Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
-
[1]DANFS, 'SC-501 - SC-600' compilation - SC-534 entry (live NHHC page, verified 2026-10-03) [nhhc_danfs]
- Locator
- DANFS SC-501 - SC-600 page, SC-534 paragraph
- Finding type
- vessel_history
- Finding
- DANFS records for this hull, verbatim: 'Built at Luders Marine Const. Co., Stamford, Conn. Keel laid 5/23/41. Launched 4/27/42. Commissioned 7/11/42. Transferred to France 10/28/44.' The entry is a one-line milestone record with no service narrative - it does not carry the PC-534 commissioning designation, the April 1943 reclassification, the Anzio damage, or any French-service detail.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1944
- Population
- Luders yard construction trades (1941-42); crew (1942-44)
- Limitations
- Ship-specific milestones only; no asbestos or material content, no spec block, no service narrative. NavSource's page note 'There is no DANFS history available for SC-534' refers to the absence of a full narrative entry - this one-line compilation entry does exist and was verified live 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-01
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-534 (page verified live 2026-10-03) [other_primary]
- Locator
- NavSource 12/150534.htm header block, specifications block, photo-caption table
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 23 May 1941 by the Luders Marine Construction Co., Stamford, CT; launched 27 April 1942; commissioned USS PC-534 on 11 July 1942; reclassified SC-534 in April 1943; damaged 27 and 28 January 1944 by near-miss of bomb off Anzio, Italy; transferred to France 28 October 1944 and reclassified CH-122; 'Fate unknown.' Specifications: 148 t.; 110'10" x 17' x 6'6"; 15.6 kts.; complement 28; armament one 40mm mount, two .50 cal. machine guns, two depth charge projector 'Y Guns,' two depth charge tracks; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Call sign NBAR (Nan-Baker-Able-Roger). Page also references Library of Congress photographs of this hull at Luders, c. March 1942 (negatives 8b04223r, 8b04224r, 1a35047v).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1944
- Population
- Luders yard construction trades (1941-42); crew (1942-44)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates track DANFS where DANFS covers them, and the commissioning designation (PC-534), reclassification month, call sign, and spec block come from this source alone among those searched. 'Fate unknown' is superseded by French-service compilations (ev-05, ev-06). Its 'no DANFS history' note is stale - the one-line DANFS entry exists (ev-01). Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-02
-
[3]Robert J. Cressman, The Official Chronology of the U.S. Navy in World War II (NHHC publication), Chapter VI: 1944 - HyperWar/ibiblio verbatim transcription (verified live 2026-10-03) [other_primary]
- Locator
- USN-Chron-1944.html, January entries for 27 and 28 January 1944 (Mediterranean paragraphs)
- Finding type
- historical_record
- Finding
- The official Navy chronology records this hull damaged by enemy air action off Anzio on two consecutive days: 27 January 1944 - 'German air opposition to landings at Anzio begins to increase; submarine chaser SC-534 is damaged by near-miss of bomb. Adverse weather conditions there cause damage to one large infantry landing craft (LCI[L]) and eleven tank landing craft (LCT)'; and 28 January 1944 - 'Off Anzio, motor torpedo boat PT-201 - that has Lieutenant General Mark Clark, Commanding General of the U.S. Fifth Army, on board - is damaged by friendly fire from minesweeper Sway (AM-120); submarine chaser SC-534 is damaged by near-miss of bomb.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-01-27 to 1944-01-28
- Population
- Crew aboard, Anzio operating area (Jan 1944)
- Limitations
- Documents the two near-miss damage events and this hull's presence in the Anzio support force - it does not describe the extent of damage, casualties, repairs, or her operations before or after. No asbestos content. ibiblio/HyperWar is the standard verbatim-transcription mirror for the NHHC-published chronology; the canonical NHHC chapter URL could not be located this session (history.navy.mil chronology index returned 404).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-03
-
[4]NavSource Online: 110' Submarine Chaser photo index - class introduction and SC-497-class roster (verified live 2026-10-03) [other_primary]
- Locator
- NavSource 12/01idx.htm class introduction paragraph and SC-497-class roster rows
- Finding type
- vessel_history
- Finding
- CORRECTION / designation-chain support: the class index explains the PC-534 -> SC-534 reclassification as class-wide, not hull-unique - 'World War II expansion programs led to construction of two large groups of subchasers, the new 110-foot wooden-hulled craft and the 173-foot steel-hulled type. By 1943, it was felt desirable to differentiate between the two types. The type symbol PC was retained for the steel 173-footers, and the separate symbol SC was adopted for the 110-foot vessels. These now dropped the dual "S.C.-PC" identification, and were simply identified as "USS SC-."' The roster lists 'SC-534 ex-PC-534' alongside the same ex-PC pattern for every early class boat (SC-497 ex-PC-497 through the block). This hull was therefore never a PC-461-class steel patrol craft: PC-534 was the shared-series number carried by a wooden 110' boat until the April 1943 re-symboling.
- Verification
- verified
- Role
- correction
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1943
- Limitations
- Corrects the batch-scope risk of reading 'PC-534' as a PC-461-class vessel - it is a designation-history fact, not a material claim. The 1943 dual-to-SC re-symboling is stated at class level; this hull's specific April 1943 reclassification month rests on the vessel page (ev-02). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-04
-
[5]Shipbuilding History (Tim Colton), Luders Marine yard construction table, Stamford CT; corroborated by the site's WWII sub-chaser production table at shipbuildinghistory.com/smallships/pc2.htm (both verified live 2026-10-03) [other_primary]
- Locator
- Luders yard table, SC 534 row; smallships/pc2.htm SC 534 row; Luders yard-history header
- Finding type
- vessel_history
- Finding
- The builder's-yard table records for this hull: 'SC 534 | US Navy | Sub Chaser | 136d | 110 | 11-Jul-42 | To France 1944 as Ch. 122, later P 709, Q 441, condemned 1968' - corroborating the 11 July 1942 delivery/commissioning date and extending the record past NavSource's 'fate unknown': French designations P 709 and Q 441, condemned 1968. The companion production table lists 'SC | 534 | Luders Marine | Stamford CT | 148 | 110 | 11-Jul-42 | To Free French 1944 as CH 122.' The yard page documents Luders Marine Construction as founded by Alfred E. Luders in 1908 at Byram CT, moved to Stamford Harbor in 1912, closed 1968.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1968
- Population
- French Navy crew (1944-68); French disposal workforce (1968)
- Limitations
- Shipbuildinghistory is a long-running secondary reference compilation (yard records and delivery tables), not an official registry - the P 709/Q 441 designation sequence and 'condemned 1968' differ in detail from the French philately compilation (ev-06: CH-709 -> P-709, desarme 25 Sep 1968); carried as convergent-on-1968 disposal. 'Free French' vs 'France' wording varies between the site's two tables; the October 1944 transfer post-dates the FNFL's absorption into the reconstituted French Navy. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-05
-
[6]Poste Navale Militaire (French naval philately/history compilation), '* CHASSEUR CH 122 (1944/1968)' vessel record (verified live 2026-10-03) [other_primary]
- Locator
- postenavalemilitaire.com thread t5833, 'CHASSEUR CH 122 (1944/1968)' record block
- Finding type
- vessel_history
- Finding
- French-service record for this hull: 'Chasseur de Sous-marins de l'U.S Navy SC-534, transfere a la Royale en octobre 1944. Il prend le nom de CH 709 puis de P 709 lorsqu'il devient Patrouilleur' - in service 28 October 1944; disarmed (desarme) 25 September 1968; French-service armament listed as one 40mm gun and three 20mm guns; complement 28; hull symbols CH122, CH709, P709. The page carries a dated photograph caption 22 May 1947 documenting the boat in postwar French service.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-1968
- Population
- French Navy crew (1944-68)
- Limitations
- A specialized secondary compilation (naval-philately reference), not an official Marine nationale archive record - the SHD Vincennes file for this hull is the open primary lead. Designation sequence conflicts with shipbuildinghistory (CH-709 -> P-709 here vs P-709 -> Q-441 there) - both may be partially right at different times; carried as a gap. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-06
-
[7]Era inference built on: NARA-authored Unwritten Record blog (wooden 110' SC put into production for WWII); NavSource spec block (GM 8-268A diesels, no steam plant); class-article construction data (438 boats, 1941-44); GAO HRD-80-2 Navy asbestos-era documentation (ev-09) [other_primary]
- Locator
- NARA Unwritten Record 'Spotlight: Submarine Chasers' (26 Apr 2016); NavSource specifications block; shipyards.json (no Luders entry)
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered 110' submarine chaser built 1941-42 sits inside the Navy's documented asbestos-use era but at the low end of its material intensity: no boilers, no steam lines, no turbine lagging - the dominant shipboard asbestos pathways do not exist on this hull type. Era-standard diesel-craft applications aboard a boat of this type and period were engine and exhaust lagging, machinery gaskets, valve packing, and electrical/wiring insulation in a small wooden hull volume.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1968
- Population
- Luders yard construction trades (1941-42); crew (1942-44 US, 1944-68 French); disposal workforce (1968)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-534. Names era-standard applications, not confirmed installed materials; no quantity. The wooden-hull type plausibly carried materially less asbestos than steel steam vessels of the same era - an inference about degree, not an exemption claim. No manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-07
-
[8]National Archives, The Unwritten Record (NARA staff blog), 'Spotlight: Submarine Chasers' (26 April 2016) - RG 19 engineering-record context for the 110' chaser type (verified live 2026-10-03) [other_primary]
- Locator
- unwritten-record.blogs.archives.gov post, RG 19 drawing links (NAID 28264940, 30010079)
- Finding type
- historical_record
- Finding
- NARA-authored record on the type: '440 of these wooden SC boats were constructed and placed in service during the World War I era. The design proved very effective, and an improved wooden 110' SC was put into production for World War II' - confirming the wooden-hull construction of this hull's class from a government archival source, and pointing to RG 19 Alphabetical Series of Ship Engineering Drawings holdings for the 110' chaser type (NAID 28264940 outboard profile; NAID 30010079).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1944 (WWII production statement)
- Limitations
- Confirms the class's wooden construction - a material-context fact relevant to how much asbestos the type could plausibly carry - but contains no asbestos content and documents the WWI predecessor design directly; the WWII production statement is at type level. The linked NARA catalog records are JS-rendered and could not be independently fetched this session (see search ledger).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-08
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) - product-page highlights (firecrawl-rendered, verified 2026-10-03) [gao]
- Locator
- GAO product page HRD-80-2 highlights block (plain curl 403; firecrawl-rendered; 26-page PDF not retrieved)
- Finding type
- gov_survey
- Finding
- GAO's review of Navy asbestos-exposure protection documented that asbestos insulation was in use in Navy ships, and that the Navy's 1975 policy was to remove and replace with nonasbestos materials only insulation that was damaged or had to be removed for repairs - a policy modified in 1979 to selective replacement in high-maintenance areas. The program-level finding places asbestos insulation aboard Navy ships throughout this hull's U.S. service era (1942-44) and well after.
- 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. Content via product-page highlights - gao.gov returns HTTP 403 to plain curl but renders under firecrawl; the 26-page full-report PDF was not retrieved. Fieldwork shipyards were Long Beach and Norfolk - not this hull's builder.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-09
-
[10]Batch-7909 search ledger (this record): DANFS compilation; NavSource vessel + class index; Cressman chronology; shipbuildinghistory yard + production tables; French philately compilation; uboat.net corroboration; NARA blog; GAO product page; NVR check; LOC photo lead; NARA catalog; CourtListener (API v4); secondary web litigation/yard sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-534-01 through -15
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS SC-534 / PC-534 / CH-122 was found in the public sources searched. CourtListener 'SC-534' opinion search returned 16 results - all name collisions (state reporter citations containing 'S.C. 534'/'SC-534' strings, e.g., Georgia, Kentucky, Missouri appellate reports; none referencing the vessel). CAVEAT: the 'SC-534' docket query and both 'SC 534' variant queries could not be run this session - the fleet-wide CourtListener pacing budget stayed saturated through ~55 minutes of spaced retries (helper stand-down guidance obeyed); logged 'blocked' in search_ledger, not as negative results. Secondary web sweeps surfaced no qualifying case; the only 'asbestos' material is law-firm marketing content (asbestos-site lists naming Luders Marine Construction, sokolovelaw.com, mesothelioma.com, swmwlaw.com and similar) - excluded by source policy, no primary anchor located.
- 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 - a 110' wooden diesel boat simply has few asbestos-relevant systems and generated few paper records; no survey would be expected for a hull this small transferred in 1944. The litigation search is genuinely open on the docket side and the 'SC 534' string variant (pacing-blocked, not run). RG 24 deck logs (1942-44), any BuShips war-damage report on the January 1944 near-misses, and the SHD Vincennes French-service file are undigitized/open leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-10
-
[11]Library of Congress photographs of SC-534 at Luders Marine, Stamford CT, c. March 1942 - FSA/OWI negative numbers 8b04223r, 8b04224r (via Joe Radigan) and 1a35047v (via Bill Gonyo), per NavSource photo captions [other_primary]
- Locator
- NavSource 12/150534.htm photo-caption table; loc.gov item fetch attempts (403/404 this session)
- Finding type
- historical_record
- Finding
- NavSource captions document three Library of Congress-held photographs of this hull under construction at the Luders yard c. March 1942 - a month before her 27 April 1942 launch. These are construction-era images: direct visual documentation of the build state of this hull (framing, fit-out, yard workforce) immediately before launch.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-03
- Population
- Luders yard construction trades (March 1942)
- Limitations
- Archival lead only: the cited LOC negative numbers (8b04223r, 8b04224r, 1a35047v) could not be surfaced in loc.gov catalog search this session - the FSA/OWI collection's online cataloging is item-inconsistent, and loc.gov returned 403 to direct item fetch attempts; captions transcribed via NavSource. Photographs document construction, not materials - no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-534-11