Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
-
[1]research packet 1007-packet.md (5 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (with sourcing caveats)
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Evidence ID
- uss-ph-q-y-pgm81-pkt-1007-packet-md
-
[2]NavSource Online: Motor Gunboat/Patrol Gunboat Photo Archive, PGM-81 page [other_primary]
- Locator
- PGM-81 entry, PGM-71 Class Motor Gunboat section, full page
- Finding type
- vessel_history
- Finding
- PGM-81 was built for South Vietnam (PGM-71 class). Laid down by Marinette Marine, Manitowoc, WI; launched 18 May 1966; delivered 21 July 1966, transferred to South Vietnam and named RVN Phú Qúy (HQ 617). Fate unknown. Specifications: 130 t displacement, 101 ft length, 22 ft beam, 6 ft 8 in draft, 18 kts; one 40 mm mount, two twin 20 mm mounts, two .50 cal. machine guns; propulsion two 975 bhp Mercedes-Benz MB820 diesels or eight 250 bhp GM 6-71 diesels, two shafts. NavSource notes there is no DANFS history for PGM-81.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1966-1975
- Population
- RVN crew (approx. 30, class figure)
- Limitations
- NavSource is a volunteer-maintained photo/history archive, not an official Navy record; construction and transfer details here are corroborated by NavalCoverMuseum, Navypedia, and Wikipedia's RVN ship list. Establishes identity and chronology only - contains no asbestos, material, or environmental information.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-01
-
[3]NavalCoverMuseum, Designation PGM - PGM transfer roster (PGM-59 class and PGM-71 class listings) [other_primary]
- Locator
- Designation PGM page, PGM-71 class transfer table, row PGM-81
- Finding type
- vessel_history
- Finding
- The roster records PGM-81 transferred to South Vietnam as Phú Qúy (HQ 617), alongside the full PGM-59/-71 South Vietnam allocation (PGM-59 through -70, -72 through -74, -80 through -83, -91).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1966
- Limitations
- Roster-level confirmation of the hull-number-to-name mapping; contributes no build dates, service detail, or material information. Independent corroboration of the HQ-617 assignment, which the Shipbuilding History table swaps with HQ-616 (see ev-uss-ph-q-y-pgm81-10).
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-02
-
[4]Navypedia, 'PGM59 patrol boats (1963-1966/1975)' - Vietnam coastal-forces ship list and class technical data [other_primary]
- Locator
- Ships table row (ex-Phú Quý); Technical data block; Project history paragraph
- Finding type
- vessel_history
- Finding
- Class documentation: welded steel patrol boats built in the USA specifically for foreign transfer (PGM59/71 class); enlarged variant of the USCG 95 ft cutter with commercial-type machinery and electronics. Table lists ex-Phú Quý built by Marinette Marine, Manitowoc, launched 18.5.1966, completed 7.1966. Class specs: 117 t standard / 142 t full, 30.8 m length, two shafts, 2 x MB820 or 8 x GM 6-71 diesels, 18 kts, complement 30. Project history notes the boats were captured by the Vietnam People's Army and incorporated into the People's Navy; a standing note states the fate of individual boats is unknown.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1963-1975
- Population
- RVN PGM crews (class context)
- Limitations
- Class-level reference (secondary literature); per-row fate data is aggregate only - Navypedia explicitly disclaims individual-boat fates. Establishes design origin and machinery/complement class data, not anything about this hull's material condition.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-03
-
[5]Nha Trang University (state university, Vietnam), 'Tàu không số C235 - bản anh hùng ca trên biển Hòn Hèo' (28/02/2023) [reputable_press]
- Locator
- Article body, paragraphs describing the night of 29/2/1968 pursuit off Nha Trang
- Finding type
- vessel_history
- Finding
- Vietnamese account of North Vietnamese supply ship C-235 (Captain Nguyễn Phan Vinh, Group 125) bound for Hòn Hèo, Khánh Hòa during the Tet 1968 resupply: on the night of 29/2/1968, upon detection off Nha Trang, the RVN dispatched '3 warships: Ngọc Hồi, HQ-12, HQ-617 and 4 other vessels of Coastal Group 25' intending to capture the ship; C-235 landed its cargo at Ninh Phước ~00:30 on 1/3/1968, was pursued down the coast under gunfire and aircraft illumination, and was scuttled by her captain off Ninh Vân. HQ-617 is thus named as one of the intercepting RVN units in the Khánh Hòa engagement of the four-trawler infiltration attempt.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1968-02-29/1968-03-01
- Population
- RVN HQ-617 crew (approx. 30, class figure)
- Limitations
- Vietnamese official-narrative provenance (state-university institutional article drawing on Group 125 history); corroborated independently by Báo Quân đội nhân dân (People's Army Newspaper) article 'Cuộc rượt đuổi chiếc tàu ma' naming the same three units - that page was access-blocked to automated fetch this session (302 loop) though its text is search-indexed. U.S.-side sources (NHHC Market Time monograph, Marolda) confirm the engagement at event level but do not name HQ-617. Narratives diverge on scuttle-vs-gunfire and cargo-recovery details. Vessel-history fact; no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-04
-
[6]Judith C. Erdheim, MARKET TIME (Naval Historical Center, Dept. of the Navy, September 1975), ibiblio/HyperWar transcription [nhhc_danfs]
- Locator
- 'Multitrawler Infiltration Attempt Following Tet' section (pp. 26-27); Appendix A (VNN PCE/PGM characteristics)
- Finding type
- vessel_history
- Finding
- Official Naval Historical Center monograph documenting the VNN PGM role in Market Time coastal surveillance and the coordinated North Vietnamese four-trawler infiltration attempt of 28-29 February 1968 in MR-1, -2, and -4: three trawlers destroyed and the fourth aborted. Confirms at event level the engagement in which Vietnamese sources place HQ-617 (the Khánh Hòa/MR-2 trawler).
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-04
- Study period
- 1965-1973
- Population
- Market Time VNN and U.S. patrol forces (context)
- Limitations
- Operation-level history; does not name HQ-617 or any individual PGM. Marolda's illustrated history (NHHC, 1994) describes the MR-2 trawler as forced aground northeast of Nha Trang and destroyed by gunfire - a scuttle-vs-gunfire divergence from the Vietnamese account carried in ev-04. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-05
-
[7]NavSource sister-hull pages PGM-80, PGM-82, PGM-83, PGM-91 (URLs .../11080.htm, /11082.htm, /11083.htm, /11091.htm) plus the compiled April 1975 escapee roster [other_primary]
- Locator
- NavSource PGM-80/-82/-83/-91 pages; hoangsaparacels.blogspot.com escapee list (secondary compilation from Jane's Fighting Ships 1976-77)
- Finding type
- vessel_history
- Finding
- Disposition context for this hull: NavSource documents PGM-80 (Tây Sa, HQ-615) captured by North Vietnamese forces 30 April 1975 and broken up 1980, and PGM-91 (Tô Châu, HQ-619) captured 30 April 1975 and broken up; PGM-83 (Hòn Trọc, HQ-618) escaped to the Philippines and became BRP Basilan (PG-60); PGM-82 (Hoàng Sa, HQ-616) fate unknown like PGM-81. The compiled Jane's-based roster of RVN ships evacuated to Subic Bay lists PGM escapees HQ-600, HQ-605, and HQ-618 (HQ-604 scuttled at Côn Sơn) - HQ-617 is absent.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1975-1980
- Population
- RVN PGM crews, April 1975 (context)
- Limitations
- Sister-hull outcomes and an evacuation roster establish the pattern and the absence of an escape record for HQ-617, but do not themselves prove this hull's disposition - 'captured April 1975' remains an unverified inference consistent with Navypedia's class-level note.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-06
-
[8]Era inference built on: NavSource PGM-81 spec block (diesel propulsion, 1966 build); Navypedia class technical data (welded-steel construction, commercial-type machinery); GAO HRD-80-2 program context for the documented Navy asbestos era [other_primary]
- Locator
- NavSource PGM-81 spec block; Navypedia technical data block
- Finding type
- asbestos_application
- Finding
- A diesel patrol craft built in a U.S. commercial yard in 1966 has no boiler/steam plant, so the boiler-lagging pathway does not apply. Era-consistent asbestos applications for a small patrol craft of this build period: engine and exhaust-system insulation, machinery gaskets and valve packing, electrical cable insulation, deck coverings/cement, and winch brake linings.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1966 (construction); 1966-1975 (service)
- Population
- Marinette Marine construction trades (1966); RVN engineering crew
- Limitations
- Inference only - no ship-specific document (construction spec, survey, work package, or RVN record) names asbestos aboard this hull. Material list is era-typical, not hull-proven; does not establish quantity, presence today, or any individual exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2
- Finding type
- gov_survey
- Finding
- GAO documentation of Navy asbestos exposure and control efforts in the asbestos era - program-level context for the 1966 construction era of this hull.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1979 (report); asbestos era generally
- Population
- U.S. Navy shipyard workers (program context)
- Limitations
- Program-level context only - fieldwork and findings concern U.S. naval shipyards and Navy vessels; this hull was built in a commercial yard for foreign transfer and is not addressed. gao.gov returns HTTP 403 to automated fetches (standing defect since Batch-01); citation rests on the product-page description, full text not pulled.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-08
-
[10]Batch-8635 search ledger (this record): NavSource hull and sister pages; NavalCoverMuseum PGM roster; Navypedia RVN PGM list; NHHC Market Time monograph; Vietnamese press (NTU, CAND, QDND); NVR; NARA catalog; secondary asbestos/litigation web sweeps; CourtListener (blocked - fleet pace budget) [other_primary]
- Locator
- search_ledger rows sl-uss-ph-q-y-pgm81-01 through sl-uss-ph-q-y-pgm81-13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming PGM-81 / Phú Quý / HQ-617 was found in the public sources searched (see search_ledger). CourtListener opinion coverage: "PGM-81" returned zero results; "Phu Quy" returned only name collisions (United States v. Tran, 568 F.3d 1156 (9th Cir. 2009) - 'Tam Phu Quy Nguyen' is a defendant). Vietnamese and U.S. records for this MAP hull are thin: no DANFS entry exists, no NVR detail page, RVN wartime records are not digitized, and post-1975 disposition is undocumented.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - era inference supports likely presence of asbestos-containing materials in original construction. Litigation coverage is partial, not complete: 2 of 4 CourtListener base queries ran (both opinion indexes clean) before the fleet pace budget was spent; both docket queries remain unrun. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-09
-
[11]Shipbuilding History gunboat table (navalmarinearchive.com mirror of shipbuildinghistory.com data; same table propagated to Grokipedia) [other_primary]
- Locator
- Gunboats (PGM...) Built Since WWII table, rows PGM-80 through PGM-91
- Finding type
- historical_record
- Finding
- CORRECTION: the Shipbuilding History gunboat table lists PGM-81 as 'Phu Quoi', builder Peterson (Sturgeon Bay, WI), built 9-Jul-66, HQ-616 - and gives PGM-82 Hoang Sa as HQ-617. This conflicts with the convergent record: NavSource and Navypedia agree on builder Marinette Marine (Manitowoc) AND launch date 18 May 1966; NavSource, NavalCoverMuseum, Wikipedia's RVN list, and the Vietnamese-language sources all give Phú Quý = HQ-617 with Hoàng Sa = HQ-616 (PGM-82). The table's builder and HQ-number columns for this row (and its PGM-80/-82/-83 rows, all shown as Peterson) are inconsistent with NavSource's per-hull builder attributions (Marinette for -80 through -83; Tacoma Boatbuilding for -91).
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1966
- Limitations
- Adjudication rests on weighing secondary reference works against each other (no builder's plate or contract record located); NavSource+Navypedia agreement on both builder and launch date (18 May 1966) is treated as decisive. Shipbuildinghistory data also mirrors into Grokipedia, propagating the error.
- Atlas source
- true
- Evidence ID
- ev-uss-ph-q-y-pgm81-10