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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.

    Gato Class Submarine
    Keel Laid February 1 1941 - Launched October 22 1941

    Commissioned January 30 1942
    Lost to enemy action March 28 1945, 89 men aboard
    Struck from the Naval Register July 11 1945.
Trigger SS237 Crest.jpg

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     (1941-42,1983)



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

Thumbnail Link
Postmark Image
Thumbnail Link
Cover Image


Locy Type


GregCiesielski Trigger SS237 19420202 1 Postmark.jpg
GregCiesielski Trigger SS237 19420202 1 Front.jpg

First Day of Postal Service, cachet by Dr. S. E. Hutnick


Locy Type
3z (BBT)


GregCiesielski Trigger SS237 19420210 1 Postmark.jpg
GregCiesielski Trigger SS237 19420210 1 Front.jpg

Cachet by Tazewell G. Nicholson


Locy Type Fz

USCS Postmark
Catalog Illus. T-27


GregCiesielski Trigger SS237 19420613 1 Postmark.jpg
GregCiesielski Trigger SS237 19420613 1 Front.jpg



USPO Slogan
Machine Cancel

"Mare Island Station"

Vallejo, CA


GregCiesielski Trigger SS237 19411022 1 Front.jpg


Launching, cover by Martin R. Aden


USPS 4-bar

Vallejo, CA


GregCiesielski Trigger SS237 19450326 1 Front.jpg


Memorial cover by Alton (Budd) M. Arrington


Other Information

USS TRIGGER earned the following awards during her Naval career - Presidential Unit Citation (3) - American Campaign Medal - Asiatic-Pacific Campaign Medal (w/ 11 Battle stars).

NAMESAKE - The triggerfish is any of numerous deep-bodied fishes of warm seas having an anterior dorsal fin with two or three stout erectile spines.

Two submarines of the US Navy have borne the name TRIGGER - USS Trigger SS-237 and USS Trigger SS-564.



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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