Sadler unexpectedly found himself Acting Superintendent and faced with the task of implementing the introduction of the Air Almanac and other new publications. This extra work required the appointment and training of new staff, some of whom remained members of the staff until their retirement. At this time the Office was based in Royal Naval College, but it was moved to the nearby Devonport House in July 1939 and then a few weeks later after the outbreak of the war to Bath, with other sections of the Admiralty.
| Chapter 4 | Change and expansion |
| Changes in administrative responsibility | |
| The work and staffing of the Office | |
| The post of N.A.O. secretary | |
| Initial recruitment of junior staff | |
| Expansion for air navigation | |
| Acquisition of new calculating machines | |
| Chapter 5 | New developments |
| The Occultation Supplement | |
| Air Almanac and Astronomical Navigation Tables | |
| Introduction of the Air Almanac | |
| Astronomical Navigation Tables for use in the air | |
| I.A.U. General Assembly in Stockholm (1938) | |
| A threatened dispute on copyright | |
| Apparent Places of Fundamental Stars | |
| Other publications | |
| Chapter 6 | Procedures and moves |
| A comment on official procedures | |
| Move to Devonport House | |
| Evacuation to Bath | |
| Appointment as Secretary of the Royal Astronomical Society | |
| Download | PART 2. AT GREENWICH 1936-1939 pages 39-56; 117 Kbytes |