John Corcoran safely navigated all traverses mounted from Casey during 1980. He was responsible for accurately positioning marker stations in unexplored territory. These stations marked the New International Antarctic Glaciological Program line.
John readily accepted the challenging Antarctic environment. He was willing to work outdoors in extreme weather conditions during long-range polar traverses. He was known for his exceptional professional ability and unflagging cheerful nature. These qualities contributed to the high degree of success enjoyed by Casey in 1980.