Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
-
[1]research packet 861-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-1143-pc1143-pkt-861-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-1143 (verified live at navsource.net; navsource.org mirror dead) [other_primary]
- Locator
- NavSource 12/011143.htm header block, specifications block, timeline, and photo captions
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: laid down 17 April 1943 at Defoe Shipbuilding Co., Bay City, MI; launched 25 September 1943; commissioned USS PC-1143, 16 May 1944; call sign Nan-George-William-Victor; decommissioned January 1947 and laid up in the Pacific Reserve Fleet, Columbia River Group; transferred to France 2 March 1951; transferred to South Vietnam in January 1956; scrapped. 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 rocket launchers, four depth charge projectors, two depth charge tracks; propulsion two 1,440 bhp General Motors 16-278A diesel engines (serial nos. 14251 and 14252), Farrel-Birmingham single reduction gear, two shafts. Page states 'There is no DANFS History currently available for PC-1143.' Photos: c.1943 builder's trials (Great Lakes Institute photo via Bob Daly/PC-1181); French-service views; a 10 April 1951 Marine Nationale photo of Glaive and Trident leaving Bremerton; a c. November 1952 Nha Trang, French Indochina view; U.S. Navy photo NH 93780 (RVNS Tuy Dong).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1971
- Population
- Defoe construction trades (1943-44); U.S. Navy crew (1944-47, complement ~65)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry; construction and transfer milestones corroborate shipbuildinghistory.com and French sources, but its name-level French attribution (PC-1143 = Trident P 634) is contradicted by French-side data (ev-04). Contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-01
-
[3]ShipbuildingHistory.com, Defoe Shipbuilding Bay City MI build list (hull #228) [other_primary]
- Locator
- Defoe build table, hull #228 row; yard-history preamble (PC-451/452 design note)
- Finding type
- historical_record
- Finding
- Defoe yard list corroborates this hull's construction: hull #228, 'PC 1143', US Navy submarine chaser, 463d design, 173 ft, delivered 16-May-44. Disposition column reads: 'To Free French 1944 as Glaive (P 632), to Vietnam as Tuy Dong (HQ 04) Struck 1971.' The yard built the class prototypes PC-451 and PC-452 and its PC-452 hull design was adopted for the production class (1964 SNAME retrospective by Defoe VP F. A. Swanson, quoted at defoenet.com).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1971
- Population
- Defoe construction trades (1943-44)
- Limitations
- Secondary compilation of builder records: corroborates keel-to-delivery identity and independently assigns the French name Glaive (P 632) - agreeing with French-side sources against NavSource (see ev-04). Its 'Free French 1944' transfer year is an internal copy error: the hull was in U.S. service through January 1947 and all other sources, including the French navy's own Indochina history, date the transfer 2 March 1951. Its downstream Vietnam naming follows NavSource's chain (Tuy Dong HQ-04/1971), which is itself disputed. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-02
-
[4]uboat.net Allied Warships, USS PC-1143 (PC-1143) - order date, construction, WWII commanding officers [other_primary]
- Locator
- uboat.net ship page 8688, facts block and 'Commands listed' table
- Finding type
- historical_record
- Finding
- Secondary compilation corroborates: ordered 27 February 1942; built by Defoe Shipbuilding Co., Bay City; laid down 17 April 1943; launched 25 September 1943; commissioned 16 May 1944. Wartime commanding officers listed (USNR): J. H. Dillingham (16 May 1944 - mid 1944), G. W. Watson (mid 1944 - mid 1945), R. F. Brandt, Jr. (mid 1945 - late 1945). Its disposition line reads 'Transferred to France after the war being renamed Glaive. Transferred to South Vietnam in 1956 being renamed Tuy Dong' - again the Glaive attribution, against NavSource's Trident.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1956
- Population
- Wartime crew under three successive USNR commanding officers (1944-45)
- Limitations
- Secondary compilation; gives no WWII operational detail beyond the CO list and no citations for the CO dates; order date unverified against a contract record. Its Glaive attribution supports the French-side naming (ev-04) while its Vietnam name follows the Tuy Dong chain. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-03
-
[5]Revel, G. (Service historique de la Marine), 'Mer : Surveillance maritime et fluviale en Indochine,' Revue historique des Armees no. 194 (1994), pp. 142-143 (via Persee); corroborating French fleet-data cards at fringant.net (Glaive P 632, Trident P 634, Indochina pages) and the netmarine 1954/1956 fleet lists; SHM, 'La marine francaise en Indochine de 1939 a 1955,' tome IV (1975), as transcribed on fringant.net [other_primary]
- Locator
- Revue historique des Armees n°194 pp. 142-143 ('Trident (3)' entry); fringant.net/pageglaive.htm + /pagetrident.htm data cards and SHM tome-IV transcription; netmarine.net flot1954.htm (GLAIVE P632); shipbuildinghistory.com Defoe hull #228; navsource.net 12/011143.htm vs 12/011146.htm
- Finding type
- historical_record
- Finding
- DISPUTED IDENTITY - French-name attribution of this hull is split between source families. US compilations (NavSource, navypedia) identify PC-1143 as Trident (P 634), which became RVNS Tuy Dong (HQ-04), struck/scrapped 1971. French-side sources identify Trident as ex-PC-1146 and Glaive (P 632) as ex-PC-1143: (a) the Service historique de la Marine's official 'La marine francaise en Indochine 1939-1955' (tome IV, 1975) states 'TRIDENT : Escorteur côtier ex US PC 1146' - a Trident crew veteran (Rene Daux, on fringant.net) confirms that identity as 'OUI' while correcting the printed itinerary; (b) the fringant.net fleet-data cards give TRIDENT keel 21 Sep 1943 / launch 15 Nov 1943 / entry 13 Jul 1944 = PC-1146's exact milestones, and GLAIVE keel 17 Apr 1943 / launch 25 Sep 1943 / service 16 May 1944 = PC-1143's exact milestones; (c) Revue historique des Armees (SHM-authored, 1994) repeats 'Trident ... Ex-P.C.1146'; (d) shipbuildinghistory.com and uboat.net independently assign PC-1143 to Glaive. Under the French-consistent chain this hull = Glaive (P 632): derniere ceremonie des couleurs 25 June 1956 (transfer to South Vietnam) and 'condamne le 10 juillet 1965' - matching the struck-10-July-1965 / Tay Cay (HQ-05) endpoint rather than Tuy Dong (HQ-04)/1971.
- Verification
- disputed
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1951-1971 (attribution window)
- Limitations
- Unresolved secondary-source conflict. The construction-date match on the French fleet cards and the SHM's own attribution favor PC-1143 = Glaive (P 632), meaning NavSource's Trident (P 634) attribution is likely the error - but no primary registry document was consulted, so this is carried as disputed rather than decided. Decisive leads: SHM Vincennes registry cards for Glaive/Trident and the NHHC caption for photo NH 93780 (ev-07). All sources agree on the 2 March 1951 Bremerton transfer and the 1956 South Vietnam transfer; only the name-level identity and its downstream strike date split.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-04
-
[6]French Indochina service record, transcribed from SHM 'La marine francaise en Indochine 1939-1955' tome IV (fringant.net Indochina page and ship cards; Revue historique des Armees n°194) [other_primary]
- Locator
- fringant.net/pageindo.htm (transfer ceremony and departure paragraph) and /pagetrident.htm (SHM tome-IV transcription + Daux corrections); NavSource Nha Trang photo caption
- Finding type
- vessel_history
- Finding
- Under either name attribution this hull served the French Navy in Indochina 1951-1956. The two ex-PC escorteurs côtiers transferred at Bremerton on 2 March 1951 - Glaive (P 632) and Trident (P 634) - armed at Bremerton until 10 April 1951, lay at San Francisco until 17 April, then departed together for Indochina via Pearl Harbor (24 April - 6 May), Kwajalein (12-15 May), Hollandia (~20-24 May), and Sandakan (28-31 May), arriving Saigon 3 June 1951 (SHM tome-IV text; the Hollandia dates reflect veteran Rene Daux's correction on fringant.net). Both ships were then assigned to the Saigon-based maritime forces (fmeo.dneo / 7e Flottille; dececo 1955) and ran coastal-surveillance sectors in Annam, Cochinchine/Cambodia, and Tonkin until transfer to the Republic of Vietnam Navy - the French colors ceremony was 25 June 1956 on the fringant cards (NavSource carries 'January 1956'; see gaps). NavSource's Nha Trang photo caption places the ship it calls Trident in French Indochina c. November 1952.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1951-1956
- Population
- French Navy crews, both escorteurs côtiers, Indochina 1951-1956
- Limitations
- The transit and theater facts attach to this hull under either attribution (the two ships sailed and served together); operation-level detail in the SHM text is written for 'Trident' and therefore belongs to whichever US hull that was (ev-04) - a Daux correction on the same page states Trident's actual patrol sector was Cam Ranh Bay to the Gulf of Tonkin, not the printed itinerary. French-to-SVN transfer month conflicts: 25 June 1956 (French colors ceremony) vs January 1956 (NavSource). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-05
-
[7]NARA, 'Navy Deck Logs Available in the National Archives Catalog' (digitized-log index checked 2026-10-03) and 'Logbooks of the US Navy at the National Archives' (RG 24, Entry 118 / NAID 581208) [other_primary]
- Locator
- archives.gov/research/military/logbooks/navy-online (digitized index, 'P' section); archives.gov/research/military/logbooks/navy (RG 24 Entry 118)
- Finding type
- historical_record
- Finding
- PC-1143 deck logs are the open primary lead for this hull's undocumented WWII service (1944-47). NARA's digitized deck-log index contains no PC-1143 entries (the only PC-class hulls digitized are PC-572, PC-580, PC-581, PC-618, PC-1263, PC-1264, PC-1265). WWII-era (1941-1959) logbooks are held at NARA College Park in RG 24 Entry 118; the catalog.archives.gov search interface is JS-rendered and could not be queried directly from this session.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1947
- Population
- 1944-47 crew (complement ~65)
- Limitations
- Archival lead only: existence of logs at College Park is inferred from the RG 24 series description, not from a catalog entry for this hull; WWII service detail (theaters, ports, availabilities) remains undocumented in public secondary sources. Absence from the digitized index is verified (index searched by hull number).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-06
-
[8]U.S. Navy photo NH 93780 (RVNS Tuy Dong, half-tone, 1950s-60s) - Naval History and Heritage Command collection, as captioned on NavSource [nhhc_danfs]
- Locator
- NavSource 12/011143.htm photo table (RVNS Tuy Dong HQ-04 row, 'U.S. Navy photo NH 93780')
- Finding type
- historical_record
- Finding
- NavSource captions the RVNS Tuy Dong photograph as 'U.S. Navy photo NH 93780, Naval History and Heritage Command.' The official NHHC caption for NH 93780 likely records the Navy's own hull attribution (ex-PC-1143 or otherwise) and is the most direct single lead for resolving the disputed French/RVN identity (ev-04).
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1956-1971 (image window)
- Limitations
- Archival lead only: NHHC's online image library has no retrievable page for NH 93780 (the numerical-list page for the NH 93000 block returns 404, confirmed 2026-10-03); the photo's existence and number are known only via the NavSource caption, which itself carries the contested Tuy Dong attribution. No caption text verified.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-07
-
[9]NARA guided-research topic, 'Researching Asbestos aboard US Naval Vessel up through 1961' [other_primary]
- Locator
- archives.gov/research/military/navy/guided-topics/asbestos ('Beginning Research' and 'Bureau of Ships General, Confidential, and Secret Correspondence' sections)
- Finding type
- historical_record
- Finding
- Official NARA guidance confirms the research premise for this hull's era: 'The use of asbestos in U.S. Navy materiel from 1941-1961 is a frequently requested topic.' It maps the primary-source pathway for a vessel of this type: Bureau of Ships general/confidential/secret correspondence in RG 19 (1940-61) filed by hull designation - for this hull 'PC1143,' for the class 'PC461 Class,' and for the builder under the private-yard code 'QM/Defoe Shipbuilding' (Bath Iron Works is the manual's example of the QM convention). These Bureau of Ships correspondence series are the undigitized records most likely to hold machinery/material itemizations for this hull.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1961 (guide scope)
- Population
- Navy vessels and shipyard workers 1941-1961 (guide scope)
- Limitations
- Research-methodology guidance, not a record about this hull: establishes that asbestos research for a 1941-61 USN vessel runs through RG 19 hull/class/yard correspondence, and that NARA performs no such research for requesters. None of the cited series was searched; existence of a PC1143 file is unverified.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-08
-
[10]Era inference built on: NavSource spec block (diesel PC-461 class); shipbuildinghistory Defoe list (construction); NARA asbestos research guide (USN asbestos materiel 1941-61, ev-08); GAO HRD-80-2 (ev-10) [other_primary]
- Locator
- NavSource specifications block (propulsion/armament); NARA asbestos guide (era scope); GAO HRD-80-2 (program era)
- Finding type
- asbestos_application
- Finding
- A diesel submarine chaser built April 1943 - May 1944 at Defoe sits inside the documented peak of WWII shipbuilding asbestos use (USMC/Navy industrial-health documentation of the era; Navy asbestos materiel era 1941-1961). Era-standard asbestos applications aboard a steel-hulled diesel patrol craft of this type and period were thermal insulation on exhaust and muffler systems, gaskets, valve packing, electrical insulation and cabling, and deck coverings/adhesives in accommodation spaces. As a diesel craft she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply; the confined-volume exposure dynamic of a 173-ft, 65-man hull does apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1971
- Population
- Defoe construction trades (1943-44); USN crew (1944-47); French Navy crew (1951-56); RVN crew (1956-on)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or builder invoice located for PC-1143. Names era-standard applications, not confirmed installed materials; no quantity, no manufacturer attribution. Does not establish individual exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-09
-
[11]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 U.S. construction and service era (1943-47) and relevant to her later foreign service only insofar as original-era materials would have remained aboard.
- 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 returned HTTP 403 to automated fetch, confirmed 2026-10-03; content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-10
-
[12]Batch-7657 search ledger (this record): NavSource PC-1143/PC-1146 pages; shipbuildinghistory Defoe list; uboat.net; French sources (Revue historique des Armees/Persee, fringant.net, netmarine.net); NARA digitized deck-log index; NARA asbestos research guide; NHHC image catalog (NH 93780 - 404); GAO product page (403); CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-1143-pc1143-01 through -13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located for this hull: no asbestos survey, abatement contract, hazmat disclosure, donation-condition record, or verified litigation naming USS PC-1143 was found in the public sources searched. CAVEAT: CourtListener could not be queried - API returned HTTP 429 via the authenticated helper (server-indicated wait ~12,520 s, i.e., the shared daily quota is spent; logged as blocked, not as a negative result). A secondary web sweep surfaced no qualifying case and no ship-specific 'asbestos aboard' material; yard-level marketing claims about Defoe Shipbuilding (mesothelioma.com, gpwlaw.com, mesotheliomalawyercenter.org, navyshipexposure.com) are excluded by source policy and carry no primary sourcing.
- 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). Deck logs, Bureau of Ships correspondence (RG 19, 'PC1143'/'PC461 Class'/'QM-Defoe' files), French navy registry cards (SHM Vincennes), and any scrapping-contract records are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-1143-pc1143-11