Observation Aircraft Auster III – Stinson OY-1 – Cessna O-1
From the beginning of military aviation observation has been a key role, allowing commanders to assess the situation on the battlefield more realistically, spot for artillery and direct strikes by more heavily armed aircraft on ground targets. Aircraft with wings above their cabins gave observers excellent views of activity on the ground below Being light they can also operate from simple and small airstrips to carry small loads or passengers to important positions.
Leigh Edmonds little box of stuff 