Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
-
[1]research packet 894-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-474-pc474-pkt-894-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-474 (live URL verified 2026-10-03) [other_primary]
- Locator
- PC-474 timeline and specification block
- Finding type
- vessel_history
- Finding
- NavSource documents this hull as a PC-461-class submarine chaser laid down 20 August 1941 by Defoe Shipbuilding Co., Bay City, Michigan; launched 15 September 1941; commissioned USS PC-474 on 11 February 1942 at Algiers Naval Station, New Orleans, Louisiana; assigned to the European theater in the Moroccan and Eastern Sea Frontiers; decommissioned 1 June 1944 and transferred to France as L'Indiscret (W 32) at Casablanca; later reclassified P-622; leased for mercantile trade in the 1950s; struck from the Navy Register 25 January 1960; fate unknown. Its specification block gives 450 tons displacement, 173 feet 8 inches length, 23 feet beam, 10 feet 10 inches draft, 20.2 knots, complement 65, and two General Motors 16-258S diesel engines driving two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1960
- Population
- Defoe construction trades (1941); U.S. Navy crew (1942-1944); French and later mercantile-service populations unknown
- Limitations
- Ship-specific identity, history, and specifications only; the page does not document asbestos, material content, exposure, abatement, or litigation. The source explicitly reports the later fate as unknown, which is carried without speculation.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-474-pc474-01
-
[3]National Archives, Special List No. 44, by Ship Numbers (PC-474 entry; live PDF verified 2026-10-03) [other_primary]
- Locator
- PDF p. 69, PC-474 row
- Finding type
- historical_record
- Finding
- The National Archives ship-number list records PC-474 with a commission date of 2/11/1942 and a decommission date of 6/1/1944, corroborating the NavSource dates used for this hull.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1944; list compiled for archival reference
- Population
- U.S. Navy administrative record
- Limitations
- The list is a date index rather than a ship history and does not document construction materials, asbestos, exposure, French service, or final disposition.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-474-pc474-02
-
[4]U.S. General Accounting Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979; live PDF verified through official GAO page 2026-10-03) [gao]
- Locator
- GAO HRD-80-2, pp. 10-12 and 21-22; Navy statements on shipboard applications
- Finding type
- asbestos_application
- Finding
- The GAO report reproduces Navy statements that asbestos was used in Navy shipboard thermal insulation for machinery, equipment, and piping, and in shipboard piping-system gaskets and packing, pipe-hanger liners, deck coverings, and equipment brakes. PC-474's 1941-42 construction and 1942-44 Navy service fall within the historical Navy shipbuilding and operating era addressed by this program context.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1979 context; report published 1979
- Population
- Navy shipbuilding, repair, and operating populations at program level
- Limitations
- Class/era and Navy-program context only. The report does not name PC-474, does not establish that any listed product was installed aboard this hull, and does not establish quantity, condition, individual exposure, causation, or present-day asbestos status.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-474-pc474-03
-
[5]NavSource PC-474 record, note on DANFS availability (live URL verified 2026-10-03) [other_primary]
- Locator
- NavSource note immediately following the commanding-officers section
- Finding type
- historical_record
- Finding
- The accessible PC-474 archival record states that there is no DANFS history currently available for PC-474. The record supplies the available construction, service, and disposition summary but no material or asbestos documentation.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 search status
- Limitations
- This is an access/coverage finding, not proof that no Navy archival record exists. NARA, Bureau of Ships, and Naval History holdings for PC-474 remain archival leads; the absence of a located DANFS entry is not a negative asbestos finding.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-474-pc474-04
-
[6]Official-source sweep and required authenticated CourtListener helper searches; see search_ledger [other_primary]
- Locator
- search_ledger rows sl-uss-pc-474-pc474-01 through -08
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, abatement contract, hazmat disclosure, material specification, or other primary asbestos record for USS PC-474 was located in the sources searched. The required CourtListener base searches were invoked through the authenticated helper for exact-name opinion, exact-name docket, hull-number opinion, and hull-number docket; the helper returned authenticated-request diagnostics but no usable result payload. Litigation status is therefore an access gap, not a negative result, and no litigation hit is classified or carried.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- A negative public-source search does not prove absence of asbestos aboard or absence of litigation. CourtListener was not supplemented with asbestos-qualified variants because no base-query overflow was available to establish the permitted condition; no anonymous or raw API request was made. Firecrawl official-source searches were blocked by a multi-hour keyless quota wait and fallback research is disclosed in the report.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-474-pc474-05