A drawing of Iona
History
Name	Iona (YTB-220)
Builder	Greenport Basin and Construction Company, Greenport, N.Y
Launched	26 August 1944
Sponsored by	Mrs. Martina E. Swanson
In service	2 February 1945
Reclassified	YTM-220 in February 1962
Out of service	May 1963
Fate	Burnt in June, 1963, following sinking in May.
General characteristics
Class and type	Cahto-class district harbor tug
Displacement	410 long tons (417 t)
Length	110 ft (34 m)
Beam	27 ft (8.2 m)
Draft	11 ft (3.4 m)
Speed	12 knots (22 km/h; 14 mph)
Complement	12
Armament	2 × .50-caliber machine guns

Iona (YT/YTB/YTM-220), a wooden tugboat originally classified YT-220, was launched by Greenport Basin and Construction Company, Greenport, New York, 26 August 1944; sponsored by Mrs. Martina E. Swanson; and placed in service 2 February 1945. She was the second United States Navy ship of that name.

The new tug was assigned harbor duty in the 14th Naval District based at Pearl Harbor, and she remained there until transferred to the Philippines in 1955. At Subic Bay Iona performed harbor duties necessary for the smooth functioning of a naval base. She was reclassified a 'District Harbor Tug Medium', YTM-220, in February 1962. In June, 1963, following an accidental sinking in May, she was disposed of by burning.

•  This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.