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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.

    Maricopa Class Rescue Ocean Tug
    Keel Laid May 29 1942 for Great Britain as BAT-2
    Reclassified Fleet Tug (AT) September 30 1942
    Launched October 23 1942 as AT-146
    Reclassified Rescue Ocean Tug (ATR) January 5 1943

  1. USS ATR-90
    Commissioned January 20 1943

  2. USS ATA-146
    Reclassified Auxiliary Fleet Tug (ATA) May 15 1944
    Decommissioned July 10 1946
    Transferred to Maritime Commission October 17 1947

  3. ARA YAMANA AS-6 (Argentine Naval Service)
    Transferred October 31 1947 under Security Assistance Program to Argentina and renamed

    Named MARICOPA July 16 1948

    Struck from Naval Register 1984
    Sunk 1985 in missile exercise

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 name of the ship (for example, Bushnell AG-32 / Sumner AGS-5 are different names for the same ship so there should be one set of pages for Bushnell and one set for Sumner). 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. Covers Page 1     (DATE RANGE)



This section lists examples of the postmarks used by the ship. There should be a separate set of postmarks for each name and/or commissioning period. 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
Killer Bar Text

Date From
Date To
Thumbnail Link To
Postmark Image
Thumbnail Link To
Cover Image


Locy Type 3z


The cover was posted either aboard another ship or ashore.


Other Information

Awards, Citations and Campaign Ribbons...
American Campaign Medal
World War II Victory Medal

NAMESAKE - An Indian people of the Gila River valley in Arizona; a county in southwest‑central Arizona



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.


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