She was acquired by the U.S. Navy from the U.S. Army on 4 January 1945, renamed Bastion, converted to an auxiliary minelayer and commissioned at Charleston, South Carolina 9 April 1945; Lt. Earl D. Fatkin, USNR, Commanding.

Jonquil serviced aids to navigation (ATON), participated in search and rescue (SAR) and law enforcement as needed.

From 26 to 27 February 1952 she assisted a grounded tug, M/V Mary Sheridan near the York Spit Light Chesapeake Bay, Virginia.

On 11 March 1952 she assisted the disabled F/V Elizabeth two miles southeast of Turner Lump near Chincoteague Bay, Virginia.

On 28 July 1969 Jonquil dewatered the schooner S/S Chawe Souris 19 miles west of the Frying Pan Shoals Light.

Jonquil was decommissioned on 15 September 1969 after 23 years of service in the U.S. Coast Guard.. [3] This article incorporates text from the public domain Dictionary of American Naval Fighting Ships.

This article incorporates public domain material from websites or documents of the United States Coast Guard.