Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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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-818-pc818-pkt-943-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-818 page (construction milestones, specifications, Adak photographs, 1948 disposal transfer) [other_primary]
- Locator
- NavSource PC-818 page, class block + specifications block + photo captions
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: laid down 4 March 1943 by the Albina Engine and Machinery Works, Portland, OR; launched 30 March 1943; commissioned 3 August 1943; transferred to the War Shipping Administration in June 1948; fate unknown. Specifications: 450 t., 173'8" x 23' x 10'10", 20.2 kts, complement 65; one 3"/50 DP, one 40mm, five 20mm, two rocket launchers, two depth charge tracks; two 1,440 bhp Hooven-Owen-Rentschler R-99DA diesels (serials 6999, 7000), Westinghouse single reduction gear, two shafts. Photographs place the ship at Adak, Alaska circa 1945. Page states 'There is no DANFS history available for PC-818.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Albina construction trades 1943; wartime crew (design complement 65)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track official records but carry no decommissioning or strike date for this hull. Contains no asbestos content. Disposal-agency naming ('War Shipping Administration' in June 1948, two years after WSA's abolition) is loose terminology for the postwar maritime disposal agency; the builder's table reads 'MARAD' - see gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-01
-
[3]DANFS, YP-151 (Robert J. Cressman, NHHC) - documents PC-818 escorting YP-151 into Kodiak, December 1945 [nhhc_danfs]
- Locator
- DANFS YP-151 entry, paragraph on the December 1945 Kodiak leg
- Finding type
- vessel_history
- Finding
- NHHC's DANFS entry for YP-151 names this hull in an operational event: routed from the Alaskan Sea Frontier to Seattle for disposal after hostilities, 'Escorted by the submarine chasers PC-794 and PC-818, YP-151 reached Kodiak on 4 December 1945.' Documents PC-818 on escort duty in Alaskan waters in late 1945, consistent with the NavSource Adak photographic record.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945
- Population
- Wartime crew
- Limitations
- The mention sits inside YP-151's DANFS entry - PC-818 has no dedicated DANFS history. Documents a service event, not materials or asbestos content. Live NHHC page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-02
-
[4]Ships of the U.S. Navy, 1940-45: Submarine Chasers (HyperWar transcription of the official Navy Department vessel list) + U.S. Navy Radio Call Sign Book (WWII), Section 18 (PC818 -> NYCN) [other_primary]
- Locator
- ships-sc.html PC-461 class table (PC-811-822 row); CallSigns-18.html submarine chaser section
- Finding type
- historical_record
- Finding
- The official-derived vessel list carries this hull in the 'PC-811-822' block of the PC-461 class, commissioned 1942-44, with no loss marker - she survived the war. The wartime call sign book lists PC818 -> NYCN, matching the call sign displayed on the NavSource record.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1945
- Population
- Wartime crew
- Limitations
- List-level documentation only - establishes class membership, commission window, survival through WWII, and call sign; no service detail, no materials or asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-03
-
[5]Shipbuilding History, Albina Engine & Machine Works yard list, Portland OR - hull 102, PC 818 [other_primary]
- Locator
- Albina yard table, row 102 (PC 818)
- Finding type
- vessel_history
- Finding
- The builder's yard list records hull 102 as 'PC 818, U.S. Navy, Sub Chaser, 284 [light displacement], 174 [ft], delivered 3-Aug-43, To MARAD 1948' - corroborating the builder identity, delivery/commissioning date, and 1948 disposal transfer recorded by NavSource.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Albina construction trades 1943
- Limitations
- Secondary yard-history compilation, not a primary contract record; its 'MARAD 1948' disposal naming is the functional postwar maritime agency and is consistent with NavSource's looser 'War Shipping Administration' wording. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-04
-
[6]uboat.net Allied Warships, USS PC-818 (PC-818) - order date, decommissioning date, wartime commanding officers [other_primary]
- Locator
- uboat.net ship page 8645, data block + 'Commands listed' table
- Finding type
- vessel_history
- Finding
- Secondary-source record for this hull: ordered 10 August 1942; laid down 4 March 1943; launched 30 March 1943; commissioned 3 August 1943 (all consistent with NavSource); decommissioned 8 May 1946. Wartime commanding officers listed: Lt. Dirk K. Barrett USNR (3 Aug 1943 - early 1944); D. E. Wilson USNR (early-mid 1944); R. M. Baker USNR (mid-late 1944); O. C. Carmichael, Jr. USNR (late 1944 - end of list).
- Verification
- unverified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1946
- Population
- Wartime crew
- Limitations
- Secondary research site - the order date, decommissioning date, and command roster have no official-source corroboration located (NavSource and NHHC carry none of them). Dates agreeing with NavSource are corroborated; the 8 May 1946 decommissioning and the officer roster are carried as secondary-only and flagged in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-05
-
[7]Albina Engine & Machine Works v. Director, OWCP (McAllister), 627 F.3d 1293 (9th Cir. 2010), No. 09-70592 [court_record]
- Locator
- Opinion, 627 F.3d 1293, Part I (Background) and Part III (substantial evidence analysis)
- Finding type
- litigation_documented
- Finding
- Published Ninth Circuit opinion documenting asbestos exposure at this hull's builder yard: James R. McAllister worked as a shipyard carpenter at Willamette Iron & Steel and then Albina in 1956, then at a Lockheed predecessor in Seattle 1957-1960; he died of mesothelioma in 2002. All parties stipulated that his death was due to asbestos exposure during his shipyard employment; the ALJ noted WISCO admitted exposure in its employ and found no preponderance of evidence showing absence of exposure at Albina, assigning liability to Albina, which the Benefits Review Board affirmed. The Ninth Circuit granted review and reversed on the legal allocation question - adopting a sequential last-employer analysis and holding Lockheed liable; it did not adjudicate an absence of asbestos exposure at Albina.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1956-1960 (exposure); 2004-2010 (litigation)
- Population
- Portland-area shipyard carpenters, 1956
- Limitations
- Yard-level evidence about the builder, not this hull: the opinion names the yard, not PC-818, and the stipulated exposure year (1956) postdates this hull's 1943 construction by 13 years. Disposition described exactly: exposure findings below were at the ALJ/BRB level; the appellate reversal rested on the legal last-employer allocation rule, not on a finding of no exposure at Albina.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-06
-
[8]Era inference built on: NavSource PC-461-class specifications (diesel propulsion, no steam plant); shipbuildinghistory Albina record (WWII patrol-craft builder); McAllister yard litigation (ev-06) [other_primary]
- Locator
- Composite inference across ev-01, ev-04, ev-06
- Finding type
- asbestos_application
- Finding
- Era inference: a steel-hulled diesel patrol craft built in 1943 at a yard later documented with stipulated asbestos exposure would have carried period-standard asbestos applications suited to its plant - engine exhaust and machinery lagging, gaskets, valve and machinery packing, electrical insulation, and thermal/accommodation insulation. Unlike steam-driven hulls, the PC-461 class carried no boilers or steam turbines, so boiler and steam-line lagging does not apply to this class.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1948
- Population
- Albina construction trades 1943; wartime crew
- Limitations
- Class/era and builder-yard inference only - no document names this hull's materials, insulation vendor, or quantities. The absence of a steam plant narrows but does not eliminate the inferred product set. Does not establish presence aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page, highlights section
- Finding type
- gov_survey
- Finding
- GAO documented the Navy's shipboard asbestos problem at program level: asbestos insulation was used extensively aboard Navy ships; the Navy's 1975 policy removed asbestos insulation only when damaged or needed for repairs, modified in 1979 to selective replacement in high-maintenance areas. Program-level corroboration that WWII-era naval construction - including 1943 patrol craft - was built in the asbestos-insulation era.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 review; WWII-era construction context
- Population
- Navy shipyard workers (program level)
- Limitations
- Program-level record: GAO's fieldwork covered Long Beach and Norfolk Naval Shipyards, not Portland private yards or this hull; it documents era policy and prevalence, not this vessel's materials or any individual exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-08
-
[10]Batch-8189 search ledger (this record): NavSource; NHHC DANFS (YP-151 entry + index); shipbuildinghistory Albina table; HyperWar official-document transcriptions; NVR live check; Oregon Historical Society digital collections (blocked); NARA catalog; CourtListener authenticated API v4; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-818-01 through sl-uss-pc-818-11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or qualifying litigation naming PC-818 was found in the public sources searched (see search_ledger). The hull left federal custody in 1948 - before asbestos litigation and abatement recordkeeping existed - and its post-disposal fate is unknown, which forecloses most modern record types.
- 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. The hull's unknown post-1948 disposition means no museum file, donation condition, or demolition record can be expected; does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-818-09