Payload specialists Marc Garneau and Paul Scully-Power in SMS

41D-3139 (2 Sept 1984) --- Two prime crew member payload specialist and a backup for NASA's 41-G Space Shuttle mission participate in launch phase simulations at the Johnson Space Center. Securing themselves in temporary stations in the middeck of a trainer are Marc Garneau, representing the Canadian National Research Council (NRC), and Paul D. Scully-Power (background), a U.S. Navy oceanographer. Robert Thirsk, also with the NRC, is a backup payload specialist. This photograph was taken by Otis Imboden.