View Correspondence
| Folder Folder 45 Air Position Indicator: Correspondence, Oct. 9, 1940 - Sept. 15, 1941 Reel HD 002 |
| Folder Folder 46 Air Trainers Limited: List of feedback and amplifier drawings Reel HD 003 |
| Folder Folder 47 Automatic Radio Direction Finding: Specifications, Feb. 12, 1943 Reel HD 002 |
| Folder Folder 48 Automatic Rangers: Specifications, 1945 HD 002 |
| Folder Folder 49 Ball Bank Indicators: Specifications, 1945 Reel HD 003 |
| Folder Folder 50 Bombsight and Flight Control: Correspondence January 15, 1941 - November?, 1943 Reel HD 002 |
| Folder Folder 51 Celestial Dome Positioning (Automatic): Specifications, 1942 Reel HD 002 |
| Folder Folder 52 Celestial Navigation Dome Stars: Specifications/patent application, June 18, 1943 Reel HD 002 |
| Folder Folder 53 Collimator set-up in CNT buildings: Specifications, Jan. 4, 1944 - Jan. 7, 1944 Reel HD 002 |
| Folder Folder 54 Constant altitude control for helicopters, Oct. 22, 1943 Reel HD 002 |
| Folder Folder 55 Crane Radio Range Instructor: Specifications, Dec. 1, 1937 - Aug. 23, 1941 Reel HD 002 |
| Folder Folder 56 Electronic Follow-Up System: Specifications, February 22, 1946 Reel HD 003 |
| Folder Folder 57 “Sense” antenna on CNT radio: Specifications, Sept. 29, 1941 Reel HD 002 |
| Folder Folder 58 Sextant Averaging Devices: Specifications, March 6, 1943 Reel HD 002 |
| Folder Folder 59 Sextant Test Collimators: Correspondence, Oct. 26, 1940 - Sept. 11, 1941 Reel HD 002 |
| Folder Folder 60 Sextants (Octants) and Collimators: Correspondence, June 5, 1941 - Sept. 13, 1946 Reel HD 002 |
| Folder Folder 61 Sextants (Octants) and Collimators: Correspondence, June 6, 1951 - May 11, 1954 Reel HD 002 |
| Folder Folder 62 Sextants: Sales records (commercial), December 15, 1944 Reel HD 002 |
| Folder Folder 63 Shand and Jurs Telepulse II Transmitter: press release Reel HD 002 |
| Folder Folder 64 Star Globe: Correspondence and patent application, Nov. 1, 1939 - Oct. 28, 1940 Reel HD 002 |
| Folder Folder 65 Wind Drift Device: Correspondence, July 26, 1940 - Nov. 19, 1941 Reel HD 002 |
| Folder Folder 66 Wind Drift Device (Auxiliary): Specifications Reel HD 002 |
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