Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
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[1]research packet 935-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-763-pc763-pkt-935-packet-md
-
[2]NARA Special List No. 44 - List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (ship-number order), RG 24 Entry 118 coverage [other_primary]
- Locator
- NARA Special List 44, ship-number PDF, p.110 - line 'SC-763 10/20/1942 12/7/1942'
- Finding type
- vessel_history
- Finding
- NARA's catalog lists U.S. Navy logbooks for SC-763 covering 10/20/1942 through 12/7/1942 and nothing before or after - federal-records corroboration of a U.S. commission spanning only the window from commissioning (20 October 1942) to transfer to Brazil (7 December 1942). NARA catalogs the hull as SC-763 although she was commissioned as PC-763, consistent with the April 1943 administrative reclassification recorded by NavSource.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- U.S. Navy crew, 20 October - 7 December 1942 (approx. 28 per class specification)
- Limitations
- The catalog establishes logbook coverage dates, not the logs' contents; the logs themselves (RG 24, Entry 118, National Archives Identifier 581208) were not pulled this session - an open archival lead. Documents only the U.S. service window; contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-01
-
[3]NavSource Online: Submarine Chaser Photo Archive - SC-763 ex-PC-763 (timeline, specifications, Brazilian career); NavSource Submarine Chaser Photo Index (class-wide ex-PC designations) [other_primary]
- Locator
- NavSource SC-763 ex-PC-763 page, history block and specifications block; index at https://www.navsource.net/archives/12/01idx.htm; sister pattern https://www.navsource.net/archives/12/150762.htm
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 23 March 1942 by W. A. Robinson, Inc., Ipswich, MA; launched 25 September 1942; commissioned USS PC-763 on 20 October 1942; transferred to Brazil 7 December 1942 and named Javari (CS 51); reclassified SC-763 by the U.S. Navy in April 1943 (while already in Brazilian service); reclassified J-1 after World War II; ran aground in 1949; decommissioned 29 September 1949 and scrapped. Specifications: 148 t; 110 ft 10 in; beam 17 ft; draft 6 ft 6 in; 15.6 kt; complement 28; one 3 in/23 mount, two 20 mm mounts, two Mousetrap and two K-Gun depth-charge projectors, two depth-charge tracks; propulsion two 880 bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. The page states 'There is no DANFS history available for SC-763.' The class-wide pattern is corroborated by the NavSource Submarine Chaser Photo Index, which lists essentially every SC-497-class unit as 'ex-PC-###', and by sister SC-762's page showing the identical commissioned-PC / reclassified-SC-April-1943 sequence.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1949
- Population
- W. A. Robinson yard workers (1942); U.S. Navy crew (Oct-Dec 1942); Brazilian Navy crew (1942-1949/51)
- Limitations
- NavSource is a volunteer-compiled secondary naval archive, not a primary federal record; its Brazilian fate ('ran aground 1949, decommissioned 29 September 1949 and scrapped') conflicts with NGB's 1951 strike date - carried in gaps. Its 'no DANFS history' statement is consistent with a site search of history.navy.mil returning no SC-763 entry. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-02
-
[4]Navios de Guerra Brasileiros (NGB) - Caca Submarino Javari, CS 51/J 1 (roster page citing Mendonca & Vasconcelos 1959 and Saldanha da Gama 1982) [other_primary]
- Locator
- NGB Javari CS 51/J 1 page - 'Datas' and 'Historico' blocks
- Finding type
- vessel_history
- Finding
- Brazilian naval-history roster for this hull: keel laid 23 March 1942; launched 25 September 1942; incorporated into the U.S. Navy 20 October 1942; struck from the U.S. Navy 7 December 1942 and incorporated into the Brazilian Navy the same day; struck from the Brazilian Navy 1951. Javari (CS 51) was the fifth Brazilian warship of the name, honoring the Javari River; first Brazilian commanding officer Capitao-Tenente Aristides Pereira Campos Filho. On 19 July 1944 Javari was escorting the Brazilian transport Vital de Oliveira from Vitoria to Rio de Janeiro when the transport was torpedoed by the German submarine U-861. Reclassified J-1 after World War II. NGB's data block gives propulsion as two General Motors 16-184A 16-cylinder 'Pancake' diesels of 1,200 bhp on two shafts (engine-model variance vs. NavSource's 8-268A - carried in gaps) and class acquisition cost of US$500,000 in 1942-43.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1951
- Population
- Brazilian Navy crew (1942-1951); convoy escort duty, South Atlantic 1944
- Limitations
- Secondary Brazilian historical compilation (Portuguese-language; cites Mendonca/Vasconcelos, Repositorio de Nomes dos Navios da Esquadra Brasileira, 3d ed. 1959, and Saldanha da Gama, A Marinha do Brasil na Segunda Guerra Mundial, 1982). Its 1951 Brazilian strike conflicts with NavSource's 1949 decommission/scrapping - unresolved. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-03
-
[5]uboat.net Allied Warships of WWII - USS SC-763 (SC-763) vessel table and BZ Javari (CS 51) vessel table (former name USS PC-763) [other_primary]
- Locator
- uboat.net ship/8980 (USS SC-763) and ship/10103 (BZ Javari CS 51) vessel tables
- Finding type
- vessel_history
- Finding
- uboat.net record for this hull: SC-497-class submarine chaser, pennant SC-763, built by W. A. Robinson Inc. (Ipswich, Massachusetts); ordered 16 February 1942; laid down 23 March 1942; launched 25 September 1942; commissioned 20 October 1942; end of U.S. service 7 December 1942; 'Transferred to Brazil on 7 December 1942 being renamed Javari.' The companion BZ Javari (CS 51) table records the former name as USS PC-763 and Brazilian commission 7 December 1942.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- U.S. Navy crew (Oct-Dec 1942)
- Limitations
- Reputable secondary database (Gudmundur Helgason), not an official record; corroborates dates established by NavSource, NGB, and NARA. The order date of 16 February 1942 appears only here. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-04
-
[6]ShipbuildingHistory.com (Tim Colton) - W. A. Robinson yard table, Ipswich, MA [other_primary]
- Locator
- W. A. Robinson yard table, SC-763 row
- Finding type
- vessel_history
- Finding
- Builder's production table for the W. A. Robinson yard (Ipswich, MA - purchased 1937, built 200+ wartime vessels including LCMs, closed postwar and razed) lists SC-763 as a U.S. Navy 'subchaser', 136 tons / 110 ft, delivered 20 October 1942, 'to Brazil 1942 as Javari (CS 51)'. The same table lists all seven sister Brazil-bound SC-497-class hulls built by this yard (SC-762 Jutai CS 52, SC-764 Jurui CS 53, SC-765 Jaguarao CS 55, SC-766 Juruena CS 54, SC-767 Jaguaribe CS 56, SC-1288 Jacui CS 57, SC-1289 Jundiai CS 58).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942
- Population
- W. A. Robinson construction trades, 1942
- Limitations
- Secondary compilation of construction records; the yard-table date is a delivery date that here coincides with the commission date. The shipbuildinghistory.njscuba.net mirror returned HTTP 500 - the live shipbuildinghistory.com URL is cited. Contains no asbestos information; W. A. Robinson is not an Atlas shipyards.json entry (carried in gaps).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-05
-
[7]Patrol Craft Sailors Association - 110-foot Wood Hull Subchaser (SC) class page + NavSource SC-497-class specification block [other_primary]
- Locator
- PCSA subchaser.html specifications and Lend-Lease table; NavSource 12/150763.htm specification block
- Finding type
- asbestos_application
- Finding
- Class/era inference: the SC-497 class was a 110-foot wooden-hulled craft with diesel propulsion (PCSA: 'Two 1,200 (bhp) Straight 8s or Two GM Pancake Diesel'; NavSource specification block for this hull: two GM 8-268A diesels, two shafts) - no boilers, turbines, or steam distribution system aboard, so the dominant asbestos vectors of steam-driven ships (boiler and steam-line lagging) did not exist on this type. Period asbestos applications aboard a 1942 small combatant of this type would plausibly have been confined to machinery/exhaust-system lagging, gaskets, packing, and electrical insulation. Class program data: 475 ordered, 438 delivered, unit cost US$500,000; 142 lend-leased including 8 to Brazil (PCSA), consistent with the shipbuildinghistory.com yard table.
- Verification
- inferred
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1944
- Population
- Construction trades (multiple small yards, 1941-1944); U.S. and allied crews
- Limitations
- Class/era inference only - no class materials schedule was located and no source documents any asbestos product aboard this specific hull; presence and quantity are not established. The wooden-hull/diesel design means materially less asbestos-containing material than contemporary steam vessels. Does not establish or defeat any exposure or legal claim.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-06
-
[8]Batch-8136 search ledger (this record): NavSource ship and class pages; NARA Special List 44; uboat.net; Brazilian NGB; shipbuildinghistory.com; PCSA; NHHC/DANFS and NVR checks; CourtListener sweep (see search_ledger for final status) [other_primary]
- Locator
- search_ledger rows sl-uss-pc-763-pc763-01 through sl-uss-pc-763-pc763-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, museum hazmat disclosure, government industrial-hygiene record, or litigation naming PC-763, SC-763, or Javari was found in the public sources searched (see search_ledger).
- 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 - it reflects that the hull was disposed of abroad in 1949/1951, before modern hazmat documentation regimes, and is not a museum or maritime-registry vessel. Brazilian Navy disposal records were not searched. Litigation sweep is partial: CourtListener docket-level queries for both designations returned 102 reviewed hits, all name collisions with zero qualifying litigation; the two opinion-level queries were blocked by fleet pacing (see sl-...-11), so the negative finding does not extend to CourtListener opinions.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-763-pc763-07