Very rare poster
US Navy biplane strafing German U-boat SM U-53. The U-53, commanded by Hans Rose, was never sunk or captured and was one of the most highly decorated German U-boats of the First World War sinking 88 Allied ships during the war including the USS Jacob Jones.
Interesting list of trades needed during WWI Carpenters, Blacksmiths, Gas Engine Men, Woodworkers, Fabric Workers, Instrument Makers, Machinists, Riggers, Inexperienced Men, Coppersmiths, Acetylene Welders, For Quartermasters. The above involves no flying.