Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 908-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-570-pc570-pkt-908-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-570 page (build/milestone timeline, specifications, Thai transfer; notes no DANFS history exists for this hull) [other_primary]
- Locator
- NavSource 12/010570 page header timeline and specifications block
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 11 September 1941 by the Albina Engine and Machinery Works, Portland, OR; launched 5 January 1942; commissioned USS PC-570, 18 April 1942; decommissioned January 1947 at Astoria, Oregon and laid up in the Pacific Reserve Fleet, Columbia River Group; transferred June 1953 to Thailand and named HTMS Longlom (PC 8); page prints Thai decommissioning '2 February 1994' and lists fate unknown. Specifications: 295 t. light / 450 t. full load; 173'8" length; 23' beam; 10'10" draft; 20.2 kts; complement 65; armament one 3"/50 DP mount, one 40mm, three 20mm, two Mk20 Mousetrap rocket launchers, four depth charge projectors, two Mk32 Mod 3 single ASW torpedo tubes, two depth charge tracks; propulsion two 1,440 bhp Fairbanks Morse 38D8-1/8 diesels (serial nos. 832225, 832226), Westinghouse single reduction gear, two shafts. Page explicitly notes: 'There is no DANFS history available for PC-570.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1984 (NavSource page prints Thai decommissioning 1994 - see ev-09 conflict)
- Population
- Albina construction trades 1941-42; wartime and postwar crew (complement 65); Royal Thai Navy crew 1953-1984
- Limitations
- NavSource is a compiled secondary archive, not a government record; it documents milestones and specifications, not materials or asbestos content. Its '2 February 1994' Thai decommissioning date conflicts with the Thai-language museum source (2 February 2527 BE = 1984) and navypedia ('stricken 2.1984') - carried as a documented conflict, not reconciled. No U.S. striking date is given.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-01
-
[3]uboat.net, Allied Warships of WWII: USS PC-570 (PC-570) page + commander records (compiled from patrol reports and war diaries) [other_primary]
- Locator
- uboat.net ship page 'Notable events' section and linked commander pages (McBride; Cocroft; Medbery)
- Finding type
- vessel_history
- Finding
- Compiled wartime record for this hull: ordered 1 April 1941; commanding officers Lt. Paul H. McBride, USNR (18 April 1942 - late 1942), Lt. A. W. Cocroft, USNR (early 1944), Lt. A. F. Medbery, USNR (December 1944). Documented operations: escorted USS Searaven (SS-196) departing Pearl Harbor for her tenth war patrol 17 January 1944; escorted USS Skate (SS-305) departing Pearl Harbor for her third war patrol 5 February 1944; sent from Midway 18 December 1944 to escort the damaged USS Dragonet (SS-293) - rendezvous failed, Dragonet reached Midway escorted by armed yacht USS Beryl.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1944
- Population
- Wartime crew (complement ~65)
- Limitations
- Secondary compiled database (uboat.net) drawing on patrol reports; documents Pearl Harbor-area submarine-escort and Midway operations in 1944 but leaves 1942-43 service undocumented in located sources. Contains no materials or asbestos information. CO sequence is partial (gaps between named officers).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-02
-
[4]Aubrey Alfred Bowman collection (contributed by Belinda Bowman Bradley), USS PC-570 - scanned Thanksgiving menu (26 November 1942) and Christmas menu (25 December 1942), NavSource image nos. 1201057004-1201057007 [other_primary]
- Locator
- NavSource 12/010570, Bowman collection photo section, images 1201057004-1201057007
- Finding type
- historical_record
- Finding
- Scanned ship's holiday menus (primary artifacts) for this hull: officers listed are Lieut. Paul H. McBride, Commanding Officer; Lieut. (j.g.) E. C. Patterson, Jr., Executive Officer; Ensign V. W. Stallcup, Engineering Officer; Ensign R. L. Newsome, Gunnery Officer; Ensign A. H. Parker, First Lieutenant - with approximately 58 enlisted personnel named (including the collection donor, Bowman). Corroborates McBride's command and an essentially full complement aboard in late 1942.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-11-26; 1942-12-25
- Population
- Ship's company late 1942 (~63 personnel listed)
- Limitations
- Primary artifacts hosted on a secondary archive. The menus do not print the ship's location on either date and contain no materials/asbestos information; the enlisted count (~58) approximates the stated complement of 65. Not an official record.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-03
-
[5]SeaFarer (Thai-language naval museum project), 'เรือหลวงล่องลม(ลำที่ 1)' [HTMS Longlom (I)] - Royal Thai Navy service record for ex-PC-570 + navypedia.org Khamronsin-class table (cross-check) [other_primary]
- Locator
- thaiseafarer.com/naval-museum/pc461-8/ specification block; navypedia.org/ships/thailand/th_es_khamronsin.htm
- Finding type
- vessel_history
- Finding
- Royal Thai Navy service record for this hull: ex-PC-570 received under the post-WWII U.S. military assistance program (Thai war-surplus loan-purchase scheme); eighth of eight PC-461-class patrol craft delivered to the RTN in three tranches (Sarasin, Thayanchon, Khamronsin; Phali, Sukiep; Tongpliu, Liulom, Longlom); RTN pennant number 8; commissioned into Thai service 5 June 2496 BE (5 June 1953); decommissioned 2 February 2527 BE (2 February 1984). Thai-service armament later reduced on conversion to gun-patrol duties (3"/50, 40mm, GAM-BO, 20mm listed). Navypedia independently reads 'stricken 2.1984'.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1953-1984
- Population
- Royal Thai Navy crew 1953-1984
- Limitations
- Enthusiast-run Thai-language museum site citing navsource, uboat.net, thaifighterclub, wings-aviation - secondary, not an official RTN source; used because it prints the Buddhist-Era dates that resolve NavSource's '1994' as a probable 1984 conversion slip. Contains no materials or asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-04
-
[6]K.M. (widow of J.M.) v. Lockheed Shipbuilding; Albina Engine and Machine; Willamette Iron and Steel; Director, OWCP - BRB No. 08-0403, Decision and Order issued 2008-12-30, U.S. Department of Labor Benefits Review Board (McAllister Longshore Act series: McAllister I, 39 BRBS 35 (2005); McAllister II, 41 BRBS 28 (2007)) [court_record]
- Locator
- BRB No. 08-0403 (12/30/2008), decision text pp.1-6 (facts of exposure history, last-responsible-employer holding)
- Finding type
- litigation_documented
- Finding
- Adjudicated asbestos-exposure litigation at this hull's builder yard: a shipyard carpenter worked at three Portland-area yards 1956-1960 including Albina Engine and Machine; he died 22 September 2002 of left pleural mesothelioma. The ALJ found 'clear, credible, and unrebutted evidence' of asbestos exposure at Albina and held Albina Engine the last responsible employer; the Benefits Review Board affirmed on second remand.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1956-1960 (exposure); 2002 (death); 2005-2008 (adjudication)
- Population
- Albina Engine shipyard trades 1956-1960 (decision window); decedent carpenter J.M./McAllister
- Limitations
- Builder-yard-level record, not hull evidence: the exposure window (1956-1960) post-dates this hull's 1941-42 construction at Albina by fourteen years and does not name the vessel. Establishes that asbestos exposure was adjudicated at the constructing yard in the postwar repair era - context for the yard, not proof about materials aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-05
-
[7]NavSource PC-570 specifications block (diesel propulsion, no steam plant) + PC-461 class design context [other_primary]
- Locator
- NavSource specifications block; class design context per ev-01/ev-02
- Finding type
- asbestos_application
- Finding
- Era/class inference: a steel-hulled PC-461-class submarine chaser built 1941-42 with twin Fairbanks Morse diesel engines (no boilers or steam turbines) would have carried period-standard asbestos-containing materials in the applications typical of Navy construction of the era - machinery and diesel-exhaust lagging, pipe and flange gaskets, valve packing, electrical insulation, and deck coverings. The diesel plant excludes the boiler/turbine lagging pathway that dominates asbestos records on steam vessels.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1984
- Population
- Albina construction trades 1941-42; crew 1942-47; RTN crew 1953-84
- Limitations
- Class/era inference only - no ship-specific document confirms any asbestos product aboard this hull. Does not establish quantity, specific products, or present-day presence (hull fate after 1984 Thai decommissioning is unknown).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-06
-
[8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (October 18, 1979) [gao]
- Locator
- GAO HRD-80-2 product page (abstract)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation aboard ships and in shipyard work through the early 1970s, and described Navy programs to identify and protect workers from asbestos exposure - program-level context covering the era in which this hull was built and served.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 (report); WWII-1970s (covered era)
- Population
- Navy shipyard workers and crews, era-wide
- Limitations
- Program-level report: does not name this hull or its class, does not inventory any vessel, and does not establish exposure aboard PC-570. gao.gov blocks automated fetches (HTTP 403); product-page description relied upon - standing access limitation also noted in BATCH-01.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-07
-
[9]Batch-7945 search ledger (this record): NHHC/DANFS (no entry exists for PC-570); Naval Vessel Register (pre-1987 disposals excluded); NavSource; uboat.net; thaiseafarer.com; navypedia.org; DOL Benefits Review Board published decisions; GAO product page; NARA catalog; CourtListener (see ledger) [other_primary]
- Locator
- search_ledger rows sl-uss-pc-570-pc570-01 through sl-uss-pc-570-pc570-10
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, museum/Thai-Navy hazmat disclosure, or docketed case naming PC-570 or HTMS Longlom was found in the public sources searched (see search_ledger). The hull has no DANFS entry and no NVR detail page.
- 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 - it establishes only that no ship-specific documentation was found in the sources searched. Deck logs and builder records in NARA RG 24/RG 19 remain unsearched archival leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-08
-
[10]Cross-source date reconciliation: thaiseafarer.com (Buddhist-Era dates) + navypedia.org vs NavSource page text [other_primary]
- Locator
- thaiseafarer.com spec block (2 ก.พ. 2527); navypedia th_es_khamronsin.htm; navsource.net 12/010570 header
- Finding type
- historical_record
- Finding
- Thai-service decommissioning date conflict documented: NavSource prints 'Decommissioned 2 February 1994' for HTMS Longlom (PC 8); the Thai-language museum source prints 2 February 2527 BE (= 2 February 1984 CE) and navypedia reads 'stricken 2.1984'. The 1984 reading is supported by two independent sources and is consistent with the Buddhist-Era original; NavSource's '1994' is assessed a probable era-conversion or transcription slip. The 1984 date is carried in the record fields with the conflict disclosed here and in gaps.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1984/1994
- Limitations
- All three sources are secondary compilations; no official RTN record was located. The correction is documented rather than silently applied - NavSource's reading remains visible in the record's own fields.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-09
-
[11]Oregon Historical Society Digital Collections, Albina Engine & Machine Works wartime photograph series (e.g., 'Medical personnel treating worker at Albina Engine & Machine Works, Portland' and 'Employee at door of safety engineers office'; negative-sleeve note 'Albina shipbuilding / Sub chaser / 11/25/44') [museum_official]
- Locator
- OHS Digital Collections item records (negative notes 'Albina shipbuilding / Sub chaser / 11/25/44')
- Finding type
- historical_record
- Finding
- The Oregon Historical Society holds a wartime photograph series of the Albina Engine & Machine Works yard — the builder of this hull — with negative-sleeve notes dating sub-chaser construction photography to 1944 (including medical/first-aid and safety-engineer subjects). The series documents the yard's wartime subchaser production and working conditions; it is an archival lead for builder-yard material and practice documentation.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1944 (photographs); 1941-42 (this hull's construction at the same yard)
- Population
- Albina Engine & Machine Works wartime workforce
- Limitations
- Yard-level archive: the dated photographs (25 November 1944) post-date this hull's construction window (1941-42) and do not depict PC-570 itself; the sub-chaser subject identification is an unconfirmed negative-sleeve note per OHS. No materials or asbestos content. Value is as a lead into the OHS Albina collection for build-era documentation.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-570-pc570-10