Since World War I, the Keystone Shipping Company has been active in the worldwide support of the United States Armed Forces.
Keystone Shipping Company is part of the Ready Reserve Fleet program.
Keystone Shipping Company tanker fleet transports crude oil and other petroleum products to both coasts in the United States.
[11] Keystone Shipping Company was a major tanker operator during World War II.
Each Keystone Shipping Company had a merchant crew of about 9 officers and 39 men.