Phase 1 of the interpretation of Historic Duxford will take place in what is currently known as Building 89. This building was used in the 1930s as a Watch Office, where the duty pilot or officer on watch would be stationed during flying activity.  It was built in 1917/1918, along with Hangar 3: Air and Sea. These are the first 1918 buildings that visitors encounter on their journey through the Museum.