|Namesake:||The largest 18th-century Indian settlement in Pennsylvania|
|Builder:||Reaney, Son & Archbold|
|Acquired:||31 July 1865|
|Commissioned:||17 October 1865|
|Decommissioned:||24 December 1868|
|In service:||31 July 1865|
|Out of service:||24 December 1878|
|Fate:||Wrecked off Costa Rica, 30 September 1878|
|Tonnage:||1,030 long tons (1,047 t)|
|Length:||255 ft (78 m)|
|Beam:||35 ft (11 m)|
|Draft:||12 ft (3.7 m)|
The first USS Shamokin was a double-ended gunboat built during the American Civil War at Chester, Pennsylvania by Reaney, Son & Archbold.
Shamokin was delivered to the Navy at the Philadelphia Navy Yard on 31 July 1865, and commissioned there on 17 October 1865, Comdr. Pierce Crosby in command.
Completed too late for service in the Civil War, Shamokin proceeded via New York City to the coast of Brazil. After three years of service in the South Atlantic Squadron, protecting American citizens and interests along the coast of South America, Shamokin returned home and was decommissioned and laid up at the Washington Navy Yard on 24 December 1868. She was sold there on 21 October 1869 to a Mr. T. Clyde.
After an extensive rebuild for commercial service, Shamokin was renamed Georgia. Georgia operated for nearly a decade before being wrecked off Costa Rica on 30 September 1878.
USS Seneca was a Unadilla-class gunboat built on behalf of the United States Navy for service during the American Civil War. Seneca was outfitted with guns for horizontal fire as well as with two howitzers for bombardment of shore targets. With her crew of 84, she was assigned to the Union blockade of the Confederate States of America.
The second USS Milwaukee (C-21) was a St. Louis-class protected cruiser in the United States Navy. Entering service in 1906, Milwaukee was deployed to the Pacific Ocean. On 13 January 1917, while aiding a grounded submarine, the cruiser grounded herself. The ship was decommissioned and sold for scrap in 1919.
The second USS Savannah was a frigate in the United States Navy. She was named after the city of Savannah, Georgia.
USS Standish was an iron-hulled screw tug of the United States Navy.
The third USS Casco (AVP-12) was a United States Navy Barnegat-class small seaplane tender in commission from 1941 to 1947. She saw service in World War II. After her decommissioning, the U.S. Navy loaned her to the United States Coast Guard, in which she served as the cutter USCGC Casco (WAVP-370), later WHEC-370, from 1949 to 1969.
USS Calhoun was a captured Confederate steamer and blockade runner acquired by the Union Navy from the prize court during the American Civil War.
USS O. M. Pettit (1857) was a steamer acquired by the Union Navy during the American Civil War. She was used by the Navy as a tugboat to service Union Navy ships blockading ports of the Confederate States of America.
The first USS Wando was a steamer captured by the Union Navy during the American Civil War. In commission from 1864 to 1865, she was used by the United States Navy as a gunboat in support of the Union Navy blockade of Confederate waterways.
USS Muscoota, was a 1370-ton Mohongo-class iron "double-ender" steam gunboat of the United States Navy during the American Civil War.
SS Harvard, briefly USS Charles (ID-1298), was a troop transport that served in the United States Navy from 1918 to 1920. She was better known in her role as one of the premier West Coast Steamships operated by the Los Angeles Steamship Company under her original name SS. Harvard.
USS De Grasse (ID-1217) was the projected name for an armed yacht that the United States Navy acquired for service as a patrol vessel in 1918 but, according to some sources, never commissioned, although other sources claim she saw brief naval service in 1918. In World War II, she was reacquired and served as YP-506. The yacht's official number was registered under the name Fleet as of 1959, fate unknown.
Note: This ship should not be confused with the third USS Resolute (SP-1309) or fourth USS Resolute (SP-3218), which were in commission at the same time.
USS Atglen (ID-1315), also sometimes listed as ID-1350, was a United States Navy barge in service from 1917 to 1919.
The first USS Sappho (ID-1427) was a United States Navy ferry transport in commission from 1918 to 1919.
USS Kermanshah (ID-1473) was a cargo ship that served in the United States Navy from 1918 to 1919.
USS Craster Hall (ID-1486) was a cargo ship that served in the United States Navy from 1918 to 1919.
USS Shadow III (SP-102) was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.
The second USS Cossack (SP-695) was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.
USS Helori (SP-181), later YP-181, was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1922.
The second USS Volunteer (ID-3242) was a United States Navy collier in commission from 1918 to 1919.