USS Jasper
patrol vessel of the United States Navy
USS Jasper (PYc-13) was a coastal patrol yacht in the service of the United States Navy. She was named for the gemstone Jasper.
The first Jasper (PYc-13), a diesel-powered yacht, was built as Stranger by Lake Union Dry Dock Co., Seattle, Washington, in 1938; purchased 1 July 1941, from her owner, Fred E. Lewis; renamed Jasper; and placed in service at San Diego, California, 8 July 1941.
World War II service
After the installation of experimental sound and electronic equipment, Jasper was assigned to the 11th Naval District to perform research work at the Naval Sound Laboratory, San Diego. She continued this important scientific work throughout the war taking part in experiments with radio and sound waves in cooperation with the University of California, Division of War Research. Echo-ranging equipment on board Jasper was used in 1946, to discover a deep 300-mile-wide oceanic layer off the coast of California.
The ship was placed out of service 14 August 1947, at San Diego and turned over to the United States Maritime Commission for disposal in June 1948.
References
This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
Begin with the source’s own compact description: “USS Jasper” is patrol vessel of the United States Navy. The dossier treats that line as a proposition to test through Jasper, patrol and vessel, not as a finished interpretation.
Why this record matters
The phrase “patrol vessel of the United States Navy” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Mar 5, 2026. The linked authority identifier is Q23003027. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1938, 1941, 1946 and 1947.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “USS Jasper”, its source revision and the description used here.
- Expand the search: follow USS Jasper primary sources, USS Jasper archive and Jasper research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “USS Jasper”?
- Which institution is responsible for the underlying evidence?
- Which cited source is closest to the event, object or claim?
Search terms from this dossier
This entry incorporates text from “USS Jasper” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.