 As the air group had only two sets of maps F.342 had to fly in formation with the two Walrus' planes.When the planes approached Orkney F.342 had straggled behind the British aircraft and was intercepted by three Gloster Gladiators from Scapa Flow.The Gladiator crews misread the situation, believing that the Norwegian biplane was chasing the two Walrus' flying boats, and began to attack the M.F 11.