1 min readApollo-Soyuz Pilot Donald K. “Deke” Slayton – January 1974NASAOct 01, 2008 Image Article Astronaut Donald K. "Deke" Slayton was the docking module pilot for the 1975 Apollo-Soyuz Test Project mission. Astronaut Donald K. “Deke” Slayton was the docking module pilot for the 1975 Apollo-Soyuz Test Project mission. Image Credit: NASA