X 1 SSX 1

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.

USS X-1 SSX-1
Place in Service October 7 1955 - Placed out of Service December 2 1957
Placed in service November 14 1960 - Taken out of service February 16 1973

Struck from the Naval register on February 16 1973
Placed on permanent display August 20 1974 at the Submarine Force Museum, Groton, CT.

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.

Covers Page 1 (1957)

Postmarks

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 to Date To	Thumbnail Link To Postmark Image	Thumbnail Link To Cover Image

No Postmarks Reported

USPO
Machine Postmark

New London, CT
Submarine Base Branch

1956-03-31

Note:

USPO Duplex

"Naval Station"

Key West FL

1957-05-27

N/A

Cacheted

Other Information

ADDITIONAL DATA - USS X-1, the U.S. Navy's only midget submarine, was built by the Engine Division of Fairfield Engine and Airplane Corporation. It served for research and testing to assist the Navy in evaluating its ability to defend harbors against other small submarines. The tests helped to determine the offensive capabilities and limitations of this type of submersible. It was originally powered by a hydrogen peroxide/diesel engine and battery system. However, an explosion of its fuel supply in May 1957 resulted in its conversion to diesel-electric drive.

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.