Evidence
14 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-14).
-
[1]research packet 936-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-768-pc768-pkt-936-packet-md
-
[2]DANFS, 'SC-701 - SC-800' compilation - SC-768 entry (live NHHC page, verified 2026-10-03) [nhhc_danfs]
- Locator
- DANFS SC-701 - SC-800 page, SC-768 paragraph
- Finding type
- vessel_history
- Finding
- DANFS records for this hull, verbatim: 'Built at Seabrook Yacht Corp., Seabrook, Tex. Keel laid 4/8/42. Launched 8/8/42. Commissioned 11/10/42. Transferred to Foreign Liquidation Commission 4/30/48.' The entry is a one-line milestone record with no service narrative - it does not carry the PC-768 commissioning designation, the April 1943 reclassification, the February 1946 striking, or any post-transfer detail.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Seabrook yard construction trades (1942); crew (1942-46)
- 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-768' 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-pc-768-01
-
[3]NavSource Online: Submarine Chaser Photo Archive, SC-768 (page verified live 2026-10-03; canonical /archives/ path confirmed - a /arkiv/ mirror path also resolves in search results) [other_primary]
- Locator
- NavSource 12/150768.htm header block, specifications block
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 8 April 1942 by the Seabrook Yacht Corp., Seabrook, TX; launched 8 August 1942; commissioned USS PC-768 on 10 November 1942; reclassified SC-768 in April 1943; struck from the Naval Register 25 February 1946; transferred to the State Department, Foreign Liquidation Commission 30 April 1948; '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 'K Guns,' two depth charge tracks; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Call sign NXRG (Nan-Xray-Roger-George). No image of this hull is held in the archive.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Seabrook yard construction trades (1942); crew (1942-46)
- 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-768), reclassification month, striking date, call sign, and spec block come from this source alone among those searched. 'Fate unknown' stands - no post-transfer record located. 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-pc-768-02
-
[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 (SC-768 ex-PC-768)
- Finding type
- vessel_history
- Finding
- CORRECTION / designation-chain support: the class index explains the PC-768 -> SC-768 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-768 ex-PC-768' alongside the same ex-PC pattern for every early class boat. This hull was therefore never a PC-461-class steel patrol craft: PC-768 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-768' as a PC-461-class hull number - it is a designation-history fact, not a hull-type fact. 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-pc-768-03
-
[5]uboat.net Allied Warships, USS SC-768 (SC-768) vessel entry (verified live 2026-10-03) [other_primary]
- Locator
- uboat.net/allies/warships/ship/8985.html - milestone table
- Finding type
- vessel_history
- Finding
- uboat.net records this hull: SC-497-class submarine chaser, built by Seabrook Yacht Corp. (listed 'Houston, Texas'); ordered 14 February 1942; laid down 8 April 1942; launched 8 August 1942; commissioned 10 November 1942. No commands listed; no operational events or history entries - the entry is milestones only.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Seabrook yard construction trades (1942); crew (1942-46)
- Limitations
- uboat.net is a secondary compilation; its milestone dates track DANFS/NavSource. 'Ordered 14 Feb 1942' rests on this source alone - carried in gaps, not asserted. The 'Houston, Texas' builder location is the Seabrook yard's metro-area rendering, not a different yard. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-04
-
[6]Shipbuilding History (Tim Colton), Seabrook Yacht yard construction table, Seabrook TX; 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
- seabrook.htm yard table, SC 768 row; smallships/pc2.htm SC 768 row; yard-history header
- Finding type
- vessel_history
- Finding
- The builder's-yard table records for this hull: 'SC 768 | US Navy | Sub Chaser | 136 | 110 | 10-Nov-42 | To FLC 1948' - corroborating the 10 November 1942 delivery/commissioning date and the Foreign Liquidation Commission disposal. The companion production table lists 'SC | 768 | Seabrook Yacht | Seabrook TX | 148 | 110 | 10-Nov-42 | To FLC 1948.' The yard page documents Seabrook Yacht Corporation as started by Albert and Ernest Fay in 1938, primarily a repair facility that continued as a boatbuilder after its wartime experience, located at the southwest end of Jennings (Snake) Island, Seabrook TX. The same table lists her Seabrook-built sisters' deliveries and disposals: SC 769 (5-Dec-42, 'To the Philippines 1948'), SC 770 (31-Dec-42, 'To Free French 1944 as CH 141'), SC 771 (25-Jan-43, 'To Free French 1944 as CH 124').
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Seabrook yard construction trades (1942); FLC disposal workforce (1948)
- Limitations
- Shipbuildinghistory is a long-running secondary reference compilation (yard records and delivery tables), not an official registry - consistent here with DANFS on the FLC disposal. Yard-table displacement (136) differs from the production table and NavSource spec block (148) - a tonnage-convention variance carried in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-05
-
[7]NARA Special List 44 (by ship number), 'List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947' - SC-768 row (PDF verified live; layout-extracted this session) [other_primary]
- Locator
- sl-44-ship-number.pdf, SC hull-number sequence, SC-768 row (begin 11/10/1942, end 7/31/1945)
- Finding type
- historical_record
- Finding
- NARA's Special List 44 ship-number index records deck logs held for SC-768 covering 11/10/1942 - 7/31/1945 (RG 24, Entry 118, NAID 581208 series) - the log series begins on her commissioning date and runs through the end of her war service, corroborating the commissioned-service window against an official archival finding aid.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-11-10 to 1945-07-31
- Population
- Crew (1942-45)
- Limitations
- Finding-aid level: documents that logs for this hull exist in RG 24 for 10 November 1942 - 31 July 1945; the logs themselves are undigitized at NARA College Park and were not read - contents (locations, operations, material notes) unknown. Post-July-1945 logs (through the Feb 1946 striking) are outside the listed coverage. These are log-coverage dates, not inferred commissioning/decommissioning dates. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-06
-
[8]Naval Cover Museum wiki, SC 768 page - designation history and postmark record (verified live 2026-10-03) [other_primary]
- Locator
- navalcovermuseum.org/wiki/SC_768 - postmarks table (USPO Machine Cancel Miami FL, 1944-03-01) and designation history block
- Finding type
- historical_record
- Finding
- The Naval Cover Museum holds a postmark artifact for this hull: a USPO machine cancel, Miami FL, dated 1 March 1944, on a cover associated with SC-768 (Tom Kean collection, GregCiesielski scan) - placing the boat in the Miami postal orbit in March 1944, consistent with a stateside/Gulf-of-Mexico operating profile. The page's designation history matches NavSource: PC-768 commissioned 10 November 1942, reclassified SC-768 April 1943, 'Decommissioned (unk),' struck 25 February 1946, transferred to the State Department Foreign Liquidation Commission 30 April 1948, fate unknown.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1944-03-01
- Population
- Crew aboard (March 1944, Miami postal orbit)
- Limitations
- Archival lead only: a single cover artifact documents postal use from Miami on 1 March 1944 - it does not establish homeport, operating area, or duration of any Miami presence, and museum postmark dating covers only covers held in the collection. A philatelic wiki compilation, not an official archive. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-07
-
[9]U.S. Naval Activities, World War II, by State: Texas (Navy publication, HyperWar/ibiblio verbatim transcription - verified live 2026-10-03) [other_primary]
- Locator
- USN-Act/TX.html, Seabrook Texas entry (line: Assistant Supervisor of Shipbuilding, Seabrook Yacht Corp)
- Finding type
- historical_record
- Finding
- The Navy's wartime activities directory for Texas records under the Seabrook, Texas heading: 'Assistant Supervisor of Shipbuilding, Seabrook Yacht Corp, Seabrook, Tex.' - documenting an official Navy shipbuilding-supervision presence at this hull's builder yard during the wartime construction period.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- Navy shipbuilding-supervision staff and Seabrook yard trades (1942-45)
- Limitations
- Yard-level context: documents naval oversight of wartime construction at Seabrook Yacht Corp generally; it does not name this hull and contains no material or asbestos content. ibiblio/HyperWar is the standard verbatim-transcription mirror for the NHHC-published directory.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-08
-
[10]World War II U.S. Navy ship campaign-participation table (transcription of the CNO-approved NAVPERS 15,790 awards list), SC 692-SC 1004 page; corroborated by HyperWar 'Ships of the U.S. Navy 1940-1945' SC table and absence from the Cressman official chronology index hits (verified live 2026-10-03) [other_primary]
- Locator
- officialmilitaryribbons.com 'USS SC-692 to SC-1004' page (no SC 768 row amid SC 770/771/773 rows); ibiblio.org/hyperwar/USN/ships/ships-sc.html generic row; site-scoped Cressman search (no hits)
- Finding type
- historical_record
- Finding
- No WWII operation or engagement credit is recorded for this hull in the campaign-participation transcription: the SC 692-1004 table lists credited operations for neighboring hulls (SC 770, SC 771, SC 773 and others) but carries no SC-768 row. The HyperWar 'Ships of the U.S. Navy' table carries only the generic class row 'SC-768-769 | 1942-44' with no hull-specific annotation, and a site-scoped search of the official Cressman chronology transcription surfaces no SC-768 mention. Consistent with a stateside/non-combat service profile - but not proof of it.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945
- Population
- Crew aboard (1942-46)
- Limitations
- Absence evidence resting on a vendor-site transcription of the official NAVPERS 15,790 list plus a generic HyperWar row and a negative site-search - the underlying official document was not independently verified this session, and absence from a campaign list does not prove where the boat served (unlisted routine/convoy/training service is normal for the type). Carried 'partial.' No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-09
-
[11]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-pc-768-10
-
[12]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); PCSA class program data (438 delivered); GAO HRD-80-2 Navy asbestos-era documentation (ev-12) [other_primary]
- Locator
- NARA Unwritten Record 'Spotlight: Submarine Chasers' (26 Apr 2016); NavSource specifications block; shipyards.json (no Seabrook Yacht entry)
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered 110' submarine chaser built 1942 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
- 1942-unknown
- Population
- Seabrook yard construction trades (1942); crew (1942-46 US); FLC disposal workforce (1948)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-768/PC-768. 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-pc-768-11
-
[13]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 (1942-46).
- 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-pc-768-12
-
[14]Batch-8141 search ledger (this record): DANFS compilation; NavSource vessel + class index; uboat.net; shipbuildinghistory yard + production tables; NARA Special List 44; Naval Cover Museum; HyperWar USN-Act TX directory + ships-sc table; NAVPERS campaign transcription; NARA blog; GAO product page; NVR check; PCSA class page; CourtListener (API v4); secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-768-01 through -20
- 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-768 / PC-768 was found in the public sources searched. CourtListener 'PC-768' opinion search returned 2,468 results - all name collisions (professional-corporation 'P.C.' strings, statute-section and page references containing 'PC 768'/'PC-768'; zero vessel or asbestos references in the result set). See search_ledger for the per-repository outcomes including any CourtListener queries left fleet-pacing-blocked this session.
- 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 disposed of in 1948. RG 24 deck logs (1942-45), any BuShips completion/transfer files, and FLC disposal records are undigitized/open leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-768-13