Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
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[1]research packet 918-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: UNVERIFIABLE
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-642-pc642-pkt-918-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, 'USCGC Air Egret (WAVR 420), ex-USS SC-642, ex-USS PC-642' (live page verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/150642.htm: title/header, SC-497 Class Submarine Chaser timeline, specifications, and DANFS notice
- Finding type
- vessel_history
- Finding
- The hull was laid down 28 October 1941 by Peterson Boat Works, Sturgeon Bay, Wisconsin; launched 30 May 1942; delivered and commissioned USS PC-642 on 4 August 1942; reclassified SC-642 in April 1943; transferred to the Coast Guard on 24 January 1946 and commissioned USCGC Air Egret (WAVR 420); struck from the Naval Register on 7 February 1946; and sold 11 March 1948. NavSource identifies it as an SC-497-class submarine chaser and gives a 110-foot-10-inch wooden diesel craft's specifications: 98 tons, 17-foot beam, 6-foot-6-inch full-load draft, 21 knots, complement 28, two 1,540-bhp GM 16-184A diesel engines, and two shafts. The page also states that no DANFS history is available for SC-642.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1948
- Population
- Peterson Boat Works construction trades (1941-42); Navy crew (1942-46); Coast Guard crew or caretakers (from 1946)
- Limitations
- Ship-specific identity and timeline evidence, not asbestos evidence. NavSource is a specialist volunteer archive rather than an official registry; the live page is used for the requested PC/SC identity crosswalk and milestone history. It does not establish actual commissioning or decommissioning from NARA log dates, material content, exposure, quantity, causation, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-642-pc642-01
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[3]National Archives, Special List 44, 'List of Logbooks of the U.S. Navy at the National Archives, by Ship Number' (SC-642 row; live PDF verified 2026-10-03) [other_primary]
- Locator
- Special List 44 PDF, p. 104 (printed page), row 'SC-642 8/4/1942 7/31/1945'
- Finding type
- historical_record
- Finding
- NARA Special List 44 lists SC-642 with logbook coverage beginning 4 August 1942 and ending 31 July 1945.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-08-04 to 1945-07-31
- Population
- SC-642 officers and crew reflected in deck-log period
- Limitations
- These are logbook-coverage dates, not commissioning, decommissioning, transfer, or disposal dates. The list establishes that NARA identifies the hull as SC-642 and holds/identified logs for that interval; it does not establish asbestos content, operations, personnel exposure, or a disposition date.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-642-pc642-02
-
[4]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (1979) [gao]
- Locator
- GAO product page HRD-80-2 (automated access blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO's Navy-wide asbestos program review provides era context for a vessel constructed in 1941-42 and operated in the 1940s; it is not a hull-specific survey or material list for SC-642.
- Verification
- partial
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 report; contextualized against 1941-48 vessel era
- Population
- Navy shipyard workers and Navy asbestos-protection program, not an SC-642-specific population
- Limitations
- The live GAO product page returned HTTP 403 to automated retrieval on 2026-10-03, so no full-text factual assertion is made from it here. This row is program-level context only and does not establish any asbestos-containing material aboard SC-642, exposure, quantity, condition, causation, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-642-pc642-03
-
[5]Batch 8017 documented source and litigation search ledger [other_primary]
- Locator
- search_ledger rows sl-uss-pc-642-pc642-01 through sl-uss-pc-642-pc642-06
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, abatement record, hazmat disclosure, material specification, or qualifying asbestos litigation record was located in the completed non-CourtListener sources. CourtListener is an unresolved access gap: its authenticated helper stopped before returning a usable payload because the fleet-wide paced budget was momentarily spent.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- research completed 2026-10-03
- Limitations
- This is a negative finding only as to the completed non-CourtListener research, not proof that asbestos was absent. CourtListener was blocked rather than searched to completion, so no litigation negative is asserted. It establishes nothing about exposure, causation, product identity, quantity, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-642-pc642-04
-
[6]NavSource Online, 110-foot Submarine Chaser (SC) Photo Index (live page verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/15idx.htm, 'SC-497 Class - Continued' entry: 'SC-642 ... ex-PC-642'
- Finding type
- historical_record
- Finding
- The SC photo index lists SC-642 as 'ex-PC-642' within the SC-497-class continuation block. Together with the SC-642 hull page, this corrects the identity: PC-642 and SC-642 are one wooden SC-497-class submarine chaser, not a PC-461-class patrol craft.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 designation transition
- Limitations
- This is a hull-designation and class correction only. The index does not document asbestos, material content, operations, transfer terms, exposure, causation, quantity, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-642-pc642-05