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USS Undaunted (ATO-58) on 1 December 1944
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Class:        UNDAUNTED (AT-58)
Design:        Tug, 1917
Displacement (tons):        450 gross/displ.
Dimensions (feet):        143.0' oa, 135.0' pp x 28.0' x 14.8' mn
Original Armament:        1-3"/50
Later armaments:        none (1920)
Complement:        27 (1929)
Speed (kts.):        11.5
Propulsion (HP):        1,000
Machinery:        Vert. triple expansion, 1 screw

AT Name Acq. Builder Keel Launch Commiss.
58 UNDAUNTED 30 Jan 18 Union IW, San Francisco -- 1 Aug 17 5 Feb 18

AT Name Decomm. Strike Disposal Fate MA Sale
58 UNDAUNTED 1 Jul 46 25 Sep 46 19 Mar 47 MC 19 Mar 47

Class Notes:
In mid-1917 the Union Iron Works of San Francisco launched two seagoing tugs for the Rolph Navigation & Coal Co. of San Francisco, Cal., DREADNAUGHT (builder's hull 171) and UNDAUNTED (172). The tugs were built at the company's Alameda shipyard which until 1916 had been the United Engineering Works. The Navy inspected the two tugs for possible naval use on 14 Nov 17 and selected them in December for acquisition for distant service. It took over both under requisition purchase in January 1918, paying Rolph Navigation $222,500 for UNDAUNTED and probably a similar amount for her sister. The yard delivered the tugs in January and February 1918 respectively. DREADNAUGHT became YT-34 in 1920 while assigned to the 12th Naval District and is listed here on the page for World War I temporary tugs. (She may have become a YT instead of an AT like her sister because when the classifications were assigned in 1920 she was subordinate to a naval district and not a fleet unit.)

Soon after commissioning, UNDAUNTED departed San Francisco bound for the coast of France. She operated as a tug in support of United States naval forces in Europe through the end of World War I in November 1918. During the first half of 1919, she returned to San Francisco as a unit of the Pacific Fleet Train. She was designated AT-58 when the Navy's standard hull classification scheme was implemented on 17 Jul 20. During 1920 she was reassigned to the 12th Naval District and remained so assigned until 1939. On 31 Jan 36 she was redesignated as a district tug, YT-125. UNDAUNTED was placed in full commission on 1 May 39 at Mare Is. and reverted to "in service out of commission" status on 30 Jun 39, and it was probably during this time that she steamed from San Francisco to Norfolk and was assigned to the 5th Naval District. On 16 July 1940 she once again became an ocean tug and resumed her former designation, AT-58, and on 1 Aug 40 she was recommissioned. During World War II she towed ships and other craft between Norfolk, Baltimore, and Washington as well intermediate ports. At this time her armament consisted at most of one or two machine guns. On 15 May 1944, a mass redesignation of tugs occurred, and UNDAUNTED was reclassified an old ocean tug with the designation ATO-58. The tug was decommissioned for the last time on 1 July 1946 at Norfolk.

Ship Notes:
AT Name Notes
58 UNDAUNTED Ex merc. UNDAUNTED (SP-1950, completed Feb 18). To YT-125 31 Jan 36, to AT-58 16 Jul 40, to ATO-58 15 May 44. Sold to Marine Salvage and Sales Corp., Newport News, Va., for $2,900. Scrapped after 1951.

Page Notes:
AT        1917
Compiled:        19 Feb 2013
© Stephen S. Roberts, 2002-2013