Evidence
7 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-7).
-
[1]research packet 964-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-461-pkt-964-packet-md
-
[2]NavSource Online, Mine Warfare Vessel Photo Archive, AMS-36 Swallow (live page verified 2026-10-04) [other_primary]
- Locator
- Header chronology and specifications block
- Finding type
- vessel_history
- Finding
- NavSource's live timeline identifies the hull as laid down 8 June 1943 as Patrol Craft Sweeper PCS-1416 at Stadium Yacht Basin, Cleveland; reclassified YMS-461 on 27 September 1943; launched 8 January 1944; completed 21 June 1944; and commissioned as USS YMS-461 on 22 June 1944. It records the later name and classifications Swallow (AMS-36, 18 February 1947) and MSC(O)-36 (7 February 1955), decommissioning/loan to Japan on 16 April 1955, return and strike on 1 May 1968, and reported sale for scrap on 5 September 1969.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1969
- Population
- Stadium Yacht Basin construction trades (1943-44); U.S. Navy crew (1944-55); Japanese crew (1955-68)
- Limitations
- NavSource is a live secondary photo-archive compilation, not an official registry. It supports the stated timeline only; it contains no asbestos, survey, abatement, product, crew, or exposure evidence. Commissioning is independently corroborated only by the batch's supplied fact-QA instruction, not a located live official register page.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-01
-
[3]Naval History and Heritage Command photograph NH 84992, archived capture because the formerly live NHHC page returned 404 on 2026-10-04 [nhhc_danfs]
- Locator
- Archived page description for Photo # NH 84992
- Finding type
- vessel_history
- Finding
- An NHHC photograph cataloged NH 84992 identifies USS YMS-461 with USS YMS-475 in San Francisco Bay shortly after World War II, circa late 1945 or early 1946, and states that YMS-461 later became USS Swallow (AMS-36).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- circa 1945-1946
- Limitations
- Archived official catalog description establishes the photograph's identity, place/approximate date, and later Swallow identity only. It does not establish construction milestones, equipment, asbestos, individual exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-02
-
[4]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (1979) [gao]
- Locator
- GAO product record HRD-80-2; direct product and PDF requests returned HTTP 403 during this pass
- Finding type
- gov_survey
- Finding
- GAO's 1979 report Navy Efforts To Protect Workers From Asbestos Exposure is Navy-wide historical context for asbestos use and worker-protection efforts; it is retained only as class/era context for a Navy vessel constructed in 1943-44.
- Verification
- partial
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1979 report; vessel construction 1943-44
- Population
- Navy asbestos program and workers (program-level context)
- Limitations
- The report was not retrievable live because GAO returned HTTP 403, so no detailed report proposition is attributed here. Navy-wide context cannot establish asbestos installation, product identity, quantity, condition, exposure, or causation aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-03
-
[5]CourtListener authenticated API v4 helper sweep, 2026-10-04 [other_primary]
- Locator
- search_ledger rows sl-uss-yms-461-05 through sl-uss-yms-461-08; helper stderr retained outside deliverables during research
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos litigation result was located in this pass. The mandatory exact-name/hull-number CourtListener opinion and docket searches were attempted through the authenticated fleet helper, but each request received the helper's fleet-wide pacing stand-down before results were returned; those are access gaps, not zero-result findings.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- This is not a conclusion that no litigation exists: CourtListener returned pacing stand-down before search results for all base searches. No asbestos-qualified variants were run because none of the base searches returned a 20-result overflow. A duplicate exact-name opinion attempt occurred after the initial process was interrupted by the headless executor; it too returned pacing stand-down and no result.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-04
-
[6]National Archives, An Introduction to Navy Deck Logs; Logbooks of the U.S. Navy at the National Archives [other_primary]
- Locator
- NARA deck-log guidance: RG 24 and 1941-and-later College Park holdings; catalog search https://catalog.archives.gov/search?q=YMS-461
- Finding type
- historical_record
- Finding
- Archival lead: NARA states that permanent deck logs of commissioned Navy ships are held in Record Group 24 and that 1941-and-later logs are generally at College Park. The public catalog search for YMS-461 produced no digitized hull record during this pass; a request naming USS YMS-461/Swallow and dates of interest is the next source path.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-04
- Study period
- 1944-1955 records
- Limitations
- This is record-path guidance, not proof that a particular YMS-461 log, construction file, or asbestos record survives. No box-level or paid reproduction request was made, and no asbestos finding is asserted.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-05
-
[7]NavSource timeline for Swallow/AMS-36, read with the supplied Trill fact-QA correction (crew signs 960-977, 2026-09-29) [other_primary]
- Locator
- NavSource header chronology: reclassified 27 September 1943; launched 8 January 1944; commissioned USS YMS-461 22 June 1944
- Finding type
- historical_record
- Finding
- CORRECTION: PCS-1416 was a pre-commissioning contract designation. The hull was redesignated YMS-461 on 27 September 1943, before her 8 January 1944 launch, and was commissioned as YMS-461 on 22 June 1944; she did not serve as PCS-1416.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1944
- Limitations
- Corrects designation framing only. The live source is a secondary compilation; the pre-commissioning interpretation is additionally mandated by the supplied fact-QA instruction. It establishes no asbestos fact.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-461-06