Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
-
[1]research packet 965-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: MISMATCH — real identity: USS YMS-463** (YMS-1-class auxiliary motor minesweeper; identical PCS/YMS hull design).
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-463-pkt-965-packet-md
-
[2]NavSource Online, Mine Warfare Vessel Photo Archive, YMS-463 (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 6 May 1943 as Patrol Craft Sweeper PCS-1428 by the C. Hiltebrant Drydock Co., Kingston, NY; reclassified Auxiliary Motor Minesweeper YMS-463 on 27 September 1943; launched 21 March 1944; completed 15 July 1944; transferred to South Korea 10 May 1947 and named Kang Nung (YMS 507); struck from the Naval Register 23 December 1947; fate unknown. The same page lists class specifications: displacement 270 t., length 136 ft, beam 24 ft 6 in, draft 8 ft, speed 15 kts, complement 32, one 3"/50 dual-purpose mount, two 20mm mounts, two depth-charge projectors, and two 880 bhp General Motors 8-268A diesel engines with Snow and Knobstedt single reduction gear on two shafts.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1947
- Population
- C. Hiltebrant Drydock construction trades (1943-44); U.S. Navy crew (1944-47); Republic of Korea Navy crew (1947-)
- Limitations
- NavSource is a live secondary photo-archive compilation, not an official registry. It supports the stated timeline and specifications only; it records 'Completed 15 July 1944' rather than an explicit commissioning, and it contains no asbestos, survey, abatement, product, or exposure evidence.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-01
-
[3]NavSource timeline for YMS-463, read with the supplied Trill fact-QA correction (crew signs 960-977, 2026-09-29) [other_primary]
- Locator
- NavSource header chronology: laid down as PCS-1428 6 May 1943; reclassified YMS-463 27 September 1943; launched 21 March 1944; completed 15 July 1944
- Finding type
- vessel_history
- Finding
- CORRECTION: PCS-1428 was a pre-commissioning contract designation. The hull was redesignated YMS-463 on 27 September 1943, before her 21 March 1944 launch, and was commissioned as YMS-463 on 15 July 1944; she did not serve as PCS-1428.
- 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-463-02
-
[4]Weitz, R., Thomas, C., Klemm, J., Stuart, J., Knowles, M., et al., Analysis of Radiation Exposure for Naval Units of Operation CROSSROADS, Volume III (Appendix B) Support Ships, DNA-TR-82-05-V3, Science Applications, Inc., for Defense Nuclear Agency, 3 March 1982 (DOE OSTI 6354991; full-text PDF retrieved live 2026-10-04) [other_primary]
- Locator
- Appendix B support-ship information summary for USS YMS-463, printed pp. 439-441 (PDF pp. 443-446 of the 454-page file)
- Finding type
- environmental_record
- Finding
- The Defense Nuclear Agency technical report DNA-TR-82-05, Volume III (Appendix B, Support Ships) carries a ship information summary for USS YMS-463 at Operation CROSSROADS (Bikini Atoll, 1946). It records: Survey group; crew size 17; arrival at Bikini prior to the first detonation on 1 July 1946; mission of surveying probable effects of the nuclear tests on fish and other wildlife and conducting an oceanographic survey of currents in and around Bikini Atoll; a total reconstructed film-badge dose of 0.441 REM received while at Bikini; departure from Bikini 14 September 1946 (BAKER + 51); and a ship contamination factor of 3 at departure.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946-07-01 to 1946-09-14
- Population
- YMS-463 crew of 17 at Bikini (1946)
- Limitations
- This is a modeled radiation-dose reconstruction for the support ship's crew during Operation CROSSROADS, not an asbestos record. It documents participation and a reconstructed external gamma dose; it does not establish individual exposures, internal dose, asbestos conditions, or causation of any disease. The sponsoring Defense Nuclear Agency report is the primary record; an equivalent copy is hosted at dtra.mil (direct download returned HTTP 403 to automated fetch in this pass).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-03
-
[5]W. A. Shurcliff, Bombs on Bikini: The Story of Operations at Bikini (official Joint Task Force One publication, 1947), Appendix 8 'Support Vessels' - mirrored text at atomicarchive.com (live 2026-10-04) [other_primary]
- Locator
- Appendix 8, section (k) 'Survey Unit (Task Unit 1.8.5)'
- Finding type
- vessel_history
- Finding
- The official Operation CROSSROADS unit roster lists YMS-463 in the Survey Unit (Task Unit 1.8.5, commanded by Captain C. B. Schiano) with commanding officer Ens. R. H. Zisette - corroborating the DNA report's Survey-group assignment and placing the vessel in Joint Task Force One at Bikini in 1946.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946
- Limitations
- The cited page is a third-party mirror of the official 1947 JTF-1 publication, not the issuing agency's site. It establishes unit assignment and the commanding officer's name only; it establishes no asbestos, equipment, exposure, or condition fact.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-04
-
[6]Naval History and Heritage Command, Navy Department Library, 'United States Pacific Fleet Organization, 1 May 1945' (live page verified 2026-10-04) [nhhc_danfs]
- Locator
- MINECRAFT, PACIFIC FLEET section, ungrouped YMS entries (YMS 463 row)
- Finding type
- vessel_history
- Finding
- The Navy Department Library's transcription of United States Pacific Fleet organization as of 1 May 1945 lists YMS 463 in the MINECRAFT, PACIFIC FLEET section under Commander Minecraft, Pacific Fleet (R. Adm. A. Sharp); the entry carries no attached squadron or division annotation.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945-05-01
- Limitations
- Establishes administrative assignment to Minecraft, Pacific Fleet on 1 May 1945 only. It does not locate the vessel geographically on that date, establish operations, or contain any asbestos, equipment, or exposure information.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-05
-
[7]Naval History and Heritage Command photograph catalog 19-N-70355, cited through an archived capture because the formerly live NHHC page returned HTTP 404 on 2026-10-04 [nhhc_danfs]
- Locator
- Archived page title, caption, and catalog fields for 19-N-70355
- Finding type
- vessel_history
- Finding
- An NHHC photograph catalog entry identifies 19-N-70355 as 'USS YMS-463', a photo received from the New York Superintendent of Shipbuilding on 2 September 1944, with description 'Order from National Archives' and copyright owner National Archives.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-09-02
- Limitations
- Archived official catalog description establishes the photograph's identity and 2 September 1944 provenance only. It does not establish construction milestones, equipment, asbestos, individual exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-06
-
[8]National Archives, Special List #44, by Ship Numbers, entry YMS-463 [other_primary]
- Locator
- PDF table entry YMS-463
- Finding type
- historical_record
- Finding
- NARA's Special List #44, by Ship Numbers, lists YMS-463 with a deck-log coverage interval from 17 July 1944 through 30 June 1945. This establishes the existence and indexed date span of deck-log records for the hull, not commissioning, transfer, or individual service events.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1945 (indexed log span)
- Limitations
- This finding aid shows the indexed coverage dates of deck logs. It does not itself establish a specific event on either endpoint, commissioning, transfer, service history, asbestos aboard the vessel, individual exposure, or causation. The indexed span ends in June 1945 and does not cover the 1946 Bikini period or the 1947 Korean transfer.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-07
-
[9]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-463-08
-
[10]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-463
- 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-463 produced no digitized hull record during this pass; a request naming USS YMS-463 and dates of interest is the next source path.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-04
- Study period
- 1944-1947 records
- Limitations
- This is record-path guidance, not proof that a particular YMS-463 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-463-09
-
[11]Research result for this batch; see search ledger and access gaps [other_primary]
- Locator
- Searches documented in search_ledger
- Finding type
- asbestos_application
- Finding
- No ship-specific asbestos survey, abatement record, hazmat disclosure, or product-identification record was located in the sources reviewed for this batch. Ship-specific asbestos documentation is unknown.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- A bounded search result, not proof that records do not exist. NARA notes that many Navy records are not digitized, and the DNA report and fleet roster sources reviewed contain no asbestos information. No class-era inference is used to claim asbestos aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-10
-
[12]CourtListener authenticated API v4 helper sweep, 2026-10-04 [other_primary]
- Locator
- search_ledger rows sl-uss-yms-463-09 through sl-uss-yms-463-12; completed query response {count: 0, results: []}
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos litigation result was located in this pass. Of the four mandatory authenticated CourtListener base searches, the hull-number opinion query ("YMS-463", type=o, limit 20) completed with count 0. The exact-name opinion search and both docket searches were repeatedly declined by the authenticated helper's fleet-wide pacing gate before results 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
- The zero-result hull-number opinion search does not prove no litigation exists: it covers only the opinion index under the exact string 'YMS-463'. Three of four base queries returned pacing stand-down rather than results. No asbestos-qualified variants were run because no completed base query returned a 20-result overflow, and a zero base result implies a zero variant.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-463-11