USS PC-607

Evidence

10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).

1. [1]research packet 913-packet.md (1 sources cited) [other_primary]

   Finding type

   vessel_history

   Finding

   Identity packet verdict: VERIFIED (thin sourcing

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Limitations

   qualifier: VERIFIED (thin sourcing

   Evidence ID

   uss-pc-607-pc607-pkt-913-packet-md

2. [2]NavSource Online: Submarine Chaser Photo Archive, PC-607 (timeline, specifications, Brazilian Navy service) [other_primary]

   Locator

   NavSource page 12/010607, 'PC-461 Class Submarine Chaser' timeline and specifications blocks

   Finding type

   vessel_history

   Finding

   NavSource timeline for this hull: laid down 1 July 1942 by Luders Marine Construction Co., Stamford, CT; launched 11 February 1943; commissioned USS PC-607, 27 August 1943; decommissioned 19 October 1943, transferred to Brazil and named Guajará (CS 5); reclassified G-5 after World War II; decommissioned (Brazilian Navy) 18 September 1959; fate unknown. Specifications: 280 t. light / 450 t. full load; 173'8" x 23' x 10'10"; 20.2 kts; complement 65; armament one 3"/50 dual-purpose mount, one 40mm, two 20mm, two Mousetrap and four K-gun depth-charge projectors, two depth-charge tracks; propulsion two 1,440bhp General Motors 16-258S diesels (serial nos. 10878 and 10879), Farrel-Birmingham single reduction gear, two shafts.

   Verification

   verified

   Role

   context

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1942-1959

   Population

   Luders Marine construction trades 1942-43; USN crew Aug-Oct 1943; Brazilian Navy crew 1943-1959

   Limitations

   NavSource is a volunteer transcription archive, not a primary document - it documents the hull's timeline and specifications, not materials or asbestos content. Brazilian decommissioning date conflicts with Brazilian NGB (April 1959) - carried in gaps. No DANFS entry exists for PC-607 (stated on the page).

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-01

3. [3]Ships of the U.S. Navy, 1940-1945 - Submarine Chasers (HyperWar verbatim transcription of the Office of Naval History compilation), PC-607 row [other_primary]

   Locator

   PC-607 table row, 'Lend-Lease to Brazil' note

   Finding type

   vessel_history

   Finding

   The US Navy's own compilation lists PC-607 among the steel-hulled PC submarine chasers with commission-era window 1942-44 and disposition 'Lend-Lease to Brazil' - official confirmation of the transfer pathway consistent with NavSource's 19 October 1943 date.

   Verification

   verified

   Role

   context

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1942-1944

   Limitations

   Verbatim transcription of the ONH 'Ships of the U.S. Navy 1940-1945' compilation hosted on ibiblio/HyperWar; documents disposition only - no materials, asbestos, or crew content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-02

4. [4]Assis Filho, Jaime Florencio de (Capitão de Mar e Guerra), 'Segunda Guerra Mundial: principais missões da Marinha de Guerra brasileira no teatro do Atlântico Sul,' Revista Marítima Brasileira (Brazilian Navy journal), table sourced to História Naval Brasileira, Serviço de Documentação Geral da Marinha [other_primary]

   Locator

   Article Table 2 row 'G5 - Guajará'; narrative paragraphs on TJ/JT convoy employment and JT-46 composition

   Finding type

   vessel_history

   Finding

   Brazilian Navy official-journal record naming this hull's Brazilian identity: Table 2 ('Navios recebidos conforme o Lend and Lease Act') lists 'Caça-ferro Classe G | G5 - Guajará | 19 de outubro de 1943 | Miami'. The article's narrative records that the six G-class chasers delivered June-November 1943 were incorporated in the US and reached Brazil with TJ convoys after escorting on the Key West-Guantánamo and Guantánamo-Aruba-Trinidad legs, and that convoy JT-46 (8-19 October 1944, Recife-Trinidad) - the first convoy organized solely with Brazilian Navy ships - included Guajará among its four G-class escorts; Guajará returned to Recife on mixed convoy TJ-49 (27 October-8 November 1944).

   Verification

   verified

   Role

   context

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-1944

   Population

   Brazilian Navy crew 1943-1945 (convoy escort, South Atlantic)

   Limitations

   Official Brazilian Navy journal article (author a serving Capitão de Mar e Guerra); the transfer table is sourced to História Naval Brasileira (Serviço de Documentação Geral da Marinha). Documents Brazilian service and the transfer ceremony location/date - not materials or asbestos content. Page is behind Cloudflare; text extracted via Firecrawl renderer.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-03

5. [5]NARA Catalog, file unit 'PC-607, 8/30/43-10/17/43,' NAID 192392371, series Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities [other_primary]

   Locator

   NAID 192392371, 50-image scan set; microfilm Roll 5829

   Finding type

   historical_record

   Finding

   NARA holds and has digitized this hull's muster roll covering 30 August-17 October 1943 - effectively her entire USN commission (27 August-19 October 1943): 50 scanned images (Ancestry-NARA collaboration; microfilm roll 5829; National Archives at College Park). Muster rolls name the officers and enlisted men aboard by reporting period - direct documentation of the USN population aboard this hull during its commission.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943

   Population

   USN officers and enlisted aboard PC-607, Aug-Oct 1943 (complement ~65)

   Limitations

   Crew-roster documentation only - muster rolls carry names, ratings, and muster dates, not materials, work assignments, or asbestos content. Value is as a verified population record and research lead for crew-level follow-up.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-04

6. [6]Navios de Guerra Brasileiros (NGB), 'CS Guajará - G 5' (Brazilian Navy vessel reference; bibliography: Repositório de Nomes dos Navios da Esquadra Brasileira, 1959; Saldanha da Gama, A Marinha do Brasil na Segunda Guerra Mundial; NOMAR n.635, jun. 1995) [other_primary]

   Locator

   NGB Guajará G-5 page, 'Histórico' and footnote (2); commander table

   Finding type

   historical_record

   Finding

   Brazilian Navy vessel reference documenting this hull's Brazilian career and an official-source hull-number discrepancy: Guajará (G-5) was the third Brazilian Navy ship of the name, ex-USS PC-607, transferred at a Miami ceremony 19 October 1943 with Capitão-de-Corveta Dário Camillo Monteiro assuming command; baixa (stricken from active service) April 1959. NGB footnote (2) records that the official Repositório de Nomes dos Navios da Esquadra Brasileira (1959) and NOMAR n.635 (1995) instead list Guajará as ex-PC-1236 with keel laid 1 January 1942 and incorporation 22 October 1943 - a documented misattribution, since US records (NavSource, ONH compilation, uboat.net) uniformly show PC-1236 became Brazilian Grajaú (G-7) on 15 November 1943 while Guajará was ex-PC-607.

   Verification

   verified

   Role

   correction

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-1959

   Population

   Brazilian Navy crew 1943-1959

   Limitations

   NGB is a secondary reference site citing official Brazilian repositories - carried for the documented source conflict and Brazilian-side career details (first Brazilian CO, April 1959 baixa), not as a primary document. The PC-1236 attribution in the Brazilian official repository is a documented error; hull identity ex-PC-607 is consistent across US and Brazilian narrative records. Decommission conflict (April vs 18 September 1959) carried in gaps.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-05

7. [7]Era inference built on: NavSource PC-607 specification block (diesel plant, steel hull); NavSource PC class index (PC-461 class: steel-hulled twin-diesel 173' patrol craft, PC-542-PC-627 series); class construction documentation; GAO Navy asbestos-era program context [other_primary]

   Locator

   NavSource 12/010607 specifications block; NavSource PC class index (12/01idx.htm) class description

   Finding type

   asbestos_application

   Finding

   Era/class inference for a steel-hulled PC-461-class submarine chaser built at a small commercial yard in 1942-43 and powered by diesel engines (no steam plant): period-standard asbestos applications for the type were concentrated in diesel engine and exhaust thermal insulation, compressed-asbestos gaskets at engine and piping flanges, valve and machinery packing, electrical insulation, and compartment insulation/fireproofing - consistent with WWII Navy construction practice and the GAO-documented Navy-wide asbestos use of the era.

   Verification

   inferred

   Role

   supporting

   Documentation level

   class_or_era

   Accessed

   2026-10-03

   Study period

   1942-1959

   Population

   Luders Marine construction trades 1942-43; engineering ratings (motor machinist's mates) aboard USN 1943 and Brazilian Navy 1943-1959

   Limitations

   Class/era inference only - no source names this hull's materials, and the PC-461 diesel plant means no boiler/steam-line lagging pathway. Asbestos presence aboard this hull is a reasonable era-consistent inference, not ship-proven; does not establish quantity, location, present-day presence, or individual exposure.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-06

8. [8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]

   Locator

   GAO product page HRD-80-2

   Finding type

   regulatory

   Finding

   GAO program-level documentation that the US Navy used asbestos insulation aboard ships and in shipyards through the period covering this hull's 1942-43 construction - era context for the class inference row.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-10-03

   Study period

   1940s-1979

   Population

   Navy and shipyard workers, asbestos era (program level)

   Limitations

   Program-level context only; gao.gov returned HTTP 403 to automated fetch this session, so the product-page description was relied on (same standing access defect as prior batches). Does not name this hull or class; GAO fieldwork covered naval shipyards, not small commercial builders such as Luders.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-07

9. [9]Batch-7982 search ledger (this record): NHHC/DANFS index; NavSource; HyperWar ONH compilation; Naval Vessel Register; NARA Catalog; Revista Marítima Brasileira; marinha.mil.br DPHDM; NGB naval.com.br; CourtListener (opinion and RECAP indexes); shipyards.json; secondary web sweep [other_primary]

   Locator

   search_ledger rows sl-uss-pc-607-pc607-01 through sl-uss-pc-607-pc607-15

   Finding type

   historical_record

   Finding

   No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming PC-607 or Guajará was found in the public sources searched (see search_ledger). CourtListener base queries completed: 'USS PC-607' returned zero hits in both opinion and docket indexes; bare 'PC-607' queries were repeatedly paced by the fleet-wide rate limiter and are logged blocked, not as a negative result. Contributing structural factor: the builder's records were largely destroyed in a 1962 yard fire, and Brazilian-era disposition records are sparse ('fate unknown').

   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 at the height of the asbestos era, and its Brazilian scrapping/disposal left no hazmat trail in US-accessible sources. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-607-pc607-08

10. [10]New York Times, 'A Shipyard Legend Named Luders' (9 July 1995) - Luders Marine Construction Co., Stamford Harbor; yard closed 1968; records lost in a 1962 shipyard fire [reputable_press]

    Locator

    NYT 1995-07-09 regional article

    Finding type

    historical_record

    Finding

    Yard-level context for the builder: Luders Marine Construction Co. operated ~60 years at Stamford Harbor (largest Connecticut shipbuilder per the article) and closed in 1968; the yard's records were lost in a 1962 fire - explaining the absence of hull-level construction/materials documentation for Luders-built vessels including PC-607.

    Verification

    verified

    Role

    context

    Documentation level

    class_or_era

    Accessed

    2026-10-03

    Study period

    1962-1995

    Population

    Luders Marine workforce (context)

    Limitations

    Press report on the yard, not the hull - documents why builder-side materials records are unavailable. Contains no asbestos information; does not establish that yard records were the only possible materials documentation.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-607-pc607-09