Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 936-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-765-pc765-pkt-936-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-765 ex-PC-765 - designation timeline, specifications, Brazilian transfer (live-verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/150765.htm header block and specifications block
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull, indexed canonically as 'SC-765 ex-PC-765', 'SC-497 Class Submarine Chaser': laid down 8 April 1942 by W. A. Robinson, Inc., Ipswich, MA; launched 12 November 1942; commissioned USS PC-765, 3 December 1942; transferred to Brazil 16 February 1943 and named Jaguarão (CS 55); reclassified SC-765 by the U.S. Navy in April 1943; reclassified J-5 after World War II; decommissioned 25 June 1950; 'Fate unknown.' Specifications: displacement 148 t.; length 110'10"; beam 17'; draft 6'6"; speed 15.6 kts.; complement 28; armament one 3"/23 mount, two 20mm mounts, two Mousetrap depth-charge projectors, two K-gun depth-charge projectors, two depth-charge tracks; propulsion two 880bhp General Motors 8-268A diesels, Snow and Knobstedt single reduction gear, two shafts. Page states 'There is no DANFS history available for SC-765.' Photo on page credited to SDGM (Serviço de Documentação Geral da Marinha, Brazilian Navy documentation service) via sixtant.com.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1950
- Population
- US construction trades at W. A. Robinson (1942); US crew (1942-12-03 to 1943-02-16); Brazilian crew (1943-1950)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track official sources but the 25 June 1950 decommission date conflicts with the Brazilian NGB record's 28 June 1950 (see gaps). Contains no asbestos content. 'Fate unknown' means final disposition after Brazilian decommissioning is undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-01
-
[3]NARA Special List #44 - List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (by ship number); RG 24 Entry 118 logbook coverage [other_primary]
- Locator
- Special List #44 (sl-44-ship-number.pdf), SC block, p. containing SC-764/SC-766 sequence; NARA logbooks overview at archives.gov/research/military/logbooks/navy
- Finding type
- historical_record
- Finding
- NARA holds deck logs for this hull - cataloged as SC-765 - covering 12/3/1942 to 2/16/1943 (Special List #44, ship-number ordering, SC block). The coverage span matches her entire U.S. Navy commissioned career exactly: commissioning 3 December 1942 through transfer to Brazil 16 February 1943. These are the authoritative primary record for her 75-day U.S. service (shakedown/transit activity, muster rolls of the day, machinery notes), held at NARA College Park under RG 24 Entry 118 (NAID 581208).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (log coverage)
- Population
- US crew of PC-765, December 1942 - February 1943 (mustered in logbook entries)
- Limitations
- Archival lead only: the list establishes that logs exist and their date coverage; the logs themselves are not digitized (per the NARA logbooks page, post-1940 logs are at the National Archives at College Park) and were not reviewed - contents (operations detail, any maintenance/material notations) unverified. Log presence is not an asbestos record.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-02
-
[4]NGB - Navios de Guerra Brasileiros, 'CS/NF Jaguarão - CS 55/J 5, Classe SC 497/J' (naval.com.br; cites SDGM Repositório de Nomes dos Navios da Esquadra Brasileira 3rd ed. 1959, Saldanha da Gama 'A Marinha do Brasil na Segunda Guerra Mundial' 1982, Dantas 'A História da Sinalização Náutica Brasileira' 2000, História Naval Brasileira SDGM 1985) - live-verified 2026-10-03 [other_primary]
- Locator
- NGB J013 page - Datas, Características, Histórico (1943/1944/1947/1948/1949/1950 sections), convoy and commander tables, bibliography
- Finding type
- vessel_history
- Finding
- Brazilian-service record for this hull: built by W. A. Robinson Inc., Ipswich MA; launched 12 November 1942; incorporated into the US Navy 3 December 1942; struck from USN and incorporated into the Marinha do Brasil 16 February 1943 in a ceremony at Miami, Florida, Capitão-Tenente Oswaldo de Macedo Cortes assuming command (fifth Brazilian ship named Jaguarão). Wartime South Atlantic convoy escort: March-April 1943 mixed US-Brazilian escort legs Key West-Guantanamo Bay (21-26 Mar), Guantanamo-San Juan (1-5 Apr), San Juan-Trinidad (7-10 Apr), convoy TB 11 Trinidad-Belém (13-23 Apr); 5 June 1943 recovered downed American aviators at Lençóis Grandes-MA; July 1943 BT-18 escort then rescue of survivors after U-185 torpedoed N/T William Boyce Thompson and N/M James Robertson 7 July off Cabo São Roque; 28 July 1943 commendation letter from USN Fourth Fleet commander Rear Adm. Jonas H. Ingram to Rear Adm. Soares Dutra praising Jaguarão's and Jaguaribe's rapid response; 24-25 Aug 1943 Cuiabá/Siqueira Campos collision escort detail and Itapagé escort; 5 May 1944 01:10 attacked in error by USN blimp K-132 (bomb fell ~20 m off). Totals: 49 regular convoy escort commissions (TJ 1, Salvador/Recife 1, Rio/Recife 13, Recife/Rio 15, other 19); under first CO 40,844 miles, 188.5 days at sea, 201 merchant ships convoyed. Reclassified J-5 postwar; ceded to the Diretoria de Hidrografia e Navegação by Aviso n.º 0895 of 16 April 1947 as Navio Faroleiro (lighthouse tender); served Bahia stations (Coroa Vermelha, Ponta da Baleia, Alcobaça, Corumbau, Ilhéus) and RJ/SP ports; inaugurated Coroa Vermelha tower 15 Aug 1948 and Porto Seguro tower 6 Sep 1948; decommissioned 28 June 1950 by Ordem-do-Dia n.º 12 do Estado Maior da Armada. NGB characteristics at Brazilian commissioning: 98 t standard / 130 t loaded; 33.52 m length; two GM 184A 'Pancake' 16-cylinder diesels 1,200 bhp total, two shafts; 21 kts; crew 27 (3 officers + 24 enlisted); SF/SL radar, hull sonar; class acquisition cost US$500,000 (1942-43).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1950
- Population
- Brazilian receiving crew and wartime complement (named receiving party incl. CT Oswaldo de Macedo Cortes, 1º Ten Adolfo Barroso de Vasconcellos, 2º Ten Álvaro de Rezende Rocha); lighthouse-service crews 1947-50
- Limitations
- Brazilian naval-history compilation citing official repository works (SDGM) - a secondary source, not an official document, though its cited bibliography is authoritative. Several figures conflict with NavSource (decommission date, displacement, engines, speed, complement - see gaps). No asbestos or material content. Portuguese-language page; quotations translated.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-03
-
[5]uboat.net Allied Warships of WWII, USS SC-765 (SC-765), Submarine chaser of the SC-497 class (live-verified 2026-10-03) [other_primary]
- Locator
- uboat.net ship/8982 data table; Brazilian companion record ship/10101
- Finding type
- vessel_history
- Finding
- uboat.net ship record (indexed as SC-765, SC-497 class): built by W.A. Robinson Inc. (Ipswich, Massachusetts); ordered 16 February 1942; laid down 8 April 1942; launched 12 November 1942; commissioned 3 December 1942; end of US service 16 February 1943 - 'Transferred to Brazil on 16 February 1943 being renamed Jaguarão.' The Brazilian sister record (ship/10101) lists CS 55 commissioned 16 Feb 1943, decommissioned 28 June 1950.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1950
- Limitations
- uboat.net is a well-regarded independent reference project, not an official registry - used here for the order date (not carried by NavSource) and as a fourth corroboration of the milestone sequence. Decommissioned date on its Brazilian record (28 Jun) matches NGB, conflicting with NavSource's 25 Jun (see gaps). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-04
-
[6]ShipbuildingHistory (T. Colton), 'W. A. Robinson, Ipswich MA' yard table and yard history (live-verified 2026-10-03) [other_primary]
- Locator
- shipbuildinghistory.com/shipyards/emergencysmall/robinsonma.htm production table row 'SC 765'; yard-history header paragraph; historicipswich.net robinsons_shipyard1.pdf
- Finding type
- vessel_history
- Finding
- Builder's-yard record: SC-765 appears in the W. A. Robinson production table as a 136-ton, 110-foot 'Sub Chaser' for the US Navy, delivered 3-Dec-42, disposition 'To Brazil 1943 as Jaguarao (CS 55)'. Yard context: William A. Robinson bought a small yard on Fox Creek near Ipswich in 1937 intending to build wooden sailing vessels; wartime production included submarine chasers, minesweepers and landing craft - over 200 vessels total by secondary account; Robinson closed the business after the war and the yard was razed. An Ipswich historical account (historicipswich.net) adds that the yard employed ~600 workers at wartime peak, ran around-the-clock wartime shifts, and received the Army-Navy 'E' award in 1942; it was the first yard in the country to produce a ship under the First Defense Act of 1940.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942 (construction); yard active 1937-1945
- Population
- W. A. Robinson yard workforce (~600 at peak; wooden-vessel construction trades, 1942)
- Limitations
- ShipbuildingHistory is a researcher-maintained reference site, not an official registry; the yard-employment and 'E' award details come from a secondary historical account (historicipswich.net PDF), not primary records. Establishes builder, tonnage, delivery date and wartime yard operations - no material or asbestos content. W. A. Robinson yard is absent from the Atlas shipyards.json dataset (carried in gaps).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-05
-
[7]Library of Virginia, World War II Separation Notices: Navy (NAVPERS-553), separation notice of William Henry Brunson, StM1c - transcribed via FromThePage (partial verification: page indexed in search results; direct fetch returns HTTP 403 to automated access) [other_primary]
- Locator
- FromThePage work-1140037-004-003-001, display page 35213124 - 'Record of Naval Service / Service Vessels and Stations' field
- Finding type
- historical_record
- Finding
- A primary personnel record documents a named enlisted man serving aboard this hull: the NAVPERS-553 separation notice of William Henry Brunson (Steward's Mate 1/c, serial 659 02 97; entered service 1942-09-21, Richmond VA) lists among his service vessels and stations 'NTS NOB NORFOLK VA, USS PC 765, SCTC MIAMI FLA, USS PC 1254...' - placing him aboard USS PC 765 during its 75-day U.S. commission and then at the Submarine Chaser Training Center, Miami, consistent with the ship's transit to the Miami transfer point. This is the only located primary documentation naming an individual U.S. crew member.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Population
- StM1c William Henry Brunson and the PC-765 US complement (~28), Dec 1942 - Feb 1943
- Limitations
- Crew-service documentation, not an exposure record - establishes a named individual served aboard, nothing about asbestos or materials. Partial verification: FromThePage returns HTTP 403 to automated fetches and no Wayback capture was retrievable this session (archive.org API 429); the transcribed record content was located via search indexing of the LVA/FromThePage work item. Underlying document is a Library of Virginia archival record.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-06
-
[8]Era inference built on: NavSource specifications (two GM 8-268A diesels, reduction gear, two shafts - diesel, no steam plant) and SC-497-class context (NavSource index: 580 wood-hulled 110-foot submarine chasers built, 142 to Allies under Lend-Lease); GAO HRD-80-2 Navy asbestos program documentation (see ev-08) [other_primary]
- Locator
- NavSource specifications block and SC index class summary; GAO HRD-80-2 (ev-08)
- Finding type
- asbestos_application
- Finding
- A wood-hulled, diesel-powered 110-foot submarine chaser built in 1942 sits inside the Navy's documented asbestos-use era, but the plausible aboard applications are narrow compared to steam vessels: no boiler or turbine plant means no steam-line or boiler lagging pathway; era-consistent applications aboard a vessel of this type are confined to machinery-space items - diesel exhaust lagging, gaskets, valve packing, and electrical insulation. Her US Navy career of 75 days bounds any US-flag exposure window; the 1943-1950 Brazilian service (and any Brazilian yard work) is outside US documentation streams.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1950
- Population
- W. A. Robinson construction trades (1942); US crew Dec 1942-Feb 1943; Brazilian crew 1943-1950; any Brazilian-yard trades at conversion/overhaul (undocumented)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or abatement record located for PC-765/SC-765. Names era-standard applications, not confirmed installed materials. No quantity, no manufacturer attribution. Wooden hull construction further reduces the product footprint relative to steel combatants.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s - spanning this hull's entire construction (1942) and US service era (1942-43).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, established in prior batches) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-08
-
[10]Batch-8138 search ledger (this record): NavSource SC-765; NARA Special List #44 (verified in PDF); uboat.net ship records 8982/10101; ShipbuildingHistory Robinson yard; NGB Jaguarão; NHHC DANFS URL attempt (404); FromThePage LVA separation notice (403-blocked); NVR check; secondary web sweeps; CourtListener (pending/blocked - fleet pacing) [other_primary]
- Locator
- search_ledger rows sl-uss-pc-765-pc765-01 through -10
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum documentation, or verified litigation naming PC-765, SC-765, or Jaguarão was found in the public sources searched. CAVEAT: the four CourtListener base queries ('PC-765' and 'SC-765', opinion and docket indexes) could not be completed at draft time - the fleet-wide CourtListener pacing budget (~58/hr shared across concurrent sessions) was spent throughout this session; logged as pending/blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced no qualifying case and no ship-specific asbestos material; the only 'asbestos' content associated with SC-class subchasers is law-firm marketing material - excluded by source policy.
- 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 - and the litigation repository search is a genuine open gap (pacing-blocked at draft time). The NARA-held deck logs (12/3/1942-2/16/1943), W. A. Robinson contract/work records, and Brazilian naval archives are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-09
-
[11]Designation/class cross-check: NavSource SC-765 page (canonical 'SC-765 ex-PC-765', 'SC-497 Class Submarine Chaser'; SC index documents the ex-PC renumbering block SC-978 through SC-1049+ and 'There is no DANFS history available for SC-765'); uboat.net (SC-497 class); NGB ('ex-USS SC 765, Classe SC 497/J'); ShipbuildingHistory ('SC 765 ... Sub Chaser'); NHHC DANFS URL for SC-765 returns 404 [other_primary]
- Locator
- NavSource 12/150765.htm and 12/01idx.htm SC index; uboat.net ship/8982; NGB J013; shipbuildinghistory robinsonma.htm; NHHC DANFS URL attempt
- Finding type
- historical_record
- Finding
- CORRECTION (two points): (1) Class - the batch brief flagged the class as PC-461; every authoritative source classifies this hull as SC-497 (110-foot wooden submarine chaser). The PC-765 designation was her as-commissioned designation (NavSource: 'Commissioned USS PC-765, 3 December 1942'), and the US Navy reclassified her SC-765 in April 1943 after she was already in Brazilian service - the SC-497-class hulls in the PC-9xx block were administratively renumbered (NavSource's SC index carries the parallel 'SC-978 ex-PC-978' ... 'SC-1049 ex-PC-1049' sequence). She was never a PC-461-class 173-foot steel patrol craft. (2) DANFS - the batch brief states 'DANFS documents SC-765 commissioned 1942-12-03,' but no DANFS entry exists for this hull (NavSource states none; NHHC DANFS URL 404). The 1942-12-03 commissioning is instead corroborated by NavSource, uboat.net, the Brazilian NGB record (USN incorporation 3 December 1942), ShipbuildingHistory (delivered 3-Dec-42), and NARA deck-log coverage beginning that date.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (designation window)
- Limitations
- Corrects classification and source-attribution errors, not a material claim. The precise administrative mechanism/date of the PC-to-SC renumbering (April 1943 per NavSource) rests on that compilation; no BuShips directive was located. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-765-pc765-10