Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
-
[1]research packet 889-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing on key dates
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing on key dates
- Evidence ID
- uss-built-in-portugal-as-pc1635-pkt-889-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-1635 page (verified live 2026-10-03) [other_primary]
- Locator
- NavSource PC-1635 page, vessel-history block + specifications block
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: 'PC-1635 was built for Portugal.' Laid down as PC-1635 at Estaleiros Navais de Viana do Castelo, Portugal under Off Shore Procurement under the terms of the Military Defense Assistance Pact; floated out of dry-dock (launched) 2 May 1956; commissioned Brava (P 590), 27 December 1956; 'Fate unknown.' Specifications: displacement 366 t.; length 170 ft; beam 23 ft; draft 9 ft; speed 17.5 kts; complement 62; armament two twin 40mm mounts, two twin 20mm mounts, one Hedgehog, four K-guns, two depth charge rails; propulsion four 3,500-bhp 4-stroke 14-V SEMT-Pielstick diesel engines, two shafts. Page states 'There is no DANFS history available for PC-1635' - consistent with the hull never having been commissioned into the U.S. Navy.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1976
- Population
- Portuguese Navy crew (complement 62); ENVC construction workforce, Viana do Castelo, mid-1950s
- Limitations
- NavSource is a curated secondary archive, not a primary record; its PC entries are compiled from Navy lists, Jane's Fighting Ships, and contributor photography (photo here credited to the 1961/62 Jane's edition). 'Fate unknown' is resolved in part by ev-02 (official striking date), but the physical disposition remains undocumented. Materials/asbestos content not addressed.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-01
-
[3]Portaria n. 26/76, de 23 de janeiro (Conselho da Revolucao - Estado-Maior da Armada), Diario do Governo 1.a Serie, N. 19, 1976-01-23, p. 126; diariodarepublica.pt (official Portuguese gazette, verified live 2026-10-03) [federal_register]
- Locator
- diariodarepublica.pt Analise Juridica - Informacoes Gerais - Portaria n. 26/76 (resumo field)
- Finding type
- vessel_history
- Finding
- Official Portuguese Republic gazette record: Portaria 26/76 orders the striking (abate ao efectivo) of the patrol vessels S. Nicolau, Boavista, and Brava and the minesweepers Lajes and Santa Cruz from the fleet, effective 7 January 1976 (producao de efeitos 1976-01-07). This is the primary legal instrument ending NRP Brava's naval service; it resolves the 'fate unknown' in NavSource as to striking date.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1976
- Population
- Portuguese Navy fleet, January 1976
- Limitations
- Documents the administrative striking only - not the physical fate (scrapping, sale, or reuse) of the hull, which remains undocumented. The legal-analysis summary page is official metadata; the scanned original act is linked from the same page.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-02
-
[4]Arquivo Historico da Marinha / Biblioteca Central de Marinha (Portuguese Navy Historical Archive), record PT/BCM-AH/APEPL/NGP/008/000002, 'P 590 NRP Brava' (verified live 2026-10-03) [museum_official]
- Locator
- arquivohistorico.marinha.pt details?id=14930 (documento simples record; Ambito e conteudo field)
- Finding type
- historical_record
- Finding
- Official Portuguese Navy archive record: an undated black-and-white photograph of 'P 590 NRP Brava', captioned 'Patrulha Brava no cais' (patrol vessel Brava at the quay), cataloged in the series 'Navios de Guerra Portugueses: Patrulhas' (Portuguese warships: patrol vessels), covering 1943-1975, from the Arquivo Particular Engenheiro Jose Augusto Paes Pires de Lima collection. Confirms the vessel's existence, type (patrulha), and pennant number P 590 in Portuguese service.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1975
- Population
- Portuguese Navy crew, service era
- Limitations
- A single photograph record; no dates, specifications, service history, or materials content. Confirms identity and service-era existence only - says nothing about asbestos, refits, or disposal.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-03
-
[5]NavSource Online: Submarine Chaser (PC) Photo Index, 'Offshore Procurement under the Mutual Defense Assistance Program (PC-1635 to PC-1646)' block (verified live 2026-10-03) [other_primary]
- Locator
- NavSource PC photo index, OSP/MDAP blocks (PC-1610 to PC-1626; SC-1627 to SC-1634; PC-1635 to PC-1646)
- Finding type
- vessel_history
- Finding
- NavSource PC index explicitly groups PC-1635 through PC-1646 under 'Offshore Procurement under the Mutual Defense Assistance Program' and reads: 'PC-1635 Built in Portugal as Brava (P 590)'; sisters PC-1636 'Built in Portugal as Fogo (P 591)' and PC-1637 'Built in Portugal as Boavista (P 592)'. This index line is the apparent source of the corrupted batch-list name 'USS Built in Portugal as (PC-1635)' - the hull was never named 'Built in Portugal as' and was never a USS vessel: the U.S. Navy assigned hull number PC-1635 for accounting under the OSP program, and the completed craft was delivered directly to the Portuguese Navy as NRP Brava.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1954-1967
- Population
- MDAP Off Shore Procurement program hulls, 1950s-60s
- Limitations
- Correction row: fixes the source-list name artifact. The index's program attribution is consistent with the FRUS record of the OSP program (ev-05) but is itself a compiled secondary index; the underlying USN hull-number assignment document was not located.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-04
-
[6]Foreign Relations of the United States (FRUS), 1951, vol. III, part 1, doc. 135 - State Department cable describing the Off Shore Procurement program (Office of the Historian, verified live 2026-10-03) [other_primary]
- Locator
- FRUS 1951 vol. III part 1 doc. 135, paragraphs 1, 3, 4
- Finding type
- historical_record
- Finding
- Primary U.S. diplomatic record defining the program that funded this hull's construction: 'US program of offshore military procurement (US procurement with dollars of military end items in Europe for transfer to European forces)' whose purpose was 'to activate idle productive resources in Europe and supplement European military production efforts'; 'US offshore procurement will be financed from MDAP end item funds'; 'Equipment procured will become property US Government and may be transferred to any NATO country, including producing country.' Establishes the MDAP Off Shore Procurement mechanism under which PC-1635 was financed, built in a Portuguese yard, and delivered to Portugal.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1951
- Population
- NATO European defense production, 1951-
- Limitations
- Program-level context only - the cable (Oct 1951) defines the OSP mechanism generally and does not name this hull, vessel type, or the specific Portuguese contract; no procurement contract for PC-1635 was located in public sources.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-05
-
[7]ShipbuildingHistory.com (Colton), 'Coastal Patrol Ships Built Since WWII (PCE, PCH, PGH, PHM, PC)' table, updated 2020-12-12 (verified live 2026-10-03) [other_primary]
- Locator
- shipbuildinghistory.com/smallships/pc3.htm, ASW ships table rows 1635-1637
- Finding type
- vessel_history
- Finding
- Independent compiled table corroborating this hull's identity and delivery: row for no. 1635 reads 'Brava (P 590) | Viana do Castelo | Portugal | 366 | 170 | 27-Dec-56 | To Portugal, disposition unknown' - matching NavSource on builder location, tonnage, length, and the 27 December 1956 completion/delivery date. Table preamble describes the program as a post-WWII effort producing 44 corvette-sized ASW ships, 30 built in foreign shipyards; sisters 1636 (Fogo P 591) and 1637 (Boavista P 592) listed at the same yard.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1954-1967
- Population
- Post-WWII coastal patrol ship construction program
- Limitations
- Secondary compiled table, not a primary record. It labels the whole 1600-number block 'PCE' (patrol craft escort) while NavSource uses PC/SC designations - carried as a designation-variant note in gaps. It lists all three Portuguese hulls at Viana do Castelo, conflicting with NavSource's attribution of PC-1637 to Estaleiros Navais do Mondego (Figueira da Foz); the 1636 name is rendered 'Fago' (typo for Fogo).
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-06
-
[8]Negative finding: no ship-specific asbestos documentation located (search ledger sl-07 through sl-12; DANFS absent, NVR not applicable/blocked, Portuguese sources silent on materials, no litigation located via secondary sweeps) [other_primary]
- Locator
- search_ledger rows sl-uss-built-in-portugal-as-pc1635-07 to -12
- Finding type
- historical_record
- Finding
- Systematic search located no ship-specific asbestos record of any kind for PC-1635 / NRP Brava (P 590): no asbestos survey, abatement contract, hazmat disclosure, materials specification, or qualifying litigation naming this hull. The vessel never served the U.S. Navy (no DANFS entry exists; NHHC site search returns no record for PC-1635), was built and crewed in Portugal, and struck in 1976 - a profile for which public materials documentation is effectively nonexistent. CourtListener could not be searched this session (fleet pacing budget spent across six spaced attempts) - logged as blocked in the search ledger, not as a negative result.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-2026
- Population
- ENVC construction workforce; Portuguese Navy crew 1956-1976
- Limitations
- Absence of located documentation is not proof of absence of asbestos aboard; a 1956 NATO-yard warship build plausibly carried era-standard asbestos applications (see ev-08), but no source documents materials aboard this hull. CourtListener sweep remains an open gap.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-07
-
[9]GAO HRD-80-2, 'Asbestos: Navy's Handling of Hazardous Material' (product page description; full text HTTP 403-blocked this session, same standing defect as Batch-01) + NavSource PC-1635 specifications block [gao]
- Locator
- gao.gov HRD-80-2 product description (full text 403); NavSource PC-1635 specifications block
- Finding type
- asbestos_application
- Finding
- Era/program inference only: GAO HRD-80-2 documents U.S. Navy-wide asbestos use and handling in ship construction and overhaul of the era; a small ASW patrol craft built 1956-57 in a NATO-area yard under U.S. MDAP funding to a PC-461-derived design would plausibly have carried era-standard applications - thermal insulation, exhaust lagging, gaskets, valve packing, electrical insulation. Propulsion is diesel (four SEMT-Pielstick engines, two shafts per NavSource): no steam plant aboard, so no boiler/turbine lagging pathway applies.
- Verification
- inferred
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1956-1976
- Population
- ENVC construction workforce 1956; Portuguese Navy crew 1956-1976
- Limitations
- Inference, not a finding about this hull: the GAO report addresses U.S. Navy programs and yards; whether the Portuguese builder's bill of materials for this hull followed U.S. Navy asbestos-era practice is unverified. No ship-specific source documents any asbestos product aboard.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1635-08