Panama Pacific Line

[1][3] When landslides in September 1915 closed the canal for an extended time, Kroonland and Finland were reassigned to the IMM's American Line.

[4] The outbreak of World War I and its strain on international shipping caused the intercoastal service to be suspended.

In 1923 Kroonland and Finland were returned to the reinstated intercoastal route along with the American Line passenger steamer Manchuria.

In June 1937 the United States Congress withdrew all maritime mail subsidies, which by then included a total of $450,000 per year to Panama Pacific for its three liners.

[9] The United States Maritime Commission took over the three liners and transferred them to Moore-McCormack Lines to start a New York — River Plate service under Franklin D. Roosevelt's Good Neighbor policy.

SS Kroonland transits the Panama Canal in 1915.
A Panama Pacific Line contract envelope, 1915
Manchuria at New municipal pier, San Diego, California 1925 where increased demand made San Diego a Panama Pacific port of call.