Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 943-packet.md (2 sources cited) [museum_official]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-819-pc819-pkt-943-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-819 - construction milestones, specifications, call sign, Adak photograph, disposition (live fetch verified 2026-10-03) [other_primary]
- Locator
- NavSource 12/010819.htm header block, specifications block, Adak c.1945 photo caption
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 30 March 1943 by the Albina Engine and Machinery Works, Portland, OR; launched 19 May 1943; commissioned USS PC-819, 28 August 1943; 'Transferred to the Maritime Commission in June 1948; Transferred to Mexico in 1952 as GC-37. Fate unknown.' Spec block: 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 projectiles, two depth charge tracks; propulsion two 2,880bhp Hooven-Owen-Rentschler R-99DA diesel engines (serial nos. 7009, 7010), Westinghouse single reduction gear, two shafts. Call sign Nan-Zebra-George-Sugar. Photo caption places PC-819 at Adak, Alaska c.1945 alongside PC-818, PC-786, PC-778, PC-788, and an unknown PC (photo via Harry Wilson, GM2, USN / Allan M. Wilson). Page states: 'There is no DANFS history available for PC-819.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1952
- Population
- Albina construction trades (1943); crew (1943-48); wartime complement ~65
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track Navy registers but no commissioning location detail, decommissioning date, or stricken date is given. The dual displacement figures (280 lt / 450 fl) likely reflect light vs full-load. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-01
-
[3]Shipbuilding History (shipbuildinghistory.njscuba.net), Albina Engine & Machine Works yard list, Portland OR - yard hull 103 = PC-819 (live fetch verified via firecrawl 2026-10-03; plain curl returns HTTP 500 to automated agents) [other_primary]
- Locator
- Albina yard table row 103 (PC-819); page header yard-history paragraph
- Finding type
- historical_record
- Finding
- Builder's yard-list record for this hull: Albina yard hull number 103, type 'patrol escort', 284 GT, 174 ft LOA, delivered 2 August 1943, 'to Mexico 1952 as GC-37'. The yard history notes Albina Engine & Machine Works was founded 1904 as a repair yard by William Cornfoot on N. River Street in the Albina section of Portland (upstream of the Fremont Bridge), sold to Dillingham Corp. about 1971 (becoming Dillingham Ship Repair), and the original yard closed when the division became Cascade General at Swan Island in 1986.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943
- Population
- Albina Engine & Machine Works construction trades (1943)
- Limitations
- Specialist secondary compilation (Tim Colton's shipbuilding history site) - the 2 Aug 1943 'Delivered' date precedes the 28 Aug 1943 commissioning (delivery vs. commissioning is a normal distinction) but rests on the compiler's yard-table reconstruction, not a cited contract record. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-02
-
[4]uboat.net Allied Warships of WWII, USS PC-819 (PC-819) patrol craft of the PC-461 class - builder, order date, milestones, wartime commanding officers (secondary compilation, live fetch verified 2026-10-03) [other_primary]
- Locator
- uboat.net warship page 8646 - identity table and Commands section
- Finding type
- vessel_history
- Finding
- Corroborating compilation for this hull: built by Albina Engine & Machine Works (Portland, Oregon); ordered 10 August 1942; laid down 30 March 1943; launched 19 May 1943; commissioned 28 August 1943; 'Transferred to Mexico in 1952'. Wartime command roster: Lt. Cmdr. Kenneth Byron Sill, USNR (28 Aug 1943 - early 1944); Lt. E. D. Mendenhall, Jr., USNR (early 1944 - late 1944); Mason G. Cyrus, USNR (late 1944 - early 1945); F. L. Matheson, USNR (early 1945 - mid/late 1945); R. W. Kohankie, USNR (mid/late 1945 - early 1946).
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- crew (1943-46 wartime commands)
- Limitations
- Secondary specialist compilation - order date 10 Aug 1942 is not verified against a primary contract record, and the CO roster's date windows ('early 1944', 'mid/late45') are approximations. History and end-service fields are blank on the page. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-03
-
[5]U.S. Coast Guard Aviation Association history article quoting the Western Sea Frontier War Diary entry for 25 December 1943 and the PC-785/PC-815/PC-819 deck logs (live fetch verified 2026-10-03) [other_primary]
- Locator
- cgaviationhistory.org article body - quoted Western Sea Frontier war diary entry of 25 Dec 1943 and researcher comment 3 on the PC deck logs
- Finding type
- vessel_history
- Finding
- Documented wartime operation for this hull: on 25 December 1943 the Western Sea Frontier war diary records USS PC-785 making a sonar contact in position 32-30 N, 117-30 W (~20 miles southwest of San Diego) and attacking it; 'The USS PC-819 was dispatched to assist in the search at 1200 and the USS PC-815 was ordered to proceed to offer further assistance at 1300.' The article states the deck logs of PC-815 and PC-819 'confirmed the operation but do not list any ammunition expenditures' - PC-819 responded to the contact and expended no ordnance; the incident was officially closed as a probable sunken hulk.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-12-25
- Population
- crew aboard during the 25 Dec 1943 ASW response
- Limitations
- Secondary historical-association article quoting primary records (war diary, deck logs) that were not directly examined this session - the NARA records themselves are undigitized. Establishes the hull was operating off San Diego under Western Sea Frontier in late December 1943; establishes nothing about materials aboard. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-04
-
[6]Navy and Marine Corps Awards Manual, NAVPERS 15,790 (Rev. 1953), Part IV campaign/service-medal ship tables - verbatim transcription via HyperWar/ibiblio, sections swept 2026-10-03 [other_primary]
- Locator
- Awards-IV-13 through Awards-IV-17 ship tables (HyperWar transcription), 'PC 8xx' ranges checked
- Finding type
- historical_record
- Finding
- No campaign-credit entries for this hull: 'PC 819' appears in none of the NAVPERS 15,790 Part IV ship tables (Asiatic-Pacific sections 2-13 through 2-17 swept; adjacent hulls PC 814, PC 802, PC 804, PC 807 do appear with occupation-duty and campaign windows). No battle stars or campaign-participation credits were located for PC-819 - consistent with post-campaign Aleutian patrol service (the Aleutian Islands campaign ended August 1943, the month she commissioned).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1946 (eligibility windows)
- Limitations
- Negative result within one official manual: absence from the 1953 awards tables means no medal-eligibility windows were credited, not that the ship saw no wartime service - patrol duty without a designated campaign generates no table entry. The HyperWar transcription is verbatim but unofficial; the underlying manual is not hosted live on an NHHC page.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-05
-
[7]Ships of the United States Navy, 1940-1945 - PC-461 class specification block and hull-number index (verbatim transcription via HyperWar/ibiblio, live fetch verified 2026-10-03) [other_primary]
- Locator
- ships-sc.html PC-461 class block; NavSource PC index 12/01idx.htm class-series description
- Finding type
- vessel_history
- Finding
- Class context for this hull: the PC-461 class specification block gives displacement 284 tons; length 173'8"; beam 23'; draft 10'10"; speed 21 knots; armament 1 x 3"/50, 1 x 40mm, 5 x 20mm, 2 depth charge throwers (mousetraps), 2 K-guns, 2 depth charge racks; complement 65; 'Diesel engines, 2 screws, 2,280 shaft hp.' PC-819 sits in the third construction series (PC-776-826). NavSource class index counts 362 WWII-built 173-foot steel-hulled PCs in four series (PC-461-496, PC-542-627, PC-776-826, PC-1077-1265).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1946
- Population
- class-level: construction and wartime crews across ~360 hulls
- Limitations
- Class-level specification block, not this hull's fitted state: wartime armament fits varied across hulls and the NavSource spec block for PC-819 itself lists different engine ratings (2,880bhp H-O-R) and armament (3 x 20mm, 2 rocket launchers) - see gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-06
-
[8]Era inference built on: NavSource specifications for this hull (two 2,880bhp Hooven-Owen-Rentschler R-99DA diesels, serial nos. 7009/7010, Westinghouse reduction gear, 2 shafts - a diesel plant, no steam); HyperWar PC-461 class spec block; GAO HRD-80-2 Navy asbestos-era program documentation (see ev-08) [other_primary]
- Locator
- NavSource 12/010819.htm specifications; HyperWar ships-sc.html PC-461 block; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A steel-hulled patrol craft built March-August 1943 in a U.S. yard for WWII service sits inside the documented Navy asbestos-use era; era-standard applications aboard a diesel patrol craft of this type and period were pipe and machinery insulation, diesel-exhaust lagging, gaskets, valve packing, electrical insulation, and asbestos-containing construction materials (deck covering, bulkhead joiner/panel materials). The diesel plant carries no boilers or turbines - the boiler/turbine lagging pathway of steam vessels does not apply, and the small crew (~65) means a far smaller exposed population than a capital ship.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-unknown
- Population
- Albina construction trades (1943); crew ~65 (1943-48); Mexican crew as GC-37 (1952-unknown); any disposal/scrapping trades
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or litigation record located for PC-819. Names era-standard applications, not confirmed installed materials. No quantity, no manufacturer attribution. Diesel propulsion excludes boiler-room pathways but not exhaust/muffler lagging or construction materials.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (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 (1943) and U.S. service era (1943-48).
- 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 blocks automated fetch, HTTP 403, consistent with standing defect noted in BATCH-01 and BATCH-98) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-08
-
[10]EPA, Draft Final Portland Harbor RI/FS Remedial Investigation Report, Section 4 source-site tables (semspub EPA document 100004575, live fetch verified 2026-10-03) [other_primary]
- Locator
- EPA semspub 100004575, Section 4 tables - 'Former Albina Engine and Machine Works Shipyard' site entry and 1971/1975 incident rows
- Finding type
- environmental_record
- Finding
- The builder's yard is a documented Portland Harbor contamination source site: the EPA RI/FS Section 4 tables list the 'Former Albina Engine and Machine Works Shipyard' with a 20 November 2007 DEQ site summary, and the tables' incident entries record an 8 April 1971 slick reported at the shipyard and a 11 June 1975 DEQ observation of fugitive emissions from Albina sandblasting with uncontrolled material storage - DEQ instructed Albina to cease sandblasting operations by letter of 1 July 1975. Contaminants of interest identified for the site in the reviewed sections are PCBs, TPH, metals, PAHs, and VOCs; no asbestos-specific finding is attributed to the Albina site in the reviewed tables.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1971-2007 (site documentation)
- Population
- Albina yard workforce (context); Portland Harbor study populations
- Limitations
- Yard-level environmental record for the builder, not the hull: documents the construction site as a Portland Harbor source area with ship-repair discharge/sandblasting complaints; does NOT attribute asbestos contamination to the yard and says nothing about materials aboard PC-819 or any hull built there.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-09
-
[11]Batch-8190 search ledger (this record): NavSource; shipbuildinghistory Albina yard list; uboat.net; Coast Guard Aviation Association article; NAVPERS 15,790 awards manual (HyperWar); MARAD Vessel History Database; Naval Vessel Register; SEMAR guardacostas history; EPA Portland Harbor RI/FS; Oregon DEQ ECSI; GAO product page; CourtListener (paced/blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-819-pc819-01 through -14
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming PC-819 was found in the public sources searched. CAVEAT: CourtListener could not be queried to completion this session - the fleet-wide pacing limiter on the shared authenticated account returned 'budget momentarily spent' on repeated attempts; logged as blocked in search_ledger, not as a negative result. Secondary web sweeps surfaced no qualifying case; the only 'asbestos aboard' material is law-firm marketing content (mesotheliomalawyercenter.org, asbestos.com shipyard listicles) asserting exposure without primary sourcing - excluded by source policy.
- 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 (paced, not run). Deck logs (RG 24), builder work packages, the June 1948 Maritime Commission custody file, and the 1952 Mexican transfer file are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-819-pc819-10