Project Mercury Network Operations Directive, 61-1. NASA Goddard Space Flight Center, 30 November 1961, revised 27 August 1962. 4o Multi-ring notebook. The Goddard Space Flight Center was the hub of the worldwide tracking system used in Project Mercury. The manual provides details on control consoles including the launch conductor, capsule communicator, flight director, and data/voice recording equipment used at network sites. SIGNED BY SCOTT CARPENTER, GORDON COOPER, JOHN GLENN, AND WALLY SCHIRRA on the title revision page.