Keywords: USS Astrea (SP-560).jpg en wikipedia 2012 July 15 Astrea SP-560 The United States Navy patrol vessel at the Boston Navy Yard in Boston Massachusetts http //www history navy mil/photos/sh-usn/usnsh-a/sp560 htm 1917 1919 U S Naval History and Heritage Command photograph; collection is in the public domain PD-USGov-Military-Navy Original upload log en wikipedia USS+Astrea+ 28SP-560 29 jpg 2010-11-20 18 40 Mdnavman 740×460× 78591 bytes <nowiki> The United States Navy patrol vessel Astrea SP-560 at the Boston Navy Yard in Boston Massachusetts http //www history navy mil/photos/sh-usn/usnsh-a/sp5</nowiki> Ships built in 1916 Patrol vessels Patrol vessels of the United States Naval ships of the United States World War I ships of the United States |