Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
-
[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-497-pc497-pkt-898-packet-md
-
[2]Naval History and Heritage Command, Dictionary of American Naval Fighting Ships, SC-401–SC-500, SC-497 entry and SC-497 Class Characteristics [nhhc_danfs]
- Locator
- SC-497 entry immediately following the SC-497 Class Characteristics section; class characteristics block
- Finding type
- vessel_history
- Finding
- NHHC identifies SC-497 as built at Westergard Boat Works, Inc., Rockport, Texas; keel laid 7 March 1941; launched 4 July 1941; commissioned 15 April 1942; and transferred to France 18 March 1944. The same page gives SC-497 class characteristics of 100 feet overall, 17 feet beam, 6 feet 6 inches maximum draft, 148 tons full-load displacement, 3 officers and 25 enlisted accommodations, diesel propulsion on two screws, and typical class armament.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1944
- Population
- U.S. Navy crew and construction personnel; class-level specifications
- Limitations
- The NHHC page documents ship history and class characteristics, not asbestos content, ACM locations, abatement, individual exposure, or legal eligibility. Class characteristics are not treated as a ship-specific material finding.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-01
-
[3]National Archives, Special List #44, by Ship Numbers [other_primary]
- Locator
- PDF p. 69, line for PC-497
- Finding type
- historical_record
- Finding
- The National Archives Special List #44 lists PC-497 with a begin date of 4/15/1942 and an end date of 6/30/1942 in the ship-number logbook series.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- Navy logbook series; PC-497
- Limitations
- This Navy logbook coverage index confirms the date range in the identified series; it does not provide a complete service history, disposition record, or asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-02
-
[4]NavSource Online, Submarine Chaser Photo Archive, SC-497 (ex-PC-497) [other_primary]
- Locator
- SC-497 page, history bullets and specifications block
- Finding type
- vessel_history
- Finding
- The live SC-497 page identifies the vessel as ex-PC-497; records reclassification as SC-497 in April 1943; transfer to France on 18 March 1944 and permanent transfer on 15 August 1944 as CH-96; later reclassification as CH-724 in 1952 and P-724; withdrawal from service on 23 October 1980; and fate unknown. It also lists 148-ton displacement, 110 feet 10 inches length, 17 feet beam, 6 feet 6 inches draft, 15.6-knot speed, complement 28, and two 880-hp General Motors 8-268A diesel engines on two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1980
- Population
- U.S. Navy and French naval personnel; postwar French service
- Limitations
- NavSource is used for the vessel-specific sequence and specifications where NHHC’s page does not provide the French-service details. The page does not document asbestos, ACM locations, abatement, individual exposure, or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-03
-
[5]CourtListener authenticated API v4 search sweep: exact-name and hull-number opinion and docket searches [court_record]
- Locator
- Search ledger sl-uss-pc-497-pc497-01 through -04
- Finding type
- litigation_documented
- Finding
- No qualifying asbestos-litigation hit was located for USS PC-497 or PC-497 in the four required base searches: exact-name opinion, exact-name docket, hull-number opinion, and hull-number docket. No hit was classified as qualifying asbestos litigation, other litigation, or a name collision. No asbestos-qualified variant was run because no base query overflowed its 20-result page.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 search; litigation dates not applicable
- Population
- CourtListener opinions and RECAP dockets
- Limitations
- This is a search result, not proof that no litigation exists. The sweep is limited to the authenticated CourtListener v4 search index and the four required base queries; it does not establish asbestos absence aboard the vessel or resolve records outside the index.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-04
-
[6]NHHC SC-497 Class Characteristics and SC-497 entry; official page reviewed for asbestos-relevant ship-specific material documentation [nhhc_danfs]
- Locator
- SC-497 entry and SC-497 Class Characteristics block
- Finding type
- asbestos_application
- Finding
- The reviewed NHHC entry and class-characteristics section contain no statement that asbestos or an asbestos-containing product was installed aboard PC-497/SC-497, and no ship-specific survey, abatement, or material inventory was located there.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1944 source coverage
- Population
- PC-497/SC-497 historical record
- Limitations
- A negative finding in this historical source is not a finding that asbestos was absent. It only records that the reviewed official history does not document asbestos for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-05
-
[7]National Archives Special List #44; official logbook-series index reviewed for ship-specific asbestos or exposure documentation [other_primary]
- Locator
- PDF p. 69, PC-497 index line
- Finding type
- asbestos_application
- Finding
- The reviewed National Archives index entry for PC-497 is a date-range listing only and contains no asbestos, material, survey, abatement, or exposure information for this hull.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- Navy logbook series; PC-497
- Limitations
- The index does not represent the contents of all underlying logbooks and cannot establish that those records lack asbestos-related information. No underlying PC-497 logbook was retrieved in this batch.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-06
-
[8]NHHC SC-497 Class Characteristics [other_primary]
- Locator
- SC-497 Class Characteristics block
- Finding type
- asbestos_application
- Finding
- The official class description establishes that SC-497 was a small World War II wooden-hulled submarine-chaser class with diesel propulsion, two screws, and class-level accommodation and armament characteristics. This is historical context for the vessel’s design and era only.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- World War II construction and service era
- Population
- SC-497 class
- Limitations
- No asbestos application is inferred from class, construction era, propulsion, or machinery. This row cannot support a claim that asbestos was installed aboard PC-497/SC-497.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-497-pc497-07