. . . "USS Elf (SP-81) was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919. Elf was a civilian motorboat completed in early 1917 by . In early May 1917, the U.S. Navy acquired her under a free lease from her owner, Louis H. Eisenlohr of Philadelphia, Pennsylvania, for World War I service as a patrol boat. She was commissioned as USS Elf (SP-81) on 3 May 1917. Elf performed patrol duty in the 4th Naval District until July 1918, when she was transferred to the 7th Naval District. Elf was decommissioned on 9 January 1919 and returned to her owner on 10 January 1919."@en . . . . . . . . . . . . . "8"^^ . "USS Elf (SP-81)"@en . "16.1544"^^ . . . . . . . . "--01-10"^^ . . . . . . . "0.9144"^^ . . . . "3623"^^ . "Previous name retained"@en . "USS Elf"@en . . . "1917-05-03"^^ . . "United States"@en . . "1917"^^ . . "1089589471"^^ . . "1919-01-09"^^ . . . "mean"@en . "1919-01-09"^^ . . "USS Elf (SP-81) was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919. Elf was a civilian motorboat completed in early 1917 by . In early May 1917, the U.S. Navy acquired her under a free lease from her owner, Louis H. Eisenlohr of Philadelphia, Pennsylvania, for World War I service as a patrol boat. She was commissioned as USS Elf (SP-81) on 3 May 1917. Elf performed patrol duty in the 4th Naval District until July 1918, when she was transferred to the 7th Naval District."@en . . . "16154.4"^^ . . . . "Returned to owner 10 January 1919" . . . "Operated as private motorboat Elf 1917 and from 1919"@en . . . . "May 1917"@en . . . . . . . . "3.6576"^^ . . "USS Elf"@en . . . . . . "1917-05-03"^^ . . . "1"^^ . . . . . "22191085"^^ . "22"^^ . . .