InWorld War I, aircraft were deployed during early phases of battle in reconnaissance roles as 'eyes of thearmy' to aid ground forces.[2] Aerial reconnaissance from this time through 1945 was mostly carried out by adapted versions of standardfighters andbombers equipped withfilmcameras.[3] Photography became the primary and best-known method of intelligence collection for reconnaissance aircraft by the end ofWorld War II.
World War I also saw use offloatplanes to locate enemy warships. After thebattle of Jutland demonstrated the limitations ofseaplane tenders, provisions were made forcapital ships to carry, launch, and recoverobservation seaplanes. These seaplanes could scout for enemy warships beyond the visual range of the ship's lookouts, and could spot thefall of shot during long range artillery engagements. Observation seaplanes were replaced byhelicopters after World War II.[4]