He knew the jets were going on a bombing mission, and not an aircraft interception.

The ERS includes radars, incoming missile detection, an anti-crash system, damage control system, tactical map, information relay, aircraft interception trajectories and weapons trajectory control.

Radar picket submarines (Navy classification "SSR") were developed during the post-war period to provide intelligence information, electronic surveillance, and fighter aircraft interception control for forward-deployed naval forces.

In March 1952, radar data was sent from Bedford to the Whirlwind computer at MIT over an 8-digit telephone link developed by the ERD, allowing the first fully automated aircraft interception using SAGE.

They were returning to London from the Air Ministry Research Establishment at Bawdsey Manor near Felixstowe, where Scholder, under a suitably contrived alias, had met Watson-Watt, Henry Tizard, and other government scientists to offer some thoughts on radar, aircraft interception, fighter ground-control systems, and related topics.