SS President Coolidge Newport News, Virginia built the two ships, completing "President Hoover" in 1930. The keel for "President Coolidge" was laid 22 April 1930 and the ship was delivered 1 October 1931. They were the largest merchant ships built in the United States up to that time. Each ship had turbo-electric transmission, with a pair of steam turbo generators generating current that powered propulsion motors on the propeller shafts. Westinghouse built the turbo generators and propulsion motors for "President Coolidge" but General Electric built the turbo generators and propulsion motors for "President Hoover". In the "President Coolidge" twelve Babcock & Wilcox superheater
Calvin Coolidge To extend an olive branch to Latin American leaders embittered over America's interventionist policies in Central America and the Caribbean, Coolidge led the U.S. delegation to the Sixth International Conference of American States, January 15–17, 1928, in Havana, Cuba, the only international trip Coolidge made during his presidency. He would be the last sitting American president to visit Cuba until Barack Obama in 2016. For Canada, Coolidge authorized the St. Lawrence Seaway, a system of locks and canals that would provide large vessels passage between the Atlantic Ocean and the Great Lakes. In the summer of 1927, Coolidge vacationed in