Sometimes called the Seventh Directorate, this section was responsible for providing the tools, techniques, and manpower to accommodate the physical surveillance needs of the MGB. They offered facilities, devices, and methodology to help with the demands of the intelligence departments. They were able to do both outdoor (tailing) and photographic surveillance, as well as being able to tap phone lines, monitor conversations in other rooms through hidden microphones and covertly examining mail. They also had sections devoted to codes, cryptography, and ciphers.