Evidence
5 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-5).
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[1]research packet 898-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-496-pc496-pkt-898-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-496 [other_primary]
- Locator
- PC-496 page, timeline and specifications sections
- Finding type
- vessel_history
- Finding
- The hull-specific record states that PC-496 was laid down 24 April 1941 by Leathem D. Smith Coal and Shipbuilding Co. at Sturgeon Bay, Wisconsin; launched 22 November 1941; commissioned 26 February 1942 at New Orleans, Louisiana; assigned during World War II to the Caribbean Sea Frontier and European theater; and torpedoed and sunk by an Italian submarine off Bizerte, Tunisia, on 4 June 1943. It lists a 65-person complement and diesel propulsion.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1943
- Population
- PC-496 crew and construction personnel
- Limitations
- NavSource is an official-history-oriented archival lead rather than a Navy agency record; it documents identity and service history, not asbestos content, individual exposure, product quantities, or legal eligibility. Its propulsion line is retained as reported and does not establish any insulation material.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-496-pc496-01
-
[3]National Archives, Special List #44, by Ship Numbers [other_primary]
- Locator
- PDF p. 69, entry PC-496
- Finding type
- historical_record
- Finding
- The National Archives ship-number list includes PC-496 with Navy logbook coverage from 26 February 1942 through 31 March 1943, corroborating the commissioned-service identity and providing an archival lead for the vessel's wartime operational record.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-02-26 to 1943-03-31
- Population
- PC-496 commissioned crew and ship operations
- Limitations
- The list identifies the existence and date span of logbook holdings; it is not the logbook text and does not report asbestos, onboard materials, exposure, or the circumstances of the 4 June 1943 loss.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-496-pc496-02
-
[4]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (1979) [gao]
- Locator
- GAO product page highlights
- Finding type
- gov_survey
- Finding
- GAO reviewed Navy ship asbestos use and removal practices at Long Beach and Norfolk Naval Shipyards and described Navy policy for removing or replacing damaged asbestos insulation and insulation removed during repairs. This is Navy-wide program context relevant to the period, not a finding about PC-496.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1975-1979 policy and review period
- Population
- Navy shipyard workers and Navy asbestos program
- Limitations
- The report concerns program activity at named shipyards and does not name PC-496, its builder, its class, or any material aboard this hull. It cannot establish asbestos presence, quantity, location, or exposure aboard PC-496.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-496-pc496-03
-
[5]Batch-7871 source review: NavSource PC-496 record, National Archives Special List #44, NHHC ship-history index, Naval Vessel Register coverage statement, and GAO HRD-80-2 [other_primary]
- Locator
- search_ledger rows sl-uss-pc-496-pc496-01 through -09
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, abatement contract, hazmat disclosure, asbestos product identification, or qualifying asbestos-litigation record was located in the public sources reviewed. CourtListener could not be completed after its authenticated helper reported that the fleet-wide pacing budget was momentarily spent; this is an open litigation-search gap, not a negative litigation result.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 review
- Limitations
- A failure to locate a public record does not prove that asbestos was absent from the hull and does not resolve exposure or legal eligibility. The CourtListener search remains incomplete and must not be represented as a completed negative search.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-496-pc496-04