Battle in the air
An observer of the Royal Flying Corps in a reconnaissance aircraft
The Royal Flying Corps launched a determined effort to gain air superiority over the battlefield in support of the spring offensive. The Canadians considered activities such as artillery spotting, and photography of opposing trench systems, troop movements and gun emplacements essential to continue their offensive.[65] The Royal Flying Corps deployed 25 squadrons totalling 365 aircraft along the Arras sector, outnumbering the Imperial German Army Air Service by 2-to-1.[65] Byng was given use of No. 2 Squadron, No. 8 (Naval) Squadron, No. 25 Squadron, No. 40 Squadron and No. 43 Squadron, with No. 16 Squadron permanently attached to the Canadian Corps and employed exclusively for observation and artillery support.[66]
Aerial reconnaissance was often a hazardous task because of a requirement to fly at slow speeds and at low altitudes. The task was made all the more dangerous with the arrival of additional German flying squadrons, including Manfred von Richthofen's highly experienced and well equipped Jasta 11, which led to sharp increase in Royal Flying Corps casualties. Although significantly outnumbering the Germans, the Royal Flying Corps lost 131 aircraft during the first week of April alone.[66] Despite the losses suffered by the Royal Flying Corps, the Imperial German Army Air Service failed to prevent the Royal Flying Corps from carrying out its prime objective, namely the continued support of the army throughout the Arras Offensive with up-to-date aerial photographs and reconnaissance information.