USS Carola IV, was a patrol ship of the United States Navy, built in 1885 by Culzean Shipbuilding & Engineering Company, Maidens, South Ayrshire, Scotland, as the steam yacht Black Pearl.

[1] and in 1900 she was purchased by Evans R Dick of Philadelphia, Pennsylvania and renamed Elsa.

[2][3] She was later briefly named Haida and Columbine, but by mid-1910 was owned by Leonard Richards of New York City, Commodore of the Larchmont Yacht Club.

Commissioned in early July, she crossed the Atlantic to Brest, France, during that month and the next, voyaging by way of Dominion of Newfoundland and the Azores.

After a brief patrol operation along the French coast, in October 1917 Carola IV was condemned as unseaworthy and reduced to harbor service as an accommodation vessel.