Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
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[1]research packet 922-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: MISMATCH
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Evidence ID
- uss-sc-669-sc669-pkt-922-packet-md
-
[2]Ships' Data, U.S. Naval Vessels, Vol. II (NAVSHIPS 250-011, Bureau of Ships, Navy Department, 15 April 1945), Patrol Vessels - Submarine Chasers section; faithful scan hosted by shipscribe.com [other_primary]
- Locator
- SDB1945v2.pdf, SC class spec block p. 60-61 and individual-vessel build/machinery tables pp. 62-66 (SC669 row, Daytona Beach Boat Works entry; machinery row 'SC669 ... 800 ... S.K. ... 15.6')
- Finding type
- vessel_history
- Finding
- The official Ships' Data 1945 individual-vessel table lists SC669 built by Daytona Beach Boat Works, Inc., Daytona Beach, Fla.; keel laid 17 Nov 1941; launched 21 Mar 1942; date of first commission 24 Jul 1942; machinery table lists her engines as G.M. 8-268A, 800 shaft horsepower, S.K. (Snow & Knobstedt) reduction gear, 15.6 knots trial speed. The 110'SC class block gives 110'10" overall, 107'6" waterline, 17'0" extreme beam, 95 tons standard / 148 tons full-load displacement, 2 propellers, diesel engines, single reduction gear, two 20-kW diesel ship's-service generators (120 V DC); footnote: 'All SC's are wood hulls.'
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1942 (construction); 1945 (publication)
- Population
- Daytona Beach Boat Works construction trades (1941-42); commissioning crew
- Limitations
- Official 1945 publication: construction, machinery, and dimensional data only - contains no insulation-material, asbestos, or hazardous-material information. '800 shp' shaft horsepower vs NavSource's '880 bhp' per engine - different rating conventions, carried in gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-01
-
[3]Naval Historical Center (now NHHC) Online Library of Selected Images, 'USS SC-669, 1942-1947' ship page (Department of the Navy; mirrored on HyperWar/ibiblio - no live history.navy.mil equivalent located) [other_primary]
- Locator
- capsule text; photo block NH 96482 (picture data: ibiblio.org/hyperwar/OnlineLibrary/photos/images/h96000/h96482c.htm)
- Finding type
- vessel_history
- Finding
- Official capsule: 'USS SC-669, a 95-ton 110-foot submarine chaser, was built at Datona Beach [sic], Florida. Commissioned in July 1942, she was initially based at Charleston, South Carolina. In September 1942, she was reassigned to the Gulf Sea Frontier. Later, SC-669 was sent to the Pacific for employment in the South Pacific, with her home yard at Pearl Harbor. She arrived at Tutuila, Samoa, in late January 1943. In October 1945, she was assigned to the 12th Naval District and was decommissioned the next month. USS SC-669 was sold in March 1947.' Page carries Naval Historical Center photograph NH 96482: USS SC-669 and USS SC-508 at the Charleston Navy Yard, 10 August 1942.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1947
- Population
- WWII crew (~28); Charleston Navy Yard and Gulf Sea Frontier period
- Limitations
- Brief capsule; omits the PC-669 designation and the RO-107 action entirely. '95-ton' is standard displacement (Ships' Data gives 95 standard / 148 full load). Contains no asbestos or material information. Page dated 2001; live history.navy.mil equivalent not located - ibiblio mirror cited.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-02
-
[4]NavSource Online: Submarine Chaser Photo Archive, SC-669 page (Joe Radigan / Gary P. Priolo archive, maintained by Tom Bateman) [other_primary]
- Locator
- SC-669 page, specifications block and CO list
- Finding type
- vessel_history
- Finding
- NavSource records: 'ex-PC-669'; laid down 17 November 1941 by Daytona Beach Boat Works Inc., Daytona Beach, FL; launched 21 March 1942; commissioned PC-669, 24 July 1942; reclassified SC-669 in April 1943; decommissioned November 1945; struck from the Naval Register 19 December 1945; transferred to the Maritime Commission 26 March 1947; sold to the Philippines; fate unknown. Call sign Nan-William-Uncle-Queen. COs: LT Frederic Gibbs USN (May 1943), LTJG S. C. Allen USNR (1945). Specs: 148 t., 110'10", 17' beam, 6'6" draft, 15.6 kts, complement 28, one 40mm mount, two .50-cal MG, two Y-guns, two DC tracks; two 880-bhp GM 8-268A diesels, Snow & Knobstedt single reduction gear, two shafts.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1947
- Population
- WWII crew (~28 complement); post-disposal Philippine buyer
- Limitations
- Volunteer-maintained archive (secondary), but the standard reference for small patrol craft and here corroborated line-for-line by official Ships' Data and the NHHC capsule. Its RO-107 claim is handled separately (ev-05/ev-06). 'Sold to the Philippines' is NavSource-only - NHHC supports 'sold March 1947' but not the buyer.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-03
-
[5]Ships' Data 1945 renaming/renumbering index ('PC628-775 Now SC628-775') + NavSource SC-669 page ('Commissioned PC-669 ... Reclassified SC-669 in April 1943') [other_primary]
- Locator
- SDB1945v2.pdf index section ('PC628-775 Now SC628-775'); NavSource SC-669 header 'ex-PC-669'
- Finding type
- vessel_history
- Finding
- SC-669 carried a PC designation only as a numbering artifact: the official Ships' Data index records the entire block 'PC628-775 Now SC628-775' - hulls numbered PC-628 through PC-775 were 110-foot wooden SC-type subchasers renumbered into the SC series (April 1943 per NavSource). The hull was never a 173-foot PC-461-class steel patrol craft, and no PC-461-class vessel ever held the number PC-669.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- Documents the renumbering mechanism, not the reason; NavSource gives the April 1943 reclassification date, Ships' Data documents the mapping but not the date. Corrects the plausible misreading of 'PC-669' as a patrol craft without overstating: the commissioning designation itself (PC-669, 24 Jul 1942) is per NavSource.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-04
-
[6]Joint Army-Navy Assessment Committee, Japanese Naval and Merchant Shipping Losses During World War II by All Causes (NAVEXOS P-468, Feb 1947; chronological naval-losses table, mirrored on HyperWar/ibiblio) + NavSource SC-669 page [other_primary]
- Locator
- JANAC chronological table, May 1943 section, row '28 | RO 107 | Submarine | 525 | 15-35S, 167-17E | United States | Surface Craft | Sunk'; NavSource SC-669 page
- Finding type
- vessel_history
- Finding
- The wartime/postwar official record credited SC-669 with sinking Japanese submarine RO-107: NavSource records 'Sank Japanese submarine RO-107, 29 May 1943 off Kolombangara Island, Central Solomon Islands,' and JANAC assessed RO-107 as sunk 28 May 1943 at 15-35S, 167-17E (Espiritu Santo area) by United States surface craft - matching SC-669's claimed action.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943; 1947 (JANAC assessment)
- Limitations
- Verifies that the credit exists in official records - not that the sinking occurred. The attribution is now regarded as erroneous (ev-06): RO-107 was still transmitting on 6 July 1943. NavSource's Kolombangara location matches neither JANAC's assessed position (Espiritu Santo area, ~500 nm distant) nor RO-107's documented July position east of Rendova.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-05
-
[7]Bob Hackett & Sander Kingsepp, 'IJN Submarine RO-107: Tabular Record of Movement' (combinedfleet.com TROM, rev. 4) + U.S. Navy-compiled Japanese submarine casualties list ('Submarine Losses, World War II' annex, mirrored on HyperWar) crediting USS Taylor (DD-468), 12 Jul 1943, 08-00S 157-19E + NHHC SC-669 capsule (omits the action) [reputable_press]
- Locator
- combinedfleet.com/RO-107.htm (TROM entries 20 Jun, 30 Jun, 6 Jul 1943; Authors' Note [1]); ibiblio.org/hyperwar/USN/SubLosses/SS_losses-japanese.html (12 Jul RO-107/Taylor row); NHC Online Library sc669.htm
- Finding type
- vessel_history
- Finding
- The RO-107 attribution is erroneous. TROM documents RO-107 returning to Rabaul 20 June 1943 after her second patrol, departing on her third war patrol 30 June, and transmitting her last message 6 July 1943 east of Rendova - weeks after the claimed 28/29 May sinking. Official compilations also disagree: the Navy's Japanese submarine casualties list credits USS Taylor (DD-468) with RO-107 on 12 July 1943 at 08-00S 157-19E - itself probably an error, since TROM notes Taylor's actual victim was RO-101, which survived - and NHHC's SC-669 capsule omits the action entirely. RO-107's actual cause of loss is unresolved; she was declared lost with all 42 hands and stricken 1 September 1943.
- Verification
- disputed
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943
- Limitations
- TROM is secondary scholarship (the standard English-language reference for IJN movements), not an official source - but the conflict is also visible inside official records (JANAC vs the casualties list vs NHHC's omission). SC-669 presumably attacked a submarine off Espiritu Santo in late May 1943; what she attacked, and whether it sank, is unestablished by the sources located.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-06
-
[8]uboat.net Allied Warships, USS SC-669 (SC-669) entry (Guomundur Helgason reference work) [other_primary]
- Locator
- uboat.net ship 8886 data table; 'Notable events' 8 Jul 1945
- Finding type
- vessel_history
- Finding
- Corroborates construction data (Daytona Beach Boat Works; ordered 18 Sep 1941; laid down 17 Nov 1941; launched 21 Mar 1942; commissioned 24 Jul 1942) and records a late-war event: on 8 July 1945 SC-669 (Lt.(jg) S. C. Allen, USNR) escorted USS Dragonet (SS-293) and USS Spikefish (SS-404) out of Guam on their war patrols - consistent with NavSource's 1945 CO listing and Pacific service.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Limitations
- Private reference work (secondary); used for corroboration only - every carried fact is also in official sources except the 'ordered 18 Sep 1941' date and the 8 Jul 1945 escort event, both reasonable but single-sourced here.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-07
-
[9]Era inference built on: Ships' Data 1945 110'SC class block (wood hull; two GM diesels; single reduction gear; diesel ship's-service generators - no steam plant) + class-standard small-craft outfit [other_primary]
- Locator
- SDB1945v2.pdf, 110'SC class spec block (pp. 60-61)
- Finding type
- asbestos_application
- Finding
- A wood-hulled, diesel-driven 110-foot subchaser built 1941-42 sits inside the Navy's documented asbestos-use era, but her asbestos-relevant system inventory is far smaller than a steam vessel's: no boilers, turbines, or steam lines - hence no boiler/turbine lagging pathway. Candidate era-standard applications aboard a boat of this type and period were diesel exhaust and muffler lagging, gaskets and valve/machinery packing in fuel, cooling, and exhaust systems, and electrical insulation.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1947
- Population
- Daytona Beach Boat Works construction trades (1941-42); WWII crew; any repair/upkeep trades at Charleston, Gulf ports, Pearl Harbor
- Limitations
- Era inference only - no hull-specific insulation survey, material list, work package, or class-level asbestos documentation located for SC-669 or the SC-497 type. Names era-standard candidate applications, not confirmed installed materials; no quantities; no manufacturer attribution. Wooden construction itself removes several common asbestos carriers (no extensive pipe lagging runs).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-08
-
[10]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s - spanning this hull's entire construction (1941-42) and service era (1942-45).
- 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 the SC-497 class. Full text not retrieved (gao.gov returns HTTP 403 to automated fetch, confirmed 2026-10-03) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-09
-
[11]Batch-8043 search ledger (this record): Ships' Data 1945 build/machinery/index tables; NHC/NHHC Online Library capsule + photo NH 96482; NavSource SC-669 page; JANAC chronological losses table; combinedfleet TROM RO-107; Navy Japanese submarine casualties list; uboat.net; NARA catalog; navypedia Philippine SC list (secondary check); GAO HRD-80-2 (blocked); CourtListener (see ledger) [other_primary]
- Locator
- search_ledger rows sl-uss-sc-669-sc669-01 through sl-13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, insulation inventory, abatement contract, hazmat disclosure, or verified litigation naming SC-669/PC-669 was found in the public sources searched (see search_ledger). Additionally, no DANFS history exists for SC-669 - NavSource states this explicitly and NHHC site search returns no SC-669 page. CAVEAT: CourtListener could not be queried this session - every authenticated request via cl-auth-search.py was turned away by the fleet-wide pacing gate (~58/hr shared budget, 'momentarily spent') on 6 spaced attempts over ~45 minutes; logged as blocked in search_ledger, not as a negative result.
- 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 - and the litigation repository search is a genuine open gap (paced out, never run). Open leads: NARA RG 24 WWII deck logs (digitization unverified - catalog JS-blocked), SC-669's wartime action reports, and Maritime Commission/FLC sales records for the 1947 Philippine disposal. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-10
-
[12]NARA RG 24 (WWII deck logs) + catalog.archives.gov [other_primary]
- Locator
- catalog.archives.gov query 'SC-669 submarine chaser' (JS shell returned)
- Finding type
- vessel_history
- Finding
- Open archival lead: WWII deck logs for SC-669 should exist in NARA RG 24 holdings (1942-45), and her 29 May 1943 action report would sit with BuShips/OpNav records. NARA's catalog API returned a JavaScript application shell to scripted queries this session - digitization status of the SC-669 logs unverified.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945 (log coverage)
- Limitations
- Lead only - not a located record. Catalog UI is JS-rendered; direct NAID not identified this session.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-669-sc669-11