USS PC-767

Evidence

19 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-19).

1. [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-767-pc767-pkt-936-packet-md

2. [2]National Archives Catalog, NAID 134098224, 'USS SC-767 - War Diary, 1/2/43 to 2/16/43' (Records of the Office of the Chief of Naval Operations, WWII War Diaries; digitized deck log, 63 page images) [other_primary]

   Locator

   catalog.archives.gov/id/134098224 image sequence 0683b (log cover), 0684a-b (directions/muster list), 0685a-b (personnel list + 2 Jan page), 0698a (23 Jan page), 0705a (1 Feb underway page), 0714a-b (16 Feb transfer page, secured 1445)

   Finding type

   historical_record

   Finding

   The hull's own U.S. Navy deck log - digitized and page-read this session - documents her entire 45-day U.S. commission: cover titled 'U.S.S. SC-767' attached to the First Naval District, log beginning 2 January 1943 (first daily page 'SHIP PLACED IN COMMISSION AT 1400 - EXERCISES BEING CONDUCTED BY LT. COMM. VARNEY - FIRST WATCH SET AT 1415 - AMMUNITION TAKEN ABOARD ... WAS RECEIVED FROM USN AMMUNITION DEPOT, HINGHAM, MASS. ON INVOICE #S-2295-43 - EQUIPMENT ON ALLOWANCE LISTS TAKEN ABOARD FROM 1500 TO 2000'); fitted alongside through late January (23 Jan: 'TIED UP AT SAME LOCATION - WORK CONTINUING', stores aboard invoice #12805); underway 1 February in Hampton Roads waters (cast off 0958, passed stone jetty, courses set, 'CAPE HENRY RADIO BN. HARD ON STBD BEAM', challenged by YP 261, general quarters sounded); 16 February transfer entry at 'BERTH FOX': '1415 WORD PASSED BY BOATSWAIN TO SECURE THE WATCH. 1416 BRAZILIAN BOATSWAIN PASSED WORD TO SET THE WATCH. SHIP NO LONGER A COMMISSIONED VESSEL OF THE UNITED STATES OF AMERICA. 1434 CAPTAIN, EXECUTIVE OFFICER & QUARTERMASTER REMAINED ABOARD TO ASSIST BRAZILIAN CREW IN MOVING SHIP TO BERTH "FOX"'; final signature 'Thomas S. Moulton, Lieut (j.g.), U.S.N.R., Commanding'. The bound personnel list records 30 U.S. Navy names - two officers (Lt.(j.g.) Thomas S. Moulton, Commanding; Ens. Martin Boucher Jr., Executive Officer) and 28 enlisted - all reporting 2 January 1943 and detached 16 February 1943 except an 8 February exchange (QM3/c Stupler, SoM3/c McMahon, MoMM2/c Stout detached; QM3/c Palmer, MoMM2/c Wasson, S2/c Larson and S2/c Wulff reporting), so 26 were aboard at commissioning and 27 at transfer. Every daily header reads 'Log of the U.S.S. SC 767 / Attached to the FIRST Naval District'.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-01-02 to 1943-02-16

   Population

   30 U.S. Navy crew (2 officers, 28 enlisted per the bound personnel list) for the entire U.S. commission

   Limitations

   Primary-source record for the 45-day U.S. commission only; it documents nothing about Brazilian service (1943-51), materials aboard, or asbestos. The 63-image microfilm set was not exhaustively page-read - cover, directions, muster/personnel list, and daily pages for 2 Jan, 23 Jan, 1 Feb and 16 Feb were read; intermediate days may hold additional detail (drills, visitors, yard work). 'Berth Fox' is unnamed by facility in the pages read; the 1 February Hampton Roads entries place the ship in Norfolk waters but do not name the transfer installation. Personnel names and ratings are transcribed from the handwritten bound list - spellings carry normal longhand-transcription uncertainty.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-01

3. [3]NavSource Online, Submarine Chaser Photo Archive, SC-767 ex-PC-767 (live page verified 2026-10-03) [other_primary]

   Locator

   SC-767 page (12/150767.htm): milestone block, specifications block, photo caption, 'no DANFS' note; index row 'SC-767 ex-PC-767' (12/15idx.htm, 12/01idx.htm)

   Finding type

   vessel_history

   Finding

   The ship-specific page gives the complete documented milestone chain for this hull: SC-497 class; laid down 18 April 1942 by W. A. Robinson, Inc., Ipswich, MA; launched 7 December 1942; 'Commissioned USS PC-767, 2 January 1943'; 'Transferred to Brazil 16 February 1943 and named Jaguaribe (CS 56)'; 'Reclassified SC-767 by U.S. Navy in April 1943'; 'Reclassified J-6 after World War II'; 'Decommissioned in 1951'; '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 diesel engines, Snow and Knobstedt single reduction gear, two shafts. Header 'SC-767 served the Navies of the United States and Brazil'; index lists her as 'SC-767 ex-PC-767'. Photo caption: 'Refueling from the Brazilian Cruiser Bahia' (source: sixtant.net). Page states 'There is no DANFS history available for SC-767.'

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1942-1951

   Population

   W. A. Robinson construction trades (1942); U.S. crew (muster of 30) Jan-Feb 1943; Brazilian crew (~27) 1943-51

   Limitations

   Ship-specific identity and milestone record, but NavSource is a volunteer photographic-history compilation, not a Navy registry or material survey. Two entries conflict with the hull's own deck log (ev-01): the page styles her 'USS PC-767' at commissioning and dates the SC-767 reclassification to April 1943, yet the ship's log titles her 'U.S.S. SC 767' from commissioning day 2 January 1943 through transfer - the designation question is documented in ev-08. 'Decommissioned in 1951 / Fate unknown' rests on this compilation and NGB; the official Brazilian sheet records no baixa date. Contains no asbestos finding, no maintenance or abatement record, and no exposure evidence.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-02

4. [4]Marinha do Brasil, Diretoria do Patrimonio Historico e Documentacao da Marinha (DPHDM), 'JAGUARIBE - Caca-Submarino' official ship record sheet (3 pp., Portuguese; live PDF verified 2026-10-03) [other_primary]

   Locator

   DPHDM fact sheet JaguaribeCacaSubmarino1943s.pdf, pp. 1-3 (incorporation/baixa lines; description; characteristics; armament; electronics; crew; '43.362 milhas ... 48 comboios'; operations list)

   Finding type

   vessel_history

   Finding

   The Brazilian Navy's official historical-directorate record sheet for this hull: 'Incorporacao: 16 de fevereiro de 1943. Baixa: Nada consta.' Wooden-hulled submarine chaser ('casca de madeira'), sixth of a series of eight built in the United States (sisters Javari, Jutai, Jurua, Juruena, Jaguarao, Jacui, Jundiai); launched 7 December 1942 and delivered to the Brazilian government 16 February 1943; 'Durante o periodo que esteve na Marinha estadunidense era o SC 767, ao ser incorporado para a Marinha do Brasil recebeu o indicativo CS 56, sendo alterado posteriormente para J-6.' Characteristics: 108 t maximum displacement; 34.02 m overall length; 5.5 m beam; 1.83 m draft; two General Motors 8-268A 2-stroke 8-cylinder diesels of 500 HP each on two shafts, maximum 15 knots; DC electrical from two diesel generator sets (30 kVA, 20 kVA). Armament: one 3"/23-caliber Mk XIV (1918) 76mm gun, two Oerlikon 20mm Mk II AA, two stern depth-charge racks (4 bombs each), four single rail launchers abaft, two single mortars, ~20 depth charges of 135 kg. Electronics: RCA WEA-1 listening gear with chemical distance recorder; Westinghouse TCE-2 125W transmitter. Crew: 3 officers, 2 subofficers, 7 sergeants, 4 corporals, 11 seamen (27). WWII service totals: 43,362 miles, 198 days at sea, 48 convoys escorted; named operations include 1 June 1943 rescue of 20 survivors of the Greek merchant Adelfotis off Natal, 4 October 1943 surface escort of submarine Tupi Recife-Salvador, 31 May 1945 man-overboard rescue from U.S. merchant Finmore, 29 July 1945 Itamaraca investigation for cruiser Bahia survivors, 5 November 1945 Victory Naval Parade Rio de Janeiro.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-1951

   Population

   Brazilian crew of ~27 per commission era (1943-51)

   Limitations

   Highest-authority record for the Brazilian career - an official navy historical-office sheet - but it is the Brazilian file: 'Baixa: Nada consta' means the directorate records no disposal/decommission date, so the secondary '1951' figure (NavSource/NGB) is uncorroborated by this source, and post-1951 fate is undocumented. The eight-ship series is described in the aggregate; figures like 108 t displacement and 500-HP engines are this office's record for the type in Brazilian service. Contains no asbestos, materials, or maintenance content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-03

5. [5]National Archives, Special List #44, by Ship Numbers (ship logbook index PDF) [other_primary]

   Locator

   sl-44-ship-number.pdf, ship-number table p. 111: row 'SC-767 1/2/1943 2/16/1943' (context rows SC-765, SC-766, SC-768)

   Finding type

   historical_record

   Finding

   NARA's ship-number logbook index carries the row 'SC-767 1/2/1943 2/16/1943' - commissioning day to transfer day, exactly spanning the hull's 45-day U.S. naval service. The index also illustrates the lend-lease pattern for the Brazil block: sister SC-765's coverage ends the same day (12/3/1942-2/16/1943) and SC-766's at her own earlier transfer (11/14/1942-12/30/1942), while retained U.S. hulls like SC-768 run to mid-1945. The underlying SC-767 logs are the digitized deck log read in ev-01 and the muster-roll file in ev-05.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-01-02 to 1943-02-16 (indexed coverage)

   Population

   SC-767 U.S. crew across the 45-day commission

   Limitations

   The list is an index, not logbook content; it establishes listed coverage dates only. The corresponding deck log (ev-01) and muster rolls (ev-05) were separately located and the key pages read this session. No asbestos or materials content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-04

6. [6]National Archives Catalog, NAID 192200328, 'SC-767, 1/2/43-2/16/43' (RG 24, Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities; microfilm Roll 6886; 14 digitized page images via Ancestry partnership) [other_primary]

   Locator

   catalog.archives.gov/id/192200328 - fileUnit 'SC-767, 1/2/43-2/16/43', RG 24 muster rolls, Roll 6886, 14 digital objects

   Finding type

   historical_record

   Finding

   A second ship-specific personnel record exists in digitized form: the hull's muster rolls for her entire U.S. commission, 2 January - 16 February 1943, in RG 24 (Records of the Bureau of Naval Personnel), microfilm Roll 6886, scanned and publicly served as 14 page images through the NARA-Ancestry digitization partnership. Together with the RG 38 deck log's bound personnel list (ev-01), this documents the complete named U.S. crew of approximately 30 men for the hull's 45-day U.S. service.

   Verification

   verified

   Role

   archival_lead

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1943-01-02 to 1943-02-16

   Population

   SC-767 U.S. crew (~30 names) 1943-01-02 to 1943-02-16

   Limitations

   Archival lead: the catalog entry and digitized image set establish the muster rolls exist and are public; this session relied on the deck log's bound personnel list (ev-01) for the crew count and did not page-read the muster images themselves. Muster rolls name personnel and ratings - they carry no asbestos, materials, or exposure content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-05

7. [7]Ships of the U.S. Navy, 1940-1945 - Submarine Chasers (official Navy tabulation, HyperWar transcription; live page verified 2026-10-03) [other_primary]

   Locator

   ships-sc.html, 'SC-497 Class' specification block and hull table (row 'SC-762-767 | | 1942-44 | Lend-Lease to Brazil')

   Finding type

   historical_record

   Finding

   The official Navy vessel tabulation transcribed by HyperWar places SC-767 in the contiguous lend-lease block 'SC-762-767 ... Lend-Lease to Brazil' (commission-window column 1942-44) - official-source corroboration that this hull went to Brazil under lend-lease, and that the transfer was a group action covering six contiguous hulls. SC-497 class block: displacement 98 tons; length 110'10"; beam 17'; draft 6'6"; speed 20 knots; armament 1 3"/50, 2x2 .50-cal. mg; complement 2 officers, 20 enlisted; diesel engines, twin screws, 1,200 shaft hp.

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1940-1945 (table coverage)

   Population

   SC-497-class construction trades; SC-767 crew (U.S. commission window 1943)

   Limitations

   Official-source tabulation in secondary transcription; the class-block figures are class-level values that conflict modestly with this hull's ship-specific record (98 vs 148 t.; 20 vs 15.6 kts; 22 vs 28 complement; 3"/50 + .50-cal vs 3"/23 + 20mm + Mousetraps/K-guns; 1,200 shp vs 2 x 880 bhp) - carried in gaps. 'Lend-Lease to Brazil' establishes the transfer mechanism, not the 16 February 1943 date (documented by the deck log and Brazilian official sheet). No asbestos or materials content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-06

8. [8]Shipbuilding History (Tim Colton), W. A. Robinson, Ipswich MA yard table - SC 767 construction register row (live page verified 2026-10-03) [other_primary]

   Locator

   shipbuildinghistory.com/shipyards/emergencysmall/robinsonma.htm - W. A. Robinson table, 'SC 767' row (and SC 1288/1289 rows)

   Finding type

   vessel_history

   Finding

   Independent shipbuilding-register corroboration in the builder-yard table: 'SC 767 | US Navy | Sub Chaser | 136 | 110 | 2-Jan-43 | To Brazil 1943 as Jaguaribe (CS 56)' - builder, 136 light-displacement tons, 110 ft length, 2 January 1943 delivery/commission, and the Brazilian transfer as Jaguaribe (CS 56) all match the ship-specific record. The same table documents the yard's production run including sisters bound for Brazil: SC 1288 ('To Brazil 1943 as Jacui (CS 57)') and SC 1289 ('To Brazil 1943 as Jundiai (CS 58)') - plus SC 677 and SC 1290-1296 - and notes the yard 'built over 200 vessels during the war' (many small craft, incl. LCMs), closing after the war with the site razed.

   Verification

   verified

   Role

   context

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1942-1943 (build/delivery); 1943 (transfer flag)

   Population

   W. A. Robinson construction trades (1942-43)

   Limitations

   Specialist secondary register (Colton); tabulates the commission date as the delivery/entry figure - consistent with, not independent of, Navy milestone records. 'To Brazil 1943' gives no exact transfer date. Tonnage 136 t. is a third displacement figure (vs 148 NavSource, 98 official class block, 108 Brazilian official) - carried in gaps. Yard described as razed after the war, so no surviving operator for follow-on records. No asbestos content.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-07

9. [9]NARA deck log (NAID 134098224) vs NavSource milestone list - SC-767/PC-767 designation discrepancy [other_primary]

   Locator

   NAID 134098224 cover (0683b) and daily page headers (0685b, 0698a, 0705a, 0714a) vs navsource.net/archives/12/150767.htm milestone block + index 'ex-PC-767'

   Finding type

   vessel_history

   Finding

   A designation discrepancy is documented between the compilation record and the hull's own logbook. NavSource lists 'Commissioned USS PC-767, 2 January 1943' and 'Reclassified SC-767 by U.S. Navy in April 1943' - implying she served as PC-767 for her entire U.S. commission (January-February 1943) and became SC-767 only after transfer to Brazil. The hull's own U.S. Navy deck log contradicts this: the logbook cover reads 'U.S.S. SC-767', every daily page header reads 'Log of the U.S.S. SC 767', and the NARA logbook index files her under SC-767 for 1/2/1943-2/16/1943 - the ship operated under the SC-767 designation throughout her U.S. service. The PC-767 element is real but belongs to the pre-commissioning/ordering phase ('ex-PC-767' per the NavSource index; uboat.net lists an order date of 16 February 1942), not to her documented commissioned service.

   Verification

   verified

   Role

   correction

   Documentation level

   ship_specific

   Accessed

   2026-10-03

   Study period

   1942-02-16 (order) - 1943-04 (claimed reclassification)

   Population

   SC-767 U.S. crew (1943)

   Limitations

   The deck log is the stronger source for the in-service designation - a ship's own official record - but the underlying administrative reclassification action (BuShips/CNO hull-symbol change, plausibly a PC-to-SC action applied around or before commissioning) was not located. NavSource's April 1943 date is carried as stated; it postdates the transfer and cannot describe her U.S.-commissioned service. The batch header's 'PC-767' framing is retained as an alias because ordering-phase and compilation records use it.

   Atlas source

   true

   Evidence ID

   ev-uss-pc-767-pc767-08

10. [10]NHHC DANFS canonical URL checks for SC-767 / PC-767 (four variants) [nhhc_danfs]

    Locator

    Four canonical DANFS URL checks (all 404) + NavSource 'no DANFS history available' note; hazegray.org DNS-resolution failure and empty Wayback availability for danfs/submar SC pages

    Finding type

    vessel_history

    Finding

    No live NHHC DANFS entry for this hull was located: the canonical URLs danfs/s/sc-767.html, danfs/s/sc767.html, danfs/p/pc-767.html, and danfs/p/pc767.html all returned HTTP 404 on 2026-10-03, and the ship-specific compilation page states 'There is no DANFS history available for SC-767'.

    Verification

    verified

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    checked 2026-10-03

    Population

    SC-767 archival record

    Limitations

    A missing DANFS entry is an access/catalogue finding, not evidence that no other official record exists - the deck log (ev-01), muster rolls (ev-05), logbook index (ev-04), official U.S. tabulation (ev-06), and official Brazilian record (ev-03) all document this hull. The batch-intake note's 'DANFS documents SC-767 commissioned 1943-01-02' could not be tied to a live DANFS page; the print DANFS submarine-chaser appendix transcription on hazegray.org is unreachable (DNS failure, no Wayback capture of the SC appendix) - logged as an access gap. No claim about asbestos or exposure follows from the absence.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-09

11. [11]Naval Vessel Register historical-detail URL checks for SC-767 and PC-767 (live NVR site verified 2026-10-03) [other_primary]

    Locator

    NVR SC-767 and PC-767 detail URLs (both redirect to register main page) + site note on pre-1987 disposals

    Finding type

    vessel_history

    Finding

    The NVR detail URLs for both designations do not provide a historical vessel record: SHIPSDETAIL_SC_767.HTML and SHIPSDETAIL_PC_767.HTML each resolve to the register's main page (https://www.nvr.navy.mil/nvr/). The NVR states that ships and service craft disposed of before 1987 are generally not currently included; this hull left U.S. service in 1943 by lend-lease transfer.

    Verification

    verified

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1943 transfer; NVR site checked 2026-10-03

    Population

    SC-767 historical registry record

    Limitations

    A current-register catalogue finding, not evidence that no historical Navy disposition file exists - the lend-lease transfer is documented by the official tabulation (ev-06), the deck log transfer entry (ev-01), and the Brazilian official record (ev-03). It does not establish asbestos status or exposure.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-10

12. [12]uboat.net Allied Warships database, USS SC-767 (SC-767) and BZ Jaguaribe (CS 56) pages (specialist secondary compilation; live pages verified 2026-10-03) [other_primary]

    Locator

    uboat.net/allies/warships/ship/8984.html (USS SC-767 data block) and ship/10102.html (BZ Jaguaribe CS-56 data block)

    Finding type

    vessel_history

    Finding

    Specialist secondary corroboration of the milestone chain on both sides of the transfer: USS SC-767 (SC-497 class) - ordered 16 February 1942; laid down 18 April 1942; launched 7 December 1942; commissioned 2 January 1943; end service 16 February 1943; builder W.A. Robinson Inc., Ipswich MA; 'Transferred to Brazil on 16 February 1943 being renamed Jaguaribe'. Brazilian-side page: BZ Jaguaribe (CS 56), SC-497 class, pennant CS 56, commissioned 16 February 1943, 'Former name USS SC-767'.

    Verification

    partial

    Role

    context

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1942-1943

    Population

    SC-767 U.S. crew; Jaguaribe Brazilian crew

    Limitations

    Secondary compilation (Gudmundur Helgason's Allied Warships database) - milestones corroborate the primary record (deck log, ev-01) but the 16 February 1942 order date is uncorroborated by a primary source this session; no commanding-officer table is carried for either flag. uboat.net styles the U.S. ship 'USS SC-767' at commissioning - consistent with the deck log, not with NavSource's 'USS PC-767' styling (see ev-08). No asbestos content.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-11

13. [13]NGB - Navios de Guerra Brasileiros, 'Caca Submarino Jaguaribe - CS 56/J 6' (specialist Brazilian secondary compilation; live page verified 2026-10-03) [other_primary]

    Locator

    naval.com.br/ngb/J/J019/J019.htm - 'Datas', 'Caracteristicas' and 'Historico' blocks incl. commander table

    Finding type

    vessel_history

    Finding

    Brazilian specialist corroboration with additional career detail: keel 18 April 1942; launch 7 December 1942; 'Incorporacao (USN): 2 de janeiro de 1943'; 'Baixa (USN): 16 de fevereiro de 1943'; 'Incorporacao (MB): 16 de fevereiro de 1943'; 'Baixa (MB): 1951' - the 1951 decommission figure NavSource also carries. First Brazilian commanding officer: Capitao-Tenente Valim Cruz de Vasconcellos, assuming command at the 16 February 1943 transfer. Fifth Brazilian ship named Jaguaribe, honoring the Ceara river. Class acquisition cost US$500,000 per unit (1942-43). Reclassified J-6 postwar. Spec block 'da epoca da incorporacao na MB': 98 t standard/130 t loaded; two GM 16-cylinder Model 184A 'Pancake' diesels, 1,200 bhp; 21 kts max; 1,500 nm at 12 kts; one 3"/23 gun, two Oerlikon 20mm Mk 4, two quad 7.2" Mousetrap Mk 20 A/S launchers, two Mk 3 DC racks and two Mk 6 K-guns; SF/SL radar + hull sonar; crew 27 (3 officers, 24 enlisted).

    Verification

    partial

    Role

    context

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1942-1951

    Population

    Jaguaribe Brazilian crew (27) 1943-51

    Limitations

    Specialist secondary source citing official Brazilian references (SDGM name repository; Saldanha da Gama's official WWII history; splinterfleet.org; NavSource). Its spec block conflicts with the higher-authority Marinha sheet (ev-03): NGB lists GM 16-184A 'Pancake' engines/1,200 bhp/21 kts while the official sheet lists GM 8-268A engines/500 HP each/15 kts - both engine types existed class-wide (ev-14), so the official sheet governs this hull's fit. The 1951 baixa date and first-CO name are corroborating but secondary. No asbestos content.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-12

14. [14]The Sixtant (sixtant.net), Brazilian Navy Northeast Naval Force, 'Sub Chaser Jaguaribe CS 56 J6' (specialist secondary compilation on South Atlantic ops; live page verified 2026-10-03) [other_primary]

    Locator

    sixtant.net article 11)SUB CHASER JAGUARIBE CS 56 J6 (milestone list, spec block, Adelfotis paragraph, image captions)

    Finding type

    vessel_history

    Finding

    Specialist South-Atlantic-theater corroboration: repeats the milestone chain, styles the commissioning 'Commissioned USS SC-767, 2 January 1943' (consistent with the deck log, ev-08), and gives the disposal as 'Struck from the Naval Register (1951). Fate unknown.' Carries the Bahia-refueling photograph that is the NavSource page's only image ('Sub Chaser Jaguaribe seen aligning Brazilian Cruiser Bahia during fuel transfer') plus a convoy image. Adds an operational item: on patrol '780 miles off Natal' Jaguaribe rescued survivors of the Greek merchant Adelfotis at 03 20'S 21 32'W - given as 1 May 1943, 19 survivors. Complement listed 3 officers, 24 enlisted; armament listed as one 40mm + two 20mm (a post-war/later fit differing from the as-commissioned 3"/23 + Mousetrap outfit in ev-02 and ev-03).

    Verification

    partial

    Role

    context

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1942-1951

    Population

    Jaguaribe Brazilian crew (1943-45 ops)

    Limitations

    Secondary compilation; its Adelfotis details conflict with the official Marinha sheet (ev-03): sixtant gives 1 May 1943 / 19 survivors vs the official record's 1 June 1943 / 20 survivors - the official date is carried and the conflict logged in gaps. 'Struck from the Naval Register (1951)' conflates decommissioning with striking; the U.S. Navy had no register to strike her from after the 1943 lend-lease transfer, and the Brazilian official sheet records no baixa. No asbestos content.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-13

15. [15]Wikimedia Commons, official Marinha do Brasil photograph: 'Entrega dos CS-55 Caca-Submarino Jaguarao e CS-56 Caca-Submarino Jaguaribe pela Marinha Americana a Marinha do Brasil (1943)' (live page verified 2026-10-03) [museum_official]

    Locator

    Commons file page 52334876601 (title, author 'Marinha do Brasil', 1943 date)

    Finding type

    historical_record

    Finding

    An official Brazilian Navy (Marinha do Brasil) photograph cataloged on Wikimedia Commons documents the 1943 handover: 'Delivery of CS-55 Caca-Submarino Jaguarao and CS-56 Caca-Submarino Jaguaribe by the American Navy to the Brazilian Navy (1943)' - contemporaneous official imagery of the transfer event pairing this hull (CS-56) with her sister Jaguarao (CS-55, ex-SC-766).

    Verification

    partial

    Role

    context

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1943

    Population

    U.S. and Brazilian transfer crews (1943)

    Limitations

    Official-source imagery hosted on a secondary platform (Marinha do Brasil upload to Commons); corroborates the transfer event and the CS-56 identity but carries no date detail beyond the year and no asbestos or materials content.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-14

16. [16]Wikipedia, 'SC-497-class submarine chaser' (secondary reference; live page verified 2026-10-03) [other_primary]

    Locator

    SC-497-class article, infobox (operators, propulsion variants), 'History' section (lend-lease paragraph), Brazilian Navy operator list

    Finding type

    historical_record

    Finding

    Class context for this hull: the SC-497 class comprised 438 wooden-hulled 110-foot subchasers built 1941-44 (the 'splinter fleet'), powered by either of two diesel fits - General Motors 16-184A 'Pancake' or GM 8-268A 2-stroke engines (2 x 1,540 or 880 hp; 21 or 15.6 knots) - which explains the divergent engine/speed figures across this hull's sources. During WWII, 142 class members went to allies under lend-lease: 78 Soviet Union, 50 France, 8 Brazil, 3 Norway, 3 Mexico. The article's Brazilian-operator list maps the eight hulls: Jutai (ex-SC-762), Javari (ex-SC-763), Jurui (ex-SC-764), Jaguarao (ex-SC-765), Juruena (ex-SC-766), Jaguaribe (ex-SC-767), Jacui (ex-SC-1288), Jundiai (ex-SC-1289).

    Verification

    partial

    Role

    context

    Documentation level

    class_or_era

    Accessed

    2026-10-03

    Study period

    1941-1951

    Population

    SC-497-class construction trades and crews; Brazilian subchaser crews

    Limitations

    Secondary source used for class-level context only; the hull's own fit (GM 8-268A) is carried on the ship-specific sources (ev-02, ev-03). Wikipedia is not an authoritative source - the lend-lease figures rest on NavSource and ww2pcsa.org; the Brazil hull-mapping is corroborated by the official U.S. tabulation's lend-lease block (ev-06) and Colton's register rows (ev-07). The article's mapping of Brazilian names to U.S. hull numbers differs in detail from the official sheet's sister list ordering (which lists seven sisters without hull numbers) - carried as consistent in aggregate. No asbestos content.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-15

17. [17]U.S. General Accounting Office, HRD-80-2, Navy Efforts To Protect Workers From Asbestos Exposure (18 October 1979) [gao]

    Locator

    GAO product page hrd-80-2; report summary and 'Navy's Policy on Use of Asbestos' section

    Finding type

    asbestos_application

    Finding

    GAO reports that the Navy told investigators all ships contained some asbestos in components such as clutches and electric cables, that thermal insulation was the Navy's major use of asbestos aboard ships, and that the Navy's policy to eliminate asbestos as an acceptable thermal-insulation material was issued in October 1975. This supplies Navy-wide era context covering this hull's entire construction (1942) and service period (U.S. 1943; Brazilian 1943-51).

    Verification

    verified

    Role

    context

    Documentation level

    class_or_era

    Accessed

    2026-10-03

    Study period

    1942-1951 construction/service era; GAO review 1979

    Population

    Navy shipyard workers and Navy ships in the GAO review; era context for SC-767

    Limitations

    Program-level evidence from a review of Long Beach and Norfolk Naval Shipyards; it does not name SC-767, identify its installed materials, establish asbestos content in any component aboard this hull, or prove exposure. gao.gov returns HTTP 403 to automated fetches (standing access defect since Batch 01); the product-page description and fleet-verified report content were used - the live page could not be re-verified this session.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-16

18. [18]Era inference built on: NavSource specifications (all-diesel GM plant, no steam); HyperWar SC-497 class block (diesel engines, twin screws); official Marinha sheet ('casco de madeira' wooden hull, GM 8-268A diesels); GAO HRD-80-2 Navy-wide shipboard-asbestos use (ev-16); Wikipedia class article (wooden hull, propulsion variants) [other_primary]

    Locator

    NavSource specifications/propulsion block; ships-sc.html SC-497 class block; Marinha DPHDM sheet (casco de madeira); GAO HRD-80-2 (ev-16); Wikipedia SC-497 class article (ev-15)

    Finding type

    asbestos_application

    Finding

    A purpose-built wooden-hulled warship built 1942 at W. A. Robinson, Inc. and in naval commission 1943-51 (45 days U.S.; the balance Brazilian) sits inside the documented Navy asbestos era. Era-standard asbestos applications aboard a small all-diesel wooden warship of this period were engine and exhaust insulation or lagging, gaskets and valve/flange packing, electrical insulation and cable covering, and limited compartment insulation where fitted. As an all-diesel vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - and a 110-foot wooden subchaser carried far less machinery and hull insulation than a steel steam warship. Her extremely short U.S. commission (45 days, almost entirely fitting-out at Ipswich/Hingham and the delivery transit) bounds any U.S.-era exposure window to construction trades at the yard and the 30-man U.S. crew; the 1943-51 Brazilian phase and undocumented post-1951 disposal bound any later service and scrapping-era disturbance.

    Verification

    inferred

    Role

    supporting

    Documentation level

    class_or_era

    Accessed

    2026-10-03

    Study period

    1942-1951

    Population

    W. A. Robinson construction trades (1942); U.S. crew (30) Jan-Feb 1943; Brazilian crew (~27) 1943-51; unknown disposal-era population post-1951

    Limitations

    Class/era inference only - no hull-specific insulation survey, material list, work package, or repair record located for SC-767/Jaguaribe. Names era-standard applications, not confirmed installed materials; no quantity; no manufacturer attribution. A small all-diesel wooden patrol craft carried bounded insulation compared with steam or steel warships; the inference is contextual, not a ship-specific finding. Brazilian Navy asbestos practices and the 1951 disposal are undocumented in the sources consulted.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-17

19. [19]Batch-8140 source review and search ledger [other_primary]

    Locator

    Search ledger rows sl-uss-pc-767-pc767-01 through sl-uss-pc-767-pc767-14

    Finding type

    asbestos_application

    Finding

    No ship-specific asbestos survey, material specification, abatement record, hazardous-material disclosure, asbestos product identification, or verified exposure record for SC-767/PC-767/Jaguaribe CS-56/J-6 was located in the authoritative sources reviewed for this batch - including a page-read of her digitized U.S. deck log (fitting-out, stores and ammunition invoices, transfer ceremony; no materials or insulation content). The record therefore carries no ship-specific asbestos finding and remains Tier 2 based on class/era context only.

    Verification

    partial

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-10-03

    Study period

    1942-1951

    Population

    SC-767 construction trades and crews (U.S. and Brazilian)

    Limitations

    This is a bounded negative finding, not proof that no such record exists. CourtListener litigation status at write time: the 'SC-767' opinion base query completed (2,051 hits, all state supreme-court/docket-number name collisions, zero qualifying asbestos litigation in the top-20 page); remaining base queries ('SC-767' docket, 'PC-767' opinion, 'PC-767' docket) and the justified 'SC-767 asbestos' variant were throttled by the fleet-wide pacing stand-down on three spaced attempts - litigation coverage is partial, logged honestly in the ledger. Brazilian-language litigation and disposal records were outside the source scope.

    Atlas source

    true

    Evidence ID

    ev-uss-pc-767-pc767-18