Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 890-packet.md (1 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing on dates
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing on dates
- Evidence ID
- uss-built-in-portugal-as-pc1636-pkt-890-packet-md
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[2]NavSource Online, Submarine Chaser Photo Archive, PC-1636 page (verified live 2026-10-03) [other_primary]
- Locator
- PC-1636 entry text and specifications block
- Finding type
- vessel_history
- Finding
- PC-1635 Class Submarine Chaser / Brava Class Patrol Vessel: laid down as PC-1636 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; completed 11 April 1957; commissioned Fogo (P 591); fate unknown. Specifications: 366 t; 170 ft length; 23 ft beam; 9 ft draft; 17.5 kts; complement 62; armament two twin 40mm, two twin 20mm, one Hedgehog, four K-guns and 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-1636.'
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1957 (construction); to c.1975 (service)
- Population
- Portuguese Navy crew (complement 62); ENVC shipyard construction workforce, Viana do Castelo, 1956-57
- Limitations
- NavSource is a curated secondary reference (the standard public compilation for USN hull numbers), not a primary document; it documents identity, dates, and specifications but contains no materials or asbestos information. 'Fate unknown' stands - no decommissioning or disposal record located.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-01
-
[3]Revista da Armada (official magazine of the Marinha Portuguesa), 2004 issue, pp. 184 and 201 - ENVC naval-construction retrospective (verified live 2026-10-03) [other_primary]
- Locator
- Revista da Armada 2004, p. 201 (Dia da Marinha ENVC retrospective) and p. 184 (ENVC build list)
- Finding type
- vessel_history
- Finding
- Portuguese Navy publication records that 'foram construídos, nos longínquos anos de 1956/57 os patrulhas "Brava" e "Fogo" (classe Maio)' at Estaleiros Navais de Viana do Castelo - the patrol vessels Brava and Fogo of the Maio class were built at ENVC in 1956/57; a companion list gives 'N.R.P. "Brava" 1956' and 'N.R.P. "Fogo" 1957' as ENVC builds for the Portuguese Navy alongside the 1963 fleet oiler S. Gabriel, the four Argos-class boats (1963), and the frigate Almirante Magalhães Corrêa (1968).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1957
- Population
- ENVC construction workforce, 1956-57
- Limitations
- Confirms builder, build years, and Portuguese class name (classe Maio); contains no asbestos/materials information. Does not provide keel-laying, launch, or disposal dates. See also https://www.marinha.pt/conteudos_externos/Revista_Armada/2004/files/basic-html/page184.html
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-02
-
[4]Revista da Armada (official magazine of the Marinha Portuguesa), 2000 issue, p. 179 - 'O patrulha Funchal rebaptizado Maio' (verified live 2026-10-03) [other_primary]
- Locator
- Revista da Armada 2000, p. 179, letter/memoir on Maio-class naming
- Finding type
- vessel_history
- Finding
- Official Navy magazine records that of the eight modern French-type coastal escorts ('oito modernos escoltadores costeiros de tipo francês'), three were built in France (Funchal/later Maio, Porto Santo, S. Nicolau) and five in Portuguese yards: 'Brava' and 'Fogo' at Estaleiros Navais de Viana do Castelo, 'Boavista' at Estaleiros Navais do Mondego, and 'Santo Antão' and 'Santa Luzia' at Arsenal do Alfeite - all named for Cape Verde islands; Portuguese patrol strength then numbered fourteen vessels (six ex-US WWII PCs plus the eight French-type units).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1958 (construction period described); article 2000
- Population
- Portuguese Navy patrol-vessel crews of the 1950s
- Limitations
- A memoir/anecdotal article in the official magazine; it confirms builder assignments and fleet grouping but does not give hull numbers (PC-1636 linkage rests on NavSource and class lists). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-03
-
[5]Arquivo Histórico da Marinha Portuguesa (Archeevo), record 'P 591 NRP Fogo', ref. PT/BCM-AH/APEPL/NGP/008/000003, series 'Navios de Guerra Portugueses: Patrulhas' 1943-1975 (verified live 2026-10-03) [other_primary]
- Locator
- Archeevo description record id=14931, ref. code PT/BCM-AH/APEPL/NGP/008/000003
- Finding type
- historical_record
- Finding
- The Portuguese Navy's historical archive holds a cataloged photographic record of this hull: 'P 591 NRP Fogo' - a black-and-white image described as 'Patrulha Fogo a navegar' (patrol vessel Fogo underway), in the Arquivo Particular Eng. José Augusto Paes Pires de Lima, series Navios de Guerra Portugueses: Patrulhas (coverage dates 1943-1975).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1957-c.1975
- Population
- Portuguese Navy crew, service era
- Limitations
- Archival catalog entry only - confirms the vessel's Portuguese Navy identity and service-era photography but supplies no dates, construction detail, or materials information. Full series coverage ends 1975, consistent with (but not proof of) a mid-1970s disposal.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-04
-
[6]Revista da Armada (official magazine of the Marinha Portuguesa), August 2007 issue, p. 15 (basic-html p. 269) - memoir of patrol vessel Príncipe (verified live 2026-10-03) [other_primary]
- Locator
- Revista da Armada Aug 2007, p. 15 (web pagination 269)
- Finding type
- vessel_history
- Finding
- A first-person Revista da Armada memoir of the 1957 Pamir-sinking period records the Príncipe making 'várias saídas para adestramento da guarnição e manobras ao Sul de Sezimbra e ao longo da costa da Galé juntamente com o P591, "Fogo"' - crew-training sorties and maneuvers south of Sesimbra and along the Galé coast together with P 591 Fogo - placing this hull in operational Portuguese service in the 1957-58 window.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1957-1958
- Population
- Portuguese Navy crew, 1957-58
- Limitations
- Memoir recollection published in the official magazine; it documents operational service in the stated window but nothing about materials, maintenance, or asbestos.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-05
-
[7]U.S. Department of State, Foreign Relations of the United States, 1951 vol. III - ISAC decision on offshore military procurement; see also FRUS 1952-54 vol. VI doc. 735 (Off Shore Procurement ship contracts, Bureau of Ships negotiating teams) [other_primary]
- Locator
- FRUS 1951 v.III doc. 135 (OSP decision and financing); FRUS 1952-54 v.VI doc. 735 (BuShips shipbuilding contracts in Europe), history.state.gov
- Finding type
- historical_record
- Finding
- Official U.S. documentation of the program that produced this hull's PC number: the 'US program of offshore military procurement (US procurement with dollars of military end items in Europe for transfer to European forces)' was 'financed from MDAP end item funds'; FRUS 1952-54 records the U.S. Navy Bureau of Ships negotiating teams drawing up definitive contracts for ships in European yards. This is why a hull built in Portugal for the Portuguese Navy carried a USN PC-series administrative number.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1951-1954 (program documentation)
- Limitations
- Program-level documentation; does not name PC-1636, Portugal, or any specific hull. Establishes the funding/contract mechanism only - no ship-specific or materials content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-06
-
[8]Revista da Armada (official magazine of the Marinha Portuguesa), issue 475 (2013), p. 24 - 'Ocean Revival: Preparação dos navios para afundamento' (verified live 2026-10-03) [other_primary]
- Locator
- Revista da Armada 475 (2013), p. 24, Ocean Revival preparation column
- Finding type
- abatement_record
- Finding
- Documented asbestos aboard retired Portuguese Navy vessels of this generation: preparing four ex-Navy hulls for the Ocean Revival artificial-reef sinkings off Portimão, specialist contractor Interamianto (Soc. Técnica de Remoção de Amianto, Lda.) 'removeu todo o amianto existente maioritariamente nas casas das máquinas, chaminé e tubagens de água quente' - manually removed all asbestos present, mainly in the machinery spaces, funnel, and hot-water piping of the frigate Comandante Hermenegildo Capelo; removal workers passed through four decontamination chambers, and respirable-fiber air sampling was performed in each treated compartment under Portuguese Environment Agency requirements.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 2012-2013 (documented abatement); vessel construction era 1960s-70s
- Population
- Shipbreaking/decontamination workers (Batistas yard, Alhos Vedros, 2012-13); Portuguese Navy disposal program
- Limitations
- FLEET-LEVEL DISPOSAL RECORD - the decontaminated hulls were other vessels (a Pereira da Silva-class frigate and sister hulls), NOT this ship. Documents that asbestos was standard aboard Portuguese naval construction and that machinery-space/funnel/piping applications predominated; establishes nothing about PC-1636/NRP Fogo specifically. Also documents the era's end-of-life practice (pre-sinking abatement or full scrapping) relevant to this hull's undocumented disposal.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-07
-
[9]Arquivo Histórico da Marinha Portuguesa (Archeevo), ENVC fonds 'ESTALEIROS NAVAIS DE VIANA DO CASTELO S.A. (ENVC)', ref. PT/BCM-AH/0476 (verified live 2026-10-03) [other_primary]
- Locator
- Archeevo description record id=15927, ref. PT/BCM-AH/0476, 'Âmbito e conteúdo' and access fields
- Finding type
- historical_record
- Finding
- The Portuguese Navy's historical archive holds the ENVC company fonds (PT/BCM-AH/0476, 1,459 archival units covering 1951-2010): construction plans for military and civil vessels, plate/profile material lists, test-bench protocols, instruction manuals, contracts, equipment specifications, and photo albums of launches - the archive class notes ENVC was founded 3 June 1944, nationalized 1975, became a public company 1976, and was extinguished 2015 (subconcession to West Sea/Martifer). This fonds is the plausible repository for PC-1636/Fogo hull-specific construction records (materials specifications) should they survive.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1951-2010 (fonds coverage)
- Population
- ENVC workforce (yard-level)
- Limitations
- Repository-level lead: the catalog describes the fonds generally and does not confirm which hulls' files survive; access requires prior written ENVC authorization per the catalog's access conditions. No asbestos-specific documentation is cataloged at this level.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-08
-
[10]Batch-7815 search ledger (this record): NavSource; NHHC/DANFS index; Naval Vessel Register; Arquivo Histórico da Marinha (Archeevo); Revista da Armada archive (marinha.pt); FRUS history.state.gov; CourtListener API v4; shipyards.json cross-check; secondary sweeps (pt.wikipedia class articles, seaforces.org, navalmarinearchive, crew blogs - leads only) [other_primary]
- Locator
- search_ledger rows sl-uss-built-in-portugal-as-pc1636-01 through sl-uss-built-in-portugal-as-pc1636-11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming PC-1636 or NRP Fogo was found in the public sources searched (see search_ledger). No DANFS entry exists and the hull is absent from NVR (never in the USN inventory).
- 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 - 1957 naval construction and the documented Portuguese fleet-level disposal practice are consistent with era-standard materials. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility. The vessel was Portuguese-operated, so exposure claims would not enter U.S. asbestos dockets in any event.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-portugal-as-pc1636-09