Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
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[1]research packet 916-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-624-pc624-pkt-916-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-624/YW-120/YWN-120 page [other_primary]
- Locator
- Full PC-624/YW-120/YWN-120 page; history paragraph and specifications block
- Finding type
- vessel_history
- Finding
- NavSource identifies this hull as PC-624, later YW-120 and YWN-120: laid down 19 March 1942 by Jeffersonville Boat and Machinery Co. at Jeffersonville, Indiana; launched 4 July 1942; commissioned USS PC-624 on 29 August 1942; sank German submarine U-375 on 30 July 1943 in the western Mediterranean northwest of Malta; grounded east of Palermo on 12 March 1944; reclassified YW-120 on 30 June 1944; decommissioned and transferred to the Free French on 22 November 1944; returned to the U.S. Navy on 21 March 1949 and reclassified YWN-120. The page gives PC-624-class specifications of 280 tons light/450 tons full load, 173 feet 8 inches length, 23-foot beam, 10-foot 10-inch draft, 20.2 knots, complement 65, and two General Motors 16-258S diesel engines with Farrel-Birmingham reduction gear and two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1949
- Population
- Jeffersonville construction workers 1942; U.S. Navy and Free French crews 1942-1949
- Limitations
- NavSource is a compiled naval-history archive and documents identity, history, and specifications, not asbestos content. It states that no DANFS history is available for PC-624. The NARA official ship-number list gives a 31 August 1942 start date for the deck-log span, creating a commissioning/date discrepancy that is carried separately; the exact post-1949 fate remains unknown.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-624-pc624-01
-
[3]National Archives, Special List #44, by Ship Numbers, PC-624 entry [other_primary]
- Locator
- PDF text, Special List #44, 'by Ship Numbers', PC-624 row
- Finding type
- historical_record
- Finding
- The National Archives' Special List #44 indexes PC-624 with a date span of 8/31/1942 through 6/29/1944, documenting an official Navy logbook coverage period for this hull.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-08-31 through 1944-06-29 (indexed span as printed)
- Population
- PC-624 ship's company and deck-log activity
- Limitations
- The list is an index, not the underlying deck-log pages; it does not establish the exact commissioning ceremony date, asbestos content, exposure, or the reason the log span ends on 29 June 1944. The 8/31/1942 start date conflicts by two days with NavSource's 29 August 1942 commissioning date.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-624-pc624-02
-
[4]GAO, Navy's Efforts to Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979) [gao]
- Locator
- GAO HRD-80-2 product page and report sections describing shipboard applications and 1971-1975 specification changes
- Finding type
- gov_survey
- Finding
- GAO's Navy-wide review identifies thermal insulation as the major shipboard asbestos use and discusses asbestos in components including clutches and electric cables; it also describes the Navy's transition toward asbestos-free specifications in the 1971-1975 period.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 report; Navy policy context 1971-1975
- Population
- Navy shipyard workers and shipboard personnel, program-level
- Limitations
- Program-level evidence, not a PC-624 record: GAO does not name this hull, identify a PC-461-class material, quantify asbestos aboard PC-624, or establish exposure or causation. The GAO URL was verified as existing but returned HTTP 403 to the direct fetch; report content was used through indexed/web fallback and remains era context only.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-624-pc624-03
-
[5]NavSource PC-624 machinery specifications, read with GAO HRD-80-2 Navy asbestos-era context [other_primary]
- Locator
- NavSource specifications block; GAO HRD-80-2 shipboard-application and policy context
- Finding type
- asbestos_application
- Finding
- Because NavSource identifies PC-624 as a diesel-powered PC-461-class submarine chaser with two diesel engines and no boilers or steam turbines, the steam-boiler lagging pathway does not apply. Given its 1942 wartime Navy construction, plausible era/design applications include diesel and exhaust insulation, gaskets and packing, electrical components, deck coverings, accommodation-space insulation, and friction materials.
- Verification
- inferred
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1949
- Population
- 1942 construction and fit-out workers; U.S. Navy and Free French crews
- Limitations
- This is class/era and design inference, not proof of asbestos aboard PC-624. No ship-specific material schedule, survey, construction specification, or abatement record was located. It does not establish presence, absence, quantity, location, individual exposure, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-624-pc624-04
-
[6]Batch-7999 source and litigation sweep ledger [other_primary]
- Locator
- Search-ledger rows sl-uss-pc-624-pc624-01 through sl-uss-pc-624-pc624-08
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos survey, material schedule, product identification, abatement record, hazardous-material disclosure, or verified asbestos-exposure record for PC-624/YW-120/YWN-120 was located in the sources searched. The four required authenticated CourtListener base requests were attempted, but the helper's fleet-wide pacing guard stopped each before results were returned; litigation status is therefore open, not negative.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 research sweep
- Limitations
- A failure to locate a public record does not prove absence of asbestos aboard or absence of litigation. CourtListener results were unavailable because of the shared fleet pacing guard, and no asbestos-qualified variants were run because no base-query result page was returned to establish an overflow. NARA construction, repair, transfer, and deck-log records remain open archival leads.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-624-pc624-05