The second USS Lynx (SP-2) was an armed motorboat that served in the United States Navy as a patrol vessel and aviation support craft from 1917 to 1919. Lynx was built as a private motorboat of the same name in 1916 by the George Lawley & Son at Neponset, Massachusetts. Her owner, Nathaniel F. Ayers, had her built specifically for participation in the Coast Defense Reserve as part of the Preparedness Movement. During her time in private hands in 1916 and early 1917, she participated in Coast Defense Reserve exercises.