Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 905-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-547-pc547-pkt-905-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-547 hull page (live .net domain verified 2026-10-03) [other_primary]
- Locator
- NavSource PC-547 page - chronology block and specifications block
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: PC-461-class submarine chaser; laid down 16 April 1942 by Defoe Shipbuilding Corp., Bay City, MI; launched 22 May 1942; commissioned USS PC-547 on 24 July 1942; 'served the Navies of the United States (2 months) and Brazil'; transferred to Brazil 24 September 1942 and named Gurupi (CS 2); reclassified G-2 after WWII; reclassified as Training Ship J-17 in the 1950s; decommissioned 18 September 1959; scrapped 4 November 1959. Specifications: 280 t light / 450 t full; 173'8" x 23' x 10'10"; 20.2 kts; complement 65; two 3"/50 dual-purpose mounts, three 20mm guns, two Mousetrap depth-charge projectors, four K-guns, two depth-charge tracks; two 1,440 bhp General Motors 16-258S diesel engines (serial nos. 6908 and 6909), Farrel-Birmingham single reduction gear, two shafts. Page notes explicitly that no DANFS history exists for PC-547, and its image captions credit National Archives photographs.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Defoe Shipbuilding construction trades (Apr-Jul 1942); USN complement ~65 (Jul-Sep 1942); Brazilian Navy crews and maintainers (1942-1959)
- Limitations
- NavSource is a private volunteer archive (authoritative for dates/specs and NARA-captioned imagery, not a government source). It documents service history and specifications, not materials or asbestos content. Its hull-designation sequence (CS 2, then G-2, then J-17) differs from NGB's (G-2 at transfer, CS-2 in 1955, J-17 late 1950s) - carried in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-01
-
[3]uboat.net Allied Warships of WWII, USS PC-547 (PC-547) warship entry [other_primary]
- Locator
- uboat.net PC-547 entry - data table and Commands section
- Finding type
- vessel_history
- Finding
- uboat.net record for this hull: PC-461-class patrol craft; built by Defoe Shipbuilding Co., Bay City, Michigan; ordered 1 April 1941; laid down 16 April 1942; launched 22 May 1942; commissioned 24 July 1942; end of US service 24 September 1942; 'Transferred to Brazil on 24 September 1942 being renamed Gurupi.' Command listing: Sidney Richmond Jackson, USNR, 24 July - 24 September 1942.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1942
- Population
- USN crew (Jul-Sep 1942)
- Limitations
- Specialist reference database (Guðmundur Helgason), not a government source; corroborates NavSource dates and is the sole located source for the 1 April 1941 order date and the US commanding officer. Documents history only - no materials or asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-02
-
[4]Navios de Guerra Brasileiros (NGB), CS Gurupi - G 2/CS 2/J 17 page (bibliography cites Brazilian Navy official publications: Mendonca & Vasconcelos Repositorio de Nomes dos Navios da Esquadra Brasileira (SDGM 1959); Saldanha da Gama, A Marinha do Brasil na Segunda Guerra Mundial (1982); NOMAR; Historia Naval Brasileira Tomo II (SDGM 1985)) [other_primary]
- Locator
- NGB G088 page - Datas, Caracteristicas, Historico (1942, 1943, 1944, 1945, 1951, 1955, 1959), convoy tally table, Bibliografia
- Finding type
- vessel_history
- Finding
- NGB record for this hull under its Brazilian identity: CS Gurupi (G-2/CS-2/J-17), ex-USS PC-547, first Brazilian warship of that name, honoring the Gurupi River on the Para-Maranhao border; built by Defoe Boat and Motor Works, Bay City; launched 22 May 1942; incorporated USN 24 July 1942; USN struck 24 September 1942; transferred and incorporated into the Marinha do Brasil 24 September 1942 in a ceremony at Base Naval de Natal-RN, Capitao-Tenente Mauro Ballousier assuming command - together with CS Guapore (ex-PC-544) among the first US warships transferred to Brazil under wartime mutual-cooperation agreements; Gurupi's officers passed through the first class of the Fleet Sound School at Key West. On 5 October 1942 subordinated to the Forca Naval do Nordeste (created by Aviso no. 1661) under US Fourth Fleet command, later part of Task Force 46. Service included escort of the cable ship Cambria during submarine-cable maintenance, mixed US-Brazilian escort of Recife-Trinidad JT and Trinidad-Recife TJ convoys, and Maranhao-coast anti-submarine patrols; NGB's tally credits Gurupi with 64 convoy-escort commissions including JT-54 (Dec 1944-Jan 1945), the second all-Brazilian JT escort; departed Trinidad 13 March 1945 on convoy suspension, arrived Natal 20 March 1945. 1951 ASW exercises with Naval School midshipmen; hull designation changed to CS-2 in the 1955 standardization; shown with J-17 designation in late-1950s photos; decommissioned to disposal in 1959. Characteristics as incorporated: 280 t standard / 450 t full; two GM 16-258S diesels; 20 knots; 3,000 nm at 12 knots; complement 65 (5 officers + 60 enlisted).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1959
- Population
- Brazilian Navy crews, escort personnel, and maintainers (1942-1959)
- Limitations
- NGB is a private Brazilian naval-history site whose named bibliography is official Marinha do Brasil publications - authoritative for service narrative but secondary in status. Contains no asbestos or materials documentation. Hull-designation sequencing (G-2, CS-2, J-17) differs in order from NavSource - carried in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-03
-
[5]Revista Maritima Brasileira (official Brazilian Navy journal), 'Segunda Guerra Mundial: principais missoes da Marinha de Guerra brasileira no teatro do Atlantico Sul' - transfer table and narrative [other_primary]
- Locator
- Revista Maritima Brasileira article 6784, transfer table (Tabela 2) and Lend-Lease narrative
- Finding type
- vessel_history
- Finding
- Official Brazilian Navy journal article tabulating US-to-Brazil ship transfers lists 'Classe G | G2 - Gurupi' incorporated 24 September 1942 at Natal; narrative states the eight steel-hulled 'caca-ferro' class-G submarine chasers were among the wartime US transfers under the Lend-Lease framework, with the Comissao de Recebimento de Navios established in Miami on 7 July 1942 to train Brazilian crews, and the first ships - CS G-1 Guapore and G-2 Gurupi - incorporated in ceremony at the port of Natal on 24 September 1942. Confirms this hull's Brazilian identity, class assignment, transfer date, and transfer location from an official .mil.br source.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- Brazilian Navy crews (1942-1945 context)
- Limitations
- portaldeperiodicos.marinha.mil.br returns HTTP 403 to automated fetches - content verified via the indexed search excerpt of the article text, which carries the G2-Gurupi table row and the transfer narrative verbatim; the full PDF could not be re-verified byte-for-byte this session. No asbestos or materials content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-04
-
[6]HyperWar/ibiblio transcription, 'Ships of the U.S. Navy, 1940-1945 - Submarine Chasers' (US Navy compilation): PC-461 class block and hull roster [other_primary]
- Locator
- ships-sc.html - PC-461 Class specifications block and hull roster row 'PC-547-549'
- Finding type
- vessel_history
- Finding
- US Navy roster compilation lists PC-547 within the grouped entry 'PC-547-549' in commission 1942-44, and gives PC-461-class specifications: 284 tons; 173'8" x 23' x 10'10"; 21 knots; 1x 3"/50, 1x 40mm, 5x 20mm, 2 depth-charge throwers (mousetraps), 2 K-guns, 2 depth-charge racks; complement 65; diesel engines, 2 screws, 2,280 shaft hp. Adjacent hulls in the roster carry 'Lend-Lease to France' / 'Lend-Lease to Brazil' annotations (e.g., PC-544 and PC-546 to Brazil); the PC-547-549 grouped row carries none.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1940-1945
- Population
- USN crews of PC-461-class craft (era context)
- Limitations
- Compilation documents class specifications and in-service dates, not materials or asbestos. The grouped PC-547-549 row omits the Lend-Lease annotation present on adjacent rows - the transfer is nonetheless documented for this hull by NavSource, uboat.net, NGB, and the official Brazilian Navy journal. Class-block armament/hp figures differ slightly from this hull's NavSource specification block - hull-level figures carried.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-05
-
[7]Fleischer WE, Viles FJ Jr, et al. 'A health survey of pipe covering operations in constructing naval vessels.' J Ind Hyg Toxicol. 1946 Jan;28:9-16. PMID 21016030 [other_primary]
- Locator
- PubMed record PMID 21016030 (bibliographic data verified via Europe PMC API, 2026-10-03)
- Finding type
- asbestos_application
- Finding
- Contemporaneous industrial-hygiene literature: a cross-sectional epidemiological survey of pipe-covering operations in naval-vessel construction, published January 1946 in the Journal of Industrial Hygiene and Toxicology. Its existence documents that pipe-covering insulation work - the era's principal asbestos-handling trade aboard new naval construction - was a routine, separately surveyed operation during WWII shipbuilding, the period when this hull was built (Apr-Jul 1942).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1946 publication; WWII construction era surveyed
- Population
- WWII naval-vessel construction pipe coverers (industry-level)
- Limitations
- Era/industry-level documentation only: the study does not name PC-547, the PC-461 class, or Defoe Shipbuilding, and does not prove asbestos was installed aboard this hull. The study's conclusions are themselves contested by later literature (e.g., Kelly, New Solut 2026;36(2):138-150, PMID 42307414, which critiques it as 'deeply flawed, never retracted') - cited here only for the existence of the surveyed operations, not for any dose or safety finding.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-06
-
[8]National Archives and Records Administration - prospective holdings for this hull: RG 24 (Records of the Bureau of Naval Personnel) deck logs for the Jul-Sep 1942 USN commission; RG 19 (Records of the Bureau of Ships) construction plans/specifications for the Defoe contract [other_primary]
- Locator
- catalog.archives.gov (JS-rendered catalog, item-level query not executable by automated fetch); NavSource PC-547 photo captions crediting National Archives
- Finding type
- historical_record
- Finding
- Archival lead only: PC-547's two-month USN commission (Jul-Sep 1942) should have generated deck logs within RG 24 holdings, and Bureau of Ships contract documentation and hull plans for the Defoe build within RG 19; NavSource's image captions already credit National Archives photographs of this hull (PC-547 moored outboard of PC-544), confirming NARA holds imagery of the vessel. Item-level retrieval not performed - the NARA catalog is JavaScript-rendered and could not be queried to item level by automated access this session.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Limitations
- Lead, not a located record: no NARA item was retrieved or verified to item level; existence of the deck log and plan holdings is inferred from standard USN record practice and the NARA-credited photographs on NavSource. Establishes nothing about materials or asbestos aboard.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-07
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[9]Batch-7922 search ledger (this record): NHHC DANFS lookup (404); Naval Vessel Register lookup (no record); NavSource explicit no-DANFS note; web-wide search for ship-specific asbestos records; CourtListener authenticated queries sl-13 through sl-18 [other_primary]
- Locator
- search_ledger rows sl-uss-pc-547-pc547-01 through sl-uss-pc-547-pc547-19
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record (hull scrapped in Brazil 1959 - no preserved artifact exists), or docketed case naming PC-547 or Gurupi was found in the public sources searched. No DANFS entry exists (NHHC page returns 404; NavSource states no DANFS history is available for this hull). The Naval Vessel Register carries no record - NVR excludes vessels disposed of before 1987 and this hull was disposed in 1959. CourtListener authenticated searches executed this session returned no qualifying litigation: '"USS PC-547"' opinion (12 hits, all name collisions), '"USS PC-547"' docket (1,080 hits, token collisions, zero asbestos mentions), 'PC-547' opinion (3,475 hits, token collisions), 'PC-547' docket (24,796 hits, token collisions), and the authorized asbestos-qualified variants 'PC-547 asbestos' opinion (132 hits, collisions only) and 'PC-547 asbestos' docket (1,450 hits - asbestos dockets matching 'PC'/'547' tokens, no literal PC-547); the remaining authorized variant '"USS PC-547 asbestos"' docket stayed pacing-blocked at commit time (ledger row sl-19).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - the hull was built in WWII-era practice and scrapped in 1959, leaving no hull to survey. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility. Litigation status reflects the search ledger's recorded results at last_researched date.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-547-pc547-08