Other early operators of seaplanes were Germany, within its "Marine-Fliegerabteilung" naval aviation units within the "Kaiserliche Marine", and Russia. In May 1913 Germany established a naval zeppelin detachment in Berlin-Johannisthal and an airplane squadron in Putzig (Puck, Poland). The Japanese established the Imperial Japanese Navy Air Service, modelled on the RNAS, in 1913. On 24 January 1913 came the first wartime naval aviation interservice cooperation mission. Greek pilots on a seaplane observed and drew a diagram of the positions of the Turkish fleet against which they dropped four bombs. This event was widely commented upon in the press, both Greek and international.