United States Navy Auxiliary ship Sterling was an iron, schooner-rigged collier in service with the United States Navy from 1898 to 1919. Originally purchased to transport coal for United States Navy ships during the Spanish–American War, she served in that role until sold in 1919. While serving as the Chilean flagged steamer, Llai Llai, she was rammed by a Chilean warship on 11 March 1920 and sank near Iquique, Chile.

USS Marcellus was an iron schooner-rigged collier United States Navy Auxiliary ship in service with the United States Navy from 1898 to 1910. She participated in the U.S. Navy's first efforts in coaling warships while underway at sea. She was rammed by a commercial steamer in the early morning hours of 9 August 1910 and sank that afternoon without loss of life.