Yugoslav gunboat Beli Orao
Beli Orao (Serbo-Croatian for 'White Eagle') was a royal yacht built in 1938–39 for the Yugoslav Royal Navy, which intended her to serve as a patrol boat, escort, or guard ship in wartime. Upon completion, she was pressed into service as the admiralty yacht – used by senior admirals for transport and to review fleet exercises.
Source: Wikipedia — Yugoslav gunboat Beli Orao (CC BY-SA 4.0)