From NavalCoverMuseum
Jump to navigation Jump to search

Ship Name and Designation History

This section lists the names and designations that the ship had during its lifetime. The list is in chronological order.

    Sonoma Class Fleet Tug
    Keel Laid 23 November 1911 - Launched 11 April 1912

  1. USS ONTARIO (Tugboat)
  2. Commissioned 4 September 1912

  4. Designated Fleet Tug (AT) 17 February 1920

  6. Redesignated Fleet Tug (Old) (ATO) 15 May 1944
    Decommissioned 3 June 1946

    Struck from Naval Register 19 June 1946
    Sold 4 April 1947 to Floyd Harrington Wilmington, CA

    Fate unknown


Naval Covers

This section lists active links to the pages displaying covers associated with the ship. There should be a separate set of pages for each incarnation of the ship (ie, for each entry in the "Ship Name and Designation History" section). Covers should be presented in chronological order (or as best as can be determined).

Since a ship may have many covers, they may be split among many pages so it doesn't take forever for the pages to load. Each page link should be accompanied by a date range for covers on that page.

  1. USS Ontario AT-13 Covers Page 1    (1938-1941)



This section lists examples of the postmarks used by the ship. There should be a separate set of postmarks for each incarnation of the ship (ie, for each entry in the "Ship Name and Designation History" section). Within each set, the postmarks should be listed in order of their classification type. If more than one postmark has the same classification, then they should be further sorted by date of earliest known usage.

A postmark should not be included unless accompanied by a close-up image and/or an image of a cover showing that postmark. Date ranges MUST be based ONLY ON COVERS IN THE MUSEUM and are expected to change as more covers are added.
>>> If you have a better example for any of the postmarks, please feel free to replace the existing example.

Postmark Type Postmark
Thumbnail Link To
Close-Up Image
Thumbnail Link To
Full Cover Image


Locy Type



Note: Cachet describes why FDPS was different from the ship's commission date.


Locy Type



Rose Island, a small atoll on the outskirts of Samoa and a very scarce killer bar location (Dave Kent).

Locy Type
3r (A-BTB)


As AT-13

Locy Type
SLPts (38x3)


As AT-13

Locy Type
SLPtsl (28x3)


As AT-13


Other Information

USS ONTARIO was at Pearl Harbor December 7 1941 at The Pearl Harbor Navy Yard

USS ONTARIO earned the Combat Action Ribbon, the American Defense Service Medal, the World War I Victory Medal, the American Campaign Medal, the Asiatic-Pacific Campaign Medal with 1 Campaign star and the World War II Victory Medal.

NAMESAKE - Named for the North American Indian Tribe.



If you have images or information to add to this page, then either contact the Curator or edit this page yourself and add it. See Editing Ship Pages for detailed information on editing this page.


Copyright 2024 Naval Cover Museum