Panama Canal Railway
The Panama Railway also operated a significant shipping line, connecting its service with New York and San Francisco. It ran a Central American line of steamships linking Nicaragua, Costa Rica, San Salvador, and Guatemala to Panama City. The shipping service was greatly expanded when canal construction began. Ships included the SS "Salvador", SS "Guatemala", SS "Cristobel", and , which became the first of the ships to cross the completed canal in 1914.
In 1904 the United States took over the license to build and operate the canal. The choice to use locks and an artificial lake (Gatun) meant that the old railway route from 1855 had to be changed because it followed the Chagres River valley, which would be flooded by the lake. Also, the railway would be extended and altered continuously for the building process. The stock of the Panama Railway Company, vital in canal construction, was entirely controlled by the United States Secretary of War.
SS Aleutian
"Havana" was sold to the Panama Railroad Steamship Company on behalf of the Isthmian Canal Commission in 1905. She was renamed "SS Panama" and would serve a crucial role in the construction of the Panama Canal. The steamship company was already running connecting service with New York and San Francisco. It also ran a Central American line of steamships linking Nicaragua, Costa Rica, San Salvador, and Guatemala to Panama City. The shipping service was greatly expanded as canal construction began. The line's heyday was during the construction period; once the canal was finished in 1914 the service shifted to the business of supporting the maintenance and operation of the canal and its supporting infrastructure, including the railroad.