Evidence
5 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-5).
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[1]DANFS, Gavia (AM-363) - verbatim transcription via Haze Gray & Underway mirror, Wayback capture 2024-06-24 (live NHHC page returned 404 on 2026-09-22) [nhhc_danfs]
- Locator
- DANFS entry text, Gavia (AM-363); specification block in same entry
- Finding type
- vessel_history
- Finding
- DANFS documents: laid down as PCE-907 on 8 July 1943 by Willamette Iron & Steel Corp., Portland, Ore.; launched 18 September 1943 (sponsor Mrs. James E. Ray); reclassified AM-363 on 27 September 1943; commissioned 23 July 1945, Lt. K. P. Billhardt in command; Columbia River trials, then San Pedro/San Diego mine-warfare exercises; departed Pearl Harbor 26 October 1945; arrived Wakayama, Japan 27 November; December 1945 minesweeping in Tsushima Strait, Okino Shima, Tachibana Wan out of Sasebo; Buckner Bay, Okinawa, February 1946; reference ship for Japanese minesweepers off Miyako Jima; demilitarized at Subic Bay 19 March 1946; decommissioned at Shanghai 29 May 1946 and turned over to the State Department for transfer to the Chinese Maritime Customs (as Yung Chun, per transcriber's note); struck from the Navy List 19 July 1946; awarded two battle stars for World War II service. Complement 104.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1943-1962
- Population
- Construction trades (Willamette Iron & Steel, Portland, 1943-45); ship's company, ~104 (1945-46); Chinese Maritime Customs / ROC crew (1946-62)
- Limitations
- Documents identity, chronology, and operations only - the DANFS entry contains no materials, insulation, or asbestos information whatsoever. Live NHHC DANFS URL (history.navy.mil) returned HTTP 404 on 2026-09-22 for both known path patterns; the verbatim transcription mirror was used and the canonical NHHC URL needs re-locating before any production use.
- Atlas source
- true
- Evidence ID
- ev-uss-gavia-am363-01
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[2]NavSource Online, Mine Warfare Vessel Photo Archive - Gavia (AM-363) page (propulsion spec, commanding officers, Republic of China disposition dates) [other_primary]
- Locator
- NavSource AM-363 page, Specifications block and chronology; commanding-officer list
- Finding type
- vessel_history
- Finding
- NavSource documents a geared-diesel propulsion plant for this hull - two 855-shp Busch-Sulzer 539 diesel engines, Farrel-Birmingham single reduction gear, two shafts - no boilers or steam turbines. It further records the transfer path as State Department Foreign Liquidation Commission to Republic of China Maritime Customs, renamed Yung Chun (AM-52), and lists decommissioning/striking from the Chinese Navy list as 1 July 1962, with ultimate fate unknown.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 1943-1962
- Population
- Ship's company ~104 (1945-46); ROC crew (1946-62)
- Limitations
- NavSource is a volunteer-compiled secondary archive sourced from official records, not itself a primary document. Two conflicts are unresolved: (1) ROC strike date - NavSource says 1 July 1962 while Wikipedia and derivative compilations say 1 June 1962; (2) engine attribution - sister-ship spec sheets list ALCO 539 diesels where NavSource lists Busch-Sulzer 539 (same 539 engine family; Busch-Sulzer merged into ALCO in 1944). HyperWar's spec box separately misstates 'diesel-electric' drive and 'built at Puget Sound Bridge'; both are contradicted by DANFS and NavSource. No asbestos or materials content on the page.
- Atlas source
- true
- Evidence ID
- ev-uss-gavia-am363-02
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[3]NavSource AM-363 propulsion spec (documented geared-diesel plant) + DANFS construction dates (1943-45 build era); era context per GAO HRD-80-2 (see ev-uss-gavia-am363-04) [other_primary]
- Locator
- NavSource Specifications block (propulsion); DANFS construction-date entries
- Finding type
- asbestos_application
- Finding
- As built in 1943-45 under wartime Navy construction practice, asbestos of the era was commonly used in exhaust-system insulation, machinery-space gaskets and packing, electrical insulation and arc barriers, winch/windlass friction linings, and compartment insulation. Because this hull is geared-diesel with no boilers or steam plant, the dominant steam-ship pathways - boiler lagging, steam-line insulation, turbine insulation - do not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-22
- Study period
- 1943-1962
- Population
- Construction trades (1943-45); engineering crew; later maintenance/refit crews under ROC flag
- Limitations
- Era- and design-level inference only: neither NavSource nor DANFS contains any asbestos or insulation-materials statement for this hull. No wartime BuShips material schedule, yard build record, or survey for AM-363/PCE-907 was located. Does not establish that any specific asbestos product was installed, does not quantify, and does not establish or defeat any individual exposure claim.
- Atlas source
- true
- Evidence ID
- ev-uss-gavia-am363-03
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[4]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented the Navy's asbestos-protection program and asbestos-removal policies applicable to the World War II-built fleet - the construction era in which this hull was built - including fieldwork at naval shipyards that overhauled WWII-era vessels.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-22
- Study period
- 1979
- Population
- Navy shipyard workers (program scope)
- Limitations
- Program-level documentation, not hull-specific; establishes era context only and does not identify materials aboard AM-363 or any minesweeper. Full text not retrieved - gao.gov returns HTTP 403 to automated fetches; content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-gavia-am363-04
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[5]Batch-1306 search ledger (this record): NHHC DANFS live page; DANFS verbatim mirrors (hazegray via Wayback, HyperWar spec page); NavSource archive page; Naval Vessel Register; CourtListener API v4 + web UI; general-web litigation check; NARA catalog; NPS NHL nomination for sister USS Hazard (AM-240); shipyards.json yard cross-check [other_primary]
- Locator
- search_ledger rows sl-uss-gavia-am363-01 through sl-uss-gavia-am363-09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming USS Gavia / AM-363 / PCE-907 / Yung Chun was found in the public sources searched (see search_ledger). The ship's name appears only on law-firm marketing ship lists, which are excluded as sources under batch rules.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-22
- Study period
- 2026-09-22
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard; it establishes only that no ship-specific documentation was found in this pass. CourtListener docket-level confirmation is incomplete - the authenticated API was at its daily quota during this session (see sl-uss-gavia-am363-05) and the web UI returned HTTP 403, so 'no docketed case' is asserted on the general-web check only. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-gavia-am363-05