Keywords: Curtiss HS-2 NAN10-48.jpg A U S Navy Curtiss HS-2L flying boat during the First World War Note that the observer in the bow has just dropped a message visible below the plane U S Navy Naval Aviation News October 1948 http //www history navy mil/nan/backissues/1940s/1948/Oct48 pdf ca 1918 USN PD-USGov-Military-Navy Curtiss HS |