02/28/2011. The WD 9 was another example of the series of single-engine seaplanes produced by Gotha, and one was delivered to the Reichsmarine (German Navy), serialed 572. Between May and June 1918, nine aircraft of the improved WD 9a version were delivered to Turkey. Powerplant was a Benz
Bz III engine, and the two-seat aircraft was armed with a 0.311 in (7.9 mm) machinegun fitted on a flexible mount.