Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
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[1]research packet 879-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (strong
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-1236-pc1236-pkt-879-packet-md
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[2]NavSource Online: Submarine Chaser Photo Archive, PC-1236 page - build/milestone timeline, specifications, transfer and disposal record; 'PC-1236 served the Navies of the United States and Brazil' [other_primary]
- Locator
- NavSource 12/011236.htm header timeline and specifications block
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: PC-461 class submarine chaser; laid down 11 January 1943 by Sullivan Dry Dock and Repair Co., Brooklyn, NY; launched 24 April 1943; delivered 31 August 1943 and commissioned USS PC-1236; transferred to Brazil 15 November 1943 as Grajau (CS 7); reclassified G-7 after World War II; used as a training ship in the 1950s and reclassified J-11; placed out of service 11 April 1959; decommissioned 21 December 1959; struck from the Navy list in 1960; fate unknown. Specifications: displacement 280 t (lt) / 450 t (fl); length 173'8"; beam 23'; draft 10'10"; speed 20.2 kts; complement 65; armament one 3"/50 dual-purpose mount, one 40mm mount, three 20mm guns, two Mousetrap depth-charge projectors, four K-gun projectors, two depth-charge tracks; propulsion two 1,440 bhp Fairbanks Morse 38D8 1/8 diesel engines, Westinghouse single reduction gear, two shafts. Page states 'There is no DANFS History currently available for PC-1236.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1960
- Population
- Sullivan Dry Dock construction trades (1943); USN crew Aug-Nov 1943; Brazilian Navy crew 1943-1959
- Limitations
- NavSource is a volunteer secondary compilation tracking official records, not a primary registry - milestone dates generally track NVR/DANFS but no DANFS entry exists for this hull to verify against. 'Struck from the Navy list in 1960' does not specify which navy's list (see gaps). Contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-01
-
[3]DANFS, Barbel I (SS-316) - NHHC live page; service narrative records a rendezvous with 'the submarine chaser PC-1236' on 4 June 1944 [nhhc_danfs]
- Locator
- DANFS Barbel I (SS-316) service narrative, Panama-transit passage (1-7 June 1944)
- Finding type
- vessel_history
- Finding
- The DANFS entry for Barbel (SS-316) records that, en route to Panama on 4 June 1944, Barbel 'joined with the submarine chaser PC-1236 at 0747' before a Panama Canal pilot came aboard approximately four hours later. The reference names this hull number operating on the Panama approaches in mid-1944 - seven months after NavSource records her transfer to Brazil (15 November 1943). The escort may have been the Brazilian-operated Grajau (ex-PC-1236), still identifiable by her USN hull number, or a wartime record error; unresolved (see gaps).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-06
- Population
- Crew aboard during the transit-escort window (June 1944)
- Limitations
- A cross-reference in another vessel's DANFS entry, not a history of this hull. The rendezvous postdates the recorded transfer to Brazil by seven months; whether the escort was the ex-hull under Brazilian flag or a different craft mislogged is not resolved by any located source. No asbestos content. No DANFS entry exists for PC-1236 itself (per NavSource).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-02
-
[4]Navios de Guerra Brasileiros (NGB / naval.com.br), 'CS Grajau - G 7/J 11' vessel file - Brazilian transfer details, specifications at MB incorporation, out-of-service Aviso [other_primary]
- Locator
- NGB vessel file G037 - 'Datas', 'Caracteristicas', 'Historico', 'Relacao de Comandantes' sections
- Finding type
- historical_record
- Finding
- Brazilian naval-history compilation record for this hull (CS Grajau, G 7/J 11, ex-USS PC 1236): built by Sullivan Dry Dock and Repair Co., Brooklyn, NY; keel laid 11 January 1943; launched 24 April 1943; incorporated USN 31 August 1943; transferred and incorporated into the Brazilian Navy 15 November 1943 in a ceremony at Miami, Florida; first commanding officer Capitao-Tenente Antonio Augusto Cardoso de Gastao; first Brazilian Navy ship of the name, honoring a stream in the old Federal District; acquisition cost per unit of this class US$1.7 million (1942-43); out of active service 11 April 1959 by Aviso No. 0847. Specifications at MB incorporation: 280 t standard / 450 t full; 52.73 m x 7.01 m x 3.04 m; diesel propulsion; speed 20 kts; range 3,000 nm at 12 kts; complement 65 (5 officers, 60 enlisted); SF or SL surface radar plus hull sonar.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1959
- Population
- Brazilian Navy crew 1943-1959 (complement 65)
- Limitations
- Secondary compilation, not an official Brazilian Navy registry - dates track NavSource closely (shared or parallel sources). NGB states two 16-cylinder General Motors 16-258S diesels at 2,000 bhp where NavSource gives two 1,440 bhp Fairbanks Morse 38D8 engines - unresolved spec conflict (see gaps); NGB's narrative also says 'lancado em 31 de agosto de 1943' using the delivery date for launch, inconsistent with its own dates table. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-03
-
[5]Sixtant - War II in the South Atlantic, 'Sub Chaser Grajau G7' file under 'Brazilian Navy Northeast Naval Force - Submarine Chasers' [other_primary]
- Locator
- sixtant.net article file 'Sub Chaser Grajau G7' under category 'Brazilian Navy Northeast Naval Force - Submarine Chasers'
- Finding type
- historical_record
- Finding
- Specialist South Atlantic WWII compilation catalogs Grajau (G 7), ex-USS PC 1236, among the submarine chasers of the Brazilian Navy's Northeast Naval Force - the Recife-based force that escorted South Atlantic convoys after Brazil's August 1942 entry into the war. File repeats the Sullivan Dry Dock build, the 15 November 1943 Miami transfer ceremony, first CO Lt. Capt. Antonio Augusto Cardoso de Gastao, decommissioning 21 December 1959, and publishes a Brazilian Navy (SDGM) photograph of the vessel.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1959
- Population
- Brazilian Navy crew, Northeast Naval Force escort duty (1943-45)
- Limitations
- Secondary compilation sharing source material with NGB (identical specifications, same SDGM photo credit via Jose Henrique Mendes) - corroboration, not an independent record. FNN assignment is the site's editorial categorization; no patrol-by-patrol operational record for this hull is published here. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-04
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[6]NavSource Submarine Chaser photo index - PC-461 class overview (construction program, series blocks, class characteristics) [other_primary]
- Locator
- NavSource 12/01idx.htm - '173' Steel Hull' class overview paragraph and series listing
- Finding type
- asbestos_application
- Finding
- Class context for era inference: the PC-461 class comprised 403 173-foot steel-hulled twin-diesel patrol craft ordered for the US Navy in 1941 (NavSource); the class index lists construction in four series blocks totaling 362 hulls (PC-461 to -496; PC-542 to -627; PC-776 to -826; PC-1077 to -1265 - the series containing this hull), built to substitute for larger DDs/DEs around harbors and restricted waters. A 1943 diesel-driven craft of this type would carry era-standard applications rather than the steam-plant asbestos loading of larger combatants: diesel-exhaust lagging, machinery and piping insulation, gaskets, valve packing, electrical insulation, and deck coverings.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1944 (class construction); this hull 1943
- Population
- Construction trades across class yards (1941-44); crews of the class's ~360 craft
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for PC-1236. Diesel plant: no boilers or turbines, so the dominant asbestos pathway of steam vessels (boiler/steam-line lagging) does not apply; applications named are era-standard for the type, not confirmed installed materials. No quantity, no manufacturer attribution.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-05
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[7]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 and service era (built 1943; USN service Aug-Nov 1943; Brazilian service through 1959).
- 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 returns HTTP 403 to automated fetch (confirmed 2026-10-03); content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-06
-
[8]Batch-7732 search ledger (this record): NavSource vessel page and class index; NHHC DANFS (Barbel I cross-reference; no PC-1236 entry exists); NVR; NGB naval.com.br; sixtant.net; Patrol Craft Sailors Association; uboat.net commander index; GAO product page; CourtListener (blocked); secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-1236-pc1236-01 through -09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or verified litigation naming USS PC-1236 / Grajau was found in the public sources searched. CAVEAT: CourtListener could not be queried this session - API returned HTTP 429 with a 6,731-second Retry-After (fleet daily quota exhausted); logged as blocked in search_ledger, not as a negative result. A targeted secondary-web asbestos sweep surfaced no qualifying case and no law-firm marketing claims naming this hull (only unrelated 'PC 1236' collisions).
- 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 (throttled, not run). USN deck logs for the Aug-Nov 1943 commission window, builder's work packages, and Brazilian maintenance records are undigitized leads. The hull's fate after the 1960 striking is unknown, so no scrapping-era hazmat record can exist in located sources. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1236-pc1236-07