Original set of Master Schematics from Grumman Aerospace titled, “Expanded Capability Tactical Jamming System”, as developed by Grumman for NASA as part of the Space Shuttle Development Contracts in 1972. Grumman became a key player in the space technology as the company designed and built the Apollo Lunar Module that was used for the moon landing. In the Post-Apollo era, NASA issued a development contract to Grumman under its new Space Shuttle program to design and develop an Orbiter vehicle which could be reused on multiple missions. These extremely rare original schematics are part of the master plans drafted by Grumman under the NASA development contracts. The plans are drafted on translucent polyester/plastic drafting film which was a common medium used for creating master drafting documents during this period. The full description of this set of plans as found in the Grumman Aerospace seal in the lower right-hand corner of the page is “EA-6B Expanded Capability Tactical Jamming System Level II Integrated Functional Configuration Diagram”. This set is dated October 8, 1971, and contains two sets of diagrams.