Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 937-packet.md (3 sources cited) [museum_official]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-sc-771-sc771-pkt-937-packet-md
-
[2]DANFS collective entry, SC-701 - SC-800 (NHHC): SC-771 one-line entry [nhhc_danfs]
- Locator
- DANFS 'SC-701 - SC-800' page, SC-771 entry
- Finding type
- vessel_history
- Finding
- DANFS: 'SC-771 - Built at Seabrook Yacht Corp., Seabrook, Tex. Keel laid 8/18/42. Launched 11/5/42. Commissioned 1/25/43. Transferred to France 11/17/44.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1944
- Population
- Seabrook Yacht construction trades (1942-43); U.S. Navy crew (1943-44)
- Limitations
- Ship-specific construction and disposal milestones only; collective one-line entry carries no operational narrative, no PC-771 commissioning designation or April 1943 reclassification detail, no CH-124 designation, and no asbestos or material content. Live NHHC page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-01
-
[3]NavSource Online: Submarine Chaser Photo Archive, SC-771 (ex-PC-771) - construction, designation timeline, French transfer, specifications [other_primary]
- Locator
- NavSource 12/150771.htm header block, SC-497 Class specification block, timeline list
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: 'Laid down 18 August 1942 by the Seabrook Yacht Corp., Seabrook, TX; Launched 5 November 1942; Commissioned USS PC-771, 25 January 1943; Reclassified SC-771 in April 1943; Transferred to France 17 November 1944 and reclassified CH-124; Fate unknown.' Call sign Nan-Xray-Roger-Uncle; served the Navies of the United States and France. The sister Seabrook hull's page (SC-770, 12/150770.htm) spells the French CH-series designation out as 'Chasseur 141' - confirming CH-124 reads 'Chasseur 124' - and records SC-770 struck from the Marine Nationale inventory 23 November 1959, illustrating that French-side disposition records exist even though SC-771's own fate is undocumented. Spec block: displacement 148 t.; length 110'10"; beam 17'; draft 6'6"; speed 15.6 kts.; complement 28; armament one 40mm mount, two .50 cal. machine guns, two depth charge projector 'K Guns,' two depth charge tracks; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Page notes no image and no standalone DANFS history for this hull.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1944
- Population
- Seabrook Yacht construction trades (1942-43); U.S. Navy crew of 28 (1943-44); French Navy crew (1944-?)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates here concur with DANFS on every overlapping point (build, launch, commission, transfer). The commissioning designation (PC-771), reclassification month, CH-124 designation, and 'fate unknown' rest on NavSource plus NavalCoverMuseum agreement. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-02
-
[4]NavSource Submarine Chasers (SC) and (PC) index - type-wide April 1943 reclassification context and closed PC-461-class enumeration [other_primary]
- Locator
- NavSource 12/01idx.htm 'Submarine Chaser / 110' Wooden Hull' and '173' Steel Hull' index headers; PC-461 series enumeration
- Finding type
- historical_record
- Finding
- CORRECTION of the designation lineage: this hull is indexed under SC-771 but commissioned as USS PC-771 - which is NOT evidence of a PC-461-class steel 173-foot patrol craft. NavSource documents the type split: '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.' The steel PC-461 class was built in four closed numerical series - PC-461 to PC-496, PC-542 to PC-627, PC-776 to PC-826, PC-1077 to PC-1265 - which never included the number 771. This hull was a 110-foot wooden SC-497-class craft that genuinely commissioned under the PC-771 designation (25 Jan 1943, three months before the April 1943 split) - a wartime dual-numbering quirk, not a steel hull. Class context: 580 SC-497-class wood-hulled 110-foot submarine chasers were built during WWII; 142 went to Allies under Lend-Lease.
- Verification
- verified
- Role
- correction
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (reclassification era)
- Limitations
- Corrects a class-confusion risk (a 'PC-771' record could be mistaken for a PC-461-class steel patrol craft) and a designation lineage, not a material/asbestos claim. The class-split documentation is class-level; the PC-771 commissioning designation for this hull is ship-specific per NavSource and NavalCoverMuseum. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-03
-
[5]NavalCoverMuseum (Universal Ship Cancellation Society digital archive), SC 771 name-and-designation history page and 1943 cover [museum_official]
- Locator
- navalcovermuseum.org/wiki/SC_771 designation-history table; USS_SC-771_Covers_Page_1 single 1943-10-13 cover entry
- Finding type
- vessel_history
- Finding
- NavalCoverMuseum designation history for this hull: SC-497 Class Submarine Chaser; laid down August 18 1942, launched November 5 1942; commissioned as USS PC-771 January 25 1943; redesignated USS SC-771 April 1943 (decommissioned, date unknown); CH-124 in French Naval Service, transferred to France November 17 1944 and reclassified, fate unknown. The museum's single recorded cover (13 October 1943, Locy Type 2z, 'Official Business') is annotated 'Posted from another ship or station... Ship had no post office' - consistent with a 28-man small craft without an embarked post office.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1944
- Population
- U.S. Navy crew (1943-44); French Navy crew (1944-?)
- Limitations
- NavalCoverMuseum is a philatelic museum archive (USCS) - an official-museum source for designation/postal history, not a Navy registry; every overlapping milestone concurs with DANFS and NavSource. 'Decommissioned (date unknown)' and 'fate unknown' document the absence of a recorded decommissioning and disposition, not the events themselves. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-04
-
[6]NARA Special List #44, 'List of Logbooks of US Navy Ships, Stations, and Miscellaneous Units, 1801-1947' (by ship number) - SC-771 deck log coverage [other_primary]
- Locator
- NARA sl-44-ship-number.pdf, SC-771 line: 'SC-771 1/27/1943 11/17/1944'
- Finding type
- historical_record
- Finding
- NARA Special List #44 (ship-number ordering) documents textual deck logs for SC-771 covering 1/27/1943 through 11/17/1944 - two days after commissioning through the day of her French transfer, essentially her entire U.S. commission. These logs are the primary undigitized lead for her U.S. operational history (operating areas, availabilities, commanding officers), for which no public narrative was located.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1944
- Population
- U.S. Navy crew (log coverage period)
- Limitations
- Archival lead only: SL-44 establishes that the logs exist in NARA textual holdings (Archives II, College Park), not their content - SC-771 does not appear in NARA's online digitized deck-log index. No post-transfer (French) coverage, obviously, and no fitting-out log before 27 Jan 1943. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-05
-
[7]ShipbuildingHistory.com (Colton), Seabrook Yacht Corp. yard list, Seabrook TX - SC-771 build entry and yard profile [other_primary]
- Locator
- shipbuildinghistory.com/shipyards/yachtsmall/seabrook.htm - Seabrook Yacht yard table, SC 771 row
- Finding type
- vessel_history
- Finding
- The Colton yard list corroborates this hull's construction and disposition: 'SC 771 | US Navy | Sub Chaser | 136 | 110 | 25-Jan-43 | To Free French 1944 as CH 124' - matching DANFS/NavSource on builder, commission date, French transfer year, and CH designation. Yard profile: 'Seabrook Yacht Corporation was started by Albert and Ernest Fay in 1938. It was primarily a repair facility but continued as a boatbuilder after its wartime experience. The yard... was at the southwest end of Jennings (or Snake) Island' at Seabrook, TX. The same yard list shows sisters SC-768, SC-769, SC-770 and earlier SC-501/SC-502 built there; SC-770 also went 'To Free French 1944 as CH 141.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1944
- Population
- Seabrook Yacht construction trades (1942-43)
- Limitations
- Specialist secondary reference (compiled from Maritime Commission and yard records), not a primary registry - used as corroboration only; every overlapping fact it carries is also in DANFS or NavSource. Yard dates and location describe the builder, not any material aboard the hull. No asbestos content; no yard-level asbestos or hygiene record for Seabrook Yacht was located anywhere. uboat.net loosely gives builder location as 'Houston, Texas' - Seabrook is in Harris County in the Houston-Galveston Bay area; DANFS/NavSource/shipbuildinghistory all say Seabrook.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-06
-
[8]Era inference built on: NavSource SC-771 spec block (2 x GM 8-268A diesels, wooden 110-foot hull); NavSource SC-497-class index (580 wood-hulled 110-foot subchasers); GAO HRD-80-2 program context (see ev-08) [other_primary]
- Locator
- NavSource spec block; NavSource SC-497 class index; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A 110-foot wooden-hulled diesel subchaser built 1942-43 sits inside the Navy's documented heavy asbestos-use era, but the era inference for this hull type is materially narrower than for a steel steam combatant: with no boilers or turbines, the boiler/steam-line lagging pathway does not exist. Era-consistent applications aboard a diesel patrol craft of this period were engine-exhaust lagging, gaskets and valve packing, electrical insulation, and possible asbestos-cement (transite-type) board in machinery spaces. The confined 110-foot hull and 28-man crew bound any at-risk population at construction and in service.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1944
- Population
- Seabrook Yacht construction trades (1942-43); U.S. crew of 28 (1943-44); French crew (1944-?)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-771. Names era-standard applications, not confirmed installed materials; the wooden-hull/diesel configuration argues for a smaller asbestos footprint than steam vessels but does not document one. No quantity; no manufacturer attribution.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2, Highlights section
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's efforts to protect workers from asbestos exposure at the Long Beach and Norfolk Naval Shipyards, including the use of asbestos in Navy ships; the product-page highlights record 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, modified in 1979 to include selective replacement in high-maintenance areas - spanning this hull's construction era (1942-43) and entire U.S. service (1943-44).
- 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 or to small wooden diesel craft. Full 26-page PDF was not extracted this session - content via the product-page Highlights text (firecrawl-rendered; direct curl returns HTTP 403 - standing gao.gov block documented in Batch 01/98).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-08
-
[10]Batch-8144 search ledger (this record): DANFS collective entry; NavSource SC-771 page and SC/PC index; NavalCoverMuseum designation page and cover; NARA SL-44 PDF (full text extracted); shipbuildinghistory.com yard list; uboat.net build table; CourtListener (pending - fleet pace limiter); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-771-sc771-01 through -10
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum documentation, or verified litigation naming SC-771 / PC-771 / CH-124 was found in the public sources searched. Dedicated asbestos-named web sweeps ('SC-771 asbestos', 'PC-771'/'SC 771' asbestos) returned only document-number collisions (Maine Senate bill index, Pakistani and U.S. reporter cites, school-board packets, a USACE training document) - no asbestos content of any kind names this hull, not even the law-firm listicles that populate records for better-known vessels.
- 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 NARA deck logs (coverage 1/27/1943-11/17/1944) and any Seabrook Yacht construction records are undigitized leads. French-custody period (from 17 Nov 1944) is outside U.S. documentation entirely. Does not establish or defeat any claim of exposure or legal eligibility. CourtListener status: see search_ledger - base queries blocked against the fleet pace limiter (one opinion query completed but uncapturable for classification); litigation field open, not negative.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-771-sc771-09