SS Ancon was an American 
steamship that became the first ship to officially transit the 
Panama Canal in 1914. The steamer began life as the SS 
Shawmut, built for the Boston Steamship Line in 1902.
 About 1910 she was purchased by the 
Panama Railroad Company to provide shipping required for the construction of the 
Panama Canal. The name was changed to 
Ancon after 
Ancon Hill and 
Ancon township in 
Panama, home to the head of the Canal Commission.
 
Ancon and her sister ship Cristobal played a crucial role in building the canal, bringing workers and supplies, notably massive amounts of cement, from New York to Panama for the construction project.
On August 15, 1914 Ancon made the first official transit of the canal as part the canal's opening ceremonies. (Her sister ship Cristobal had made the first unofficial transit on August 3, delivering a load of cement, while an old French crane boat Alexandre La Valley had crossed the canal from the Atlantic in stages during construction, finally reaching the Pacific on January 7.)
The Panama Railroad Company replaced SS 
Ancon in 1938 with a 
second SS Ancon, a larger steam turbine cargo liner which later saw considerable action as US Navy Transport 
USS Ancon in 
World War II.