Evidence
7 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-7).
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[1]research packet 912-packet.md (4 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-594-pc594-pkt-912-packet-md
-
[2]NavSource Online, Submarine Chaser Photo Archive, PC-594 (live page; states no DANFS history is currently available) [other_primary]
- Locator
- Page header and PC-461-class summary/specifications block
- Finding type
- vessel_history
- Finding
- NavSource identifies this hull as PC-594, a PC-461-class submarine chaser: laid down 1 May 1942 by Dravo Corporation at Neville Island, Pittsburgh, Pennsylvania; launched 7 September 1942; commissioned 9 March 1943; transferred to the War Assets Administration 3 December 1947; and sold to C. Roose of Honolulu, Hawaii. The page gives 450-ton displacement, 173 ft 8 in length, 23 ft beam, 10 ft 10 in draft, 20.2-knot speed, complement 65, and two 2,880-bhp Hooven-Owen-Rentschler R-99DA diesels with Westinghouse reduction gear and two shafts.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1947
- Population
- Dravo construction trades (1942); Navy crew (1943-1947); disposal/salvage workers (post-1947)
- Limitations
- NavSource is a volunteer compilation and is used for the hull chronology/specifications; it contains no asbestos or hazmat finding. It states that no DANFS history is currently available for PC-594. Underlying Navy construction, service, and disposal files were not located in an accessible official ship-history record.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-01
-
[3]University of Hawaiʻi, School of Ocean and Earth Science and Technology, Hawaiʻi Undersea Research Laboratory Archive, Maritime Heritage artifact SBB-6, Patrol Craft USS PC-594 (revised 18 March 2019) [museum_official]
- Locator
- SBB-6 artifact data table and Artifact History / Artifact Condition / Additional Information sections
- Finding type
- vessel_history
- Finding
- HURL's artifact record identifies PC-594 as a PC-461-class patrol craft found 25 August 2003 in the Kewalo area at 435 m depth. It records loss after 3 December 1947, scuttling as the circumstance of loss, redundancy after World War II as the reason, a largely intact but stripped condition with armament gone, and transfer to the War Assets Administration followed by sale to C. Roose of Honolulu. Its artifact history describes Dravo construction, Caribbean convoy duty, passage through the Panama Canal in January 1945, arrival in Tokyo Bay in September 1945 for occupation service, China service, cancellation of a planned Operation Crossroads assignment because of engine trouble, and return to the United States.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-2003
- Population
- Crew and occupation-service personnel; later wreck/scuttling context
- Limitations
- HURL documents wreck identity, condition, and a summary service/disposal history, not asbestos, hazmat, or occupational exposure. The record's 6-officer/53-man figure differs from NavSource's complement of 65; both are retained as source-attributed figures. 'Lost after December 3, 1947' does not provide a scuttling date.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-02
-
[4]Office of Conservation and Coastal Lands, Unseen Landscape: Inventory and Assessment of Submerged Cultural Resources in Hawaiʻi (2017), Table 21, SCR Record 537 [other_primary]
- Locator
- Table 21, collaborative HURL and NOAA surveys in the Hawaiian Islands; SCR Record 537
- Finding type
- historical_record
- Finding
- The Hawaiʻi submerged-cultural-resources inventory lists PC-594 as SCR Record 537, a coastal patrol craft surveyed in 2003 through the HURL/NOAA maritime-heritage effort.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2003 survey; 2017 inventory
- Population
- Submerged cultural-resource survey personnel and wreck site
- Limitations
- The inventory confirms a surveyed submerged-resource site but does not identify asbestos, a material inventory, an occupational exposure, or a complete service/disposal history. Survey data are held by HURL and NOAA partners; the underlying survey package was not retrieved.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-03
-
[5]U.S. General Accounting Office, Navy's Efforts to Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979) [gao]
- Locator
- Report subject/summary and 'Navy's Policy on Use of Asbestos' section, pp. 1-2
- Finding type
- gov_survey
- Finding
- GAO reported that Navy ships contained asbestos in components including clutches and electric cables, and that thermal insulation was the Navy's major use of asbestos aboard ships. The report also describes Navy policy issued in 1975 to eliminate asbestos where suitable alternatives had been designated.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1975-1979 policy/report period
- Population
- Navy ships and shipyard workers; Long Beach and Norfolk Naval Shipyards
- Limitations
- Program-level Navy evidence, not a PC-594 survey or material list. It supports period context for a 1942-built Navy vessel but does not establish that asbestos was installed aboard this hull, identify products or quantities, or establish exposure or legal eligibility. Direct automated fetches of the GAO page/PDF returned HTTP 403; the official product-page/search content was accessed through the web fallback.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-04
-
[6]PC-594 source sweep: NavSource; UH HURL Maritime Heritage; Hawaiʻi submerged-cultural-resources inventory; NHHC/DANFS search; NARA catalog search; NVR search; authenticated CourtListener helper attempt; official asbestos-program sources [other_primary]
- Locator
- Search-ledger rows sl-uss-pc-594-pc594-01 through -11
- Finding type
- asbestos_application
- Finding
- No ship-specific asbestos survey, abatement contract, hazmat disclosure, material specification, or qualifying asbestos-litigation record was verified for PC-594 in the sources searched. Asbestos content aboard this hull is unknown; the available evidence supports only class/era context.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03 research pass
- Limitations
- This is a negative result from the located public sources, not proof that asbestos was absent. The CourtListener litigation sweep is incomplete because the authenticated helper reported the fleet-wide pacing budget was momentarily spent on the first base query; the remaining three required base queries were not run. Firecrawl research was also unavailable because its hosted keyless quota reported a multi-hour reset. NARA deck logs, war diaries, construction specifications, repair records, and the HURL survey data remain archival leads.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-05
-
[7]PC-461-class / 1942 diesel-vessel inference, bounded by NavSource specifications and GAO HRD-80-2 [other_primary]
- Locator
- NavSource PC-594 specifications; GAO HRD-80-2 asbestos-use discussion
- Finding type
- asbestos_application
- Finding
- Era context only: PC-594 was a 1942 steel-hulled PC-461-class diesel submarine chaser. Possible period applications include machinery or exhaust insulation, gaskets, valve packing, electrical insulation, and deck/accommodation materials; because the available hull record identifies diesel engines and no boilers or steam turbines, boiler/turbine lagging is not asserted for this vessel.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1947
- Population
- Construction trades and crew of a 1942 diesel patrol craft
- Limitations
- Inference from class/era and propulsion context, not a finding that any listed product was installed aboard PC-594. No manufacturer, quantity, location, or remaining-condition claim is made. This row cannot by itself establish ship-specific exposure or determine the evidence tier above class/era context.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-594-pc594-06