in the process of being submerged in the 25-ft. deep pool of JSC's weightless environment training facility (WET-F) for a familiarization session. Dr. Nicollier's suit is weighted to facilitate a neutrally buoyant condition. He is assisted by two SCUBA-equipped divers. Dr. Nicollier, a Swiss scientist assigned to the STS-46 mission as a payload specialist, first came to the Johnson Space Center in July 1980. Along with Dr. Wubbo Ockels, another European Scientist, Dr. Nicollier underwent survival training and other basic astronaut-type training alongside the 1980 class of astronaut candidates. Some photos in this series show Dr. Nicollier in an extravehicular mobility unit (EMU). This is for familiarization purposes only as the scientist is not scheduled for any extravehicular activity.