Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 925-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-sc-687-sc687-pkt-925-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-687 (12/150687) - designation timeline, specifications, Soviet-service milestones; page verified live 2026-10-03 [other_primary]
- Locator
- NavSource 12/150687 header timeline block and specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: 'Laid down 21 January 1943 as PC-687 by the American Cruiser Co., Trenton, MI; Reclassified SC-687 in April 1943; Launched 5 June 1943; Commissioned SC-687, 23 August 1943; Transferred to the Soviet Union 26 May 1945 and reclassified BO-301; Placed in service 30 May 1945; Assigned to the Pacific Fleet 8 June 1945; Placed out of service 1 February 1954 and subsequently scrapped.' Specifications: 100 t; 110'10" x 17' x 6'6"; 21 kts; complement 28; one 40mm gun mount, two .50 cal. machine guns, two 'Y Gun' depth-charge projectors, two depth-charge tracks; two 1,540 bhp General Motors (EMD) 16-184A diesels, two shafts. Page states 'There is no DANFS history available for SC-687' and no image of the hull is held.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1954
- Population
- American Cruiser construction trades (Jan-Aug 1943); USN crew (~28, 1943-45); Soviet crew (1945-54)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track Navy records but the page cites no primary source per line. The Soviet-service milestones (30 May 1945 in-service, 8 June 1945 Pacific Fleet, 1 Feb 1954 out of service) rest on NavSource's Soviet-data compilation; the NHC Project Hula appendix independently corroborates BO-301 and '1954-stricken'. Contains no asbestos content. The scrapping predates modern ACM-handling regulation in any case; no material record exists.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-01
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[3]Richard A. Russell, 'Project HULA: Secret Soviet-American Cooperation in the War Against Japan' (The U.S. Navy in the Modern World Series No. 4, Naval Historical Center, Department of the Navy, Washington, 1997), appendix 'U.S. Navy Combatant Ships Transferred to the USSR Under Project HULA, May-September 1945' [other_primary]
- Locator
- Appendix table, SC-section rows (pp. 39-40 of the monograph PDF); narrative pp. 20, 28
- Finding type
- vessel_history
- Finding
- The official Naval Historical Center monograph's transfer appendix lists this hull: 'SC687' -> Soviet designation 'B0-301', transfer date 26 May 1945 (ditto-chained from the BO-304 row), disposition '1954-stricken'. Narrative context documented: the subchaser transfer program was 'trouble-plagued' - wooden-hulled subchasers and motor minesweepers suffered hull damage in rough training-area seas, nine subchasers made the ~200-nautical-mile trip to Dutch Harbor for major repairs delaying the program eight days, and poor Seattle repair work and supply shortages forced substitution of 13th Naval District subchasers for some scheduled hulls; the second transferred-ship convoy (three minesweepers and six subchasers) departed Cold Bay for Petropavlovsk 30 May 1945.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945 (appendix coverage to 1960 dispositions)
- Population
- USN and Soviet transfer personnel at Cold Bay (May 1945); Soviet crew to Petropavlovsk
- Limitations
- Official U.S. Navy history, ship-specific on the transfer mapping and disposition. The appendix is a compiled table - it does not narrate this hull's individual Cold Bay arrival or training, so her presence in the 30 May second convoy is consistent inference (six SCs transferred 26 May; six SCs departed 30 May), not an explicit row. '1954-stricken' is the Soviet-fleet accounting disposition; physical scrapping is documented by NavSource, not this source. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-02
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[4]uboat.net Allied Warships, USS SC-687 (SC-687) - build/milestone table; 'Notable events' sourced to the war diary of USS Alden (DD-211), October 1944; page verified live 2026-10-03 [other_primary]
- Locator
- uboat.net ship/8903.html milestone table; 'Notable events' entries 16-31 Oct 1944
- Finding type
- vessel_history
- Finding
- Build/milestone table for this hull: Navy - US Navy; type submarine chaser; class SC-497; built by American Cruiser Inc. (Trenton, Michigan); ordered 16 Feb 1942; laid down 21 Jan 1943; launched 5 Jun 1943; commissioned 23 Aug 1943; end service 26 May 1945 - 'Transferred to the USSR on 26 May 1945.' Notable events: on 16, 17, 19, 22-26, and 28-31 October 1944 USS SC-687 (Lt.(jg) T. L. Hickey, USNR) conducted anti-submarine exercises in the Gulf of Panama with submarine USS Kraken (joined by USS Sea Robin 16 Oct), destroyer USS Alden, minesweeper USS Mallard (19 Oct onward), and USS SC-541 - sourced to USS Alden's war diary for October 1944.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1945
- Population
- SC-687 crew under Lt.(jg) T. L. Hickey USNR (Oct 1944); exercise participants USS Kraken, Sea Robin, Alden, Mallard, SC-541
- Limitations
- Secondary compilation (Gudmundur Helgason's Allied Warships database), though event entries cite the USS Alden war diary. The 'ordered 16 Feb 1942' date is single-source - NavSource carries no order date; carried with attribution, flagged in gaps. Establishes an operational detail (Gulf of Panama ASW exercises, one named commanding officer) but contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-03
-
[5]HyperWar/NHC, 'U.S. Naval Activities, World War Two, By State [Michigan]' - lists 'Branch Office, Supervisor of Shipbuilding, American Cruiser Co., Trenton, Mich.'; corroborates this hull's builder location [other_primary]
- Locator
- USN-Act/MI.html, 'Trenton, Michigan' section
- Finding type
- historical_record
- Finding
- A wartime U.S. Navy activity listing places a Supervisor of Shipbuilding branch office at 'American Cruiser Co., Trenton, Mich.' - independently corroborating that this hull's builder (named on the NavSource and uboat.net pages) operated at Trenton, Michigan, and undercutting a 'Wilmington DE' column value appearing in one shipbuildinghistory table (see gaps; that site's own yard index lists 'American Cruiser | Detroit/Trenton | MI').
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- American Cruiser Co. workforce and Navy supervisors, Trenton MI (wartime)
- Limitations
- Yard-level documentation only: names the builder and its wartime Navy supervision, not this hull or any material aboard her. Does not establish construction details, workforce size, or any asbestos use at the yard. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-04
-
[6]Era inference built on: NavSource specifications (wooden-hulled SC-497 class; two GM 16-184A diesels, two shafts - diesel plant, no boilers); class program data (438 built 1941-44); GAO HRD-80-2 Navy-wide asbestos-use documentation (see ev-06) [other_primary]
- Locator
- NavSource 12/150687 specifications block; SC-497 class program data; GAO HRD-80-2
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel submarine chaser built January-August 1943 sits inside the Navy's documented asbestos-use era. For a craft of this type, era-standard applications were engine-exhaust lagging, machinery-room insulation, gaskets, valve packing, and electrical insulation - a materially narrower asbestos profile than steam vessels, since the diesel plant carried no boilers, turbines, or steam-line lagging. The wooden hull itself removes the steel-hull pipe-insulation pathway; residual applications concentrate in the engine compartment and machinery fittings.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1943-1954
- Population
- American Cruiser construction trades (1943); USN crew (~28, 1943-45); Soviet crew (1945-54)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, builder specification, or work package located for SC-687. Names era-standard applications, not confirmed installed materials; no quantity, no manufacturer attribution. Wooden-hulled 110-ft craft carried substantially less insulation of any kind than steel combatants - the inference is correspondingly weaker than for steam ships.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-05
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[7]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 U.S. construction (1943) and service period (1943-45).
- 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. Full text not retrieved - gao.gov returns HTTP 403 to automated fetches (confirmed 2026-10-03); no Wayback snapshot of the product page exists; report content carried from the established description (consistent with Batch-01 and Batch-98 usage).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-06
-
[8]Batch-8061 search ledger (this record): NavSource hull page (live); NHC Project Hula monograph appendix (PDF text-extracted); uboat.net (live); HyperWar USN-Act Michigan; NHHC DANFS (404); NVR (pre-1987 exclusion); PCSA; shipbuildinghistory (HTTP 500 on fetch); NARA catalog (JS-rendered); CourtListener (pacing-blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-687-sc687-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming SC-687/BO-301 was found in the public sources searched (see search_ledger). There is no DANFS entry (NavSource states this; NHHC candidate URLs 404 confirmed this session) and no NVR entry (pre-1987 disposal excluded). A secondary web sweep surfaced no qualifying case - only South Carolina state-court name collisions on 'SC' - and, unlike comparable small-craft records, no law-firm listicle asserting asbestos aboard this hull was located. CAVEAT: CourtListener could not be queried this session - the authenticated helper reported the fleet-wide pacing budget spent on six spaced attempts; logged as blocked, 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 - era inference remains plausible. The litigation repository search is a genuine open gap (pacing-blocked, not run). Soviet-era service records (1945-54) - which would carry any material-condition documentation - are not in U.S. public sources; deck logs and BuShips work packages are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-07
-
[9]Designation cross-check: NavSource hull timeline ('Laid down ... as PC-687 ... Reclassified SC-687 in April 1943'); uboat.net milestone table (SC-687 only); PC-461-class construction record (batch re-scope note, Trill fact-QA 2026-09-29: 341 completed + 60 cancelled; PC-679-720 in neither enumeration) [other_primary]
- Locator
- NavSource 12/150687 header; uboat.net ship/8903.html table
- Finding type
- historical_record
- Finding
- CORRECTION: 'PC-687' was never a patrol craft in service. This hull was laid down 21 January 1943 carrying the PC-series number PC-687 and reclassified to the subchaser series as SC-687 in April 1943 - before her June launch and August commissioning; she was commissioned SC-687 and served under that designation exclusively. NavSource's 'ex-PC-687' header denotes the pre-launch building designation only. Any database record presenting 'USS PC-687' as a commissioned patrol vessel is an error: the PC-461-class enumeration (341 completed + 60 cancelled per the 2026-09-29 re-scope QA) contains no completed PC-687.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943
- Limitations
- Corrects a designation trap, not a material claim. The reclassification date 'April 1943' is NavSource's; the PC-461 enumeration figures are from batch-level QA research (2026-09-29), consistent with public build tables but not re-derived line-by-line this session. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-08
-
[10]NARA archival lead: RG 24 deck logs for SC-687 (Aug 1943-May 1945); catalog.archives.gov search for 'SC-687' could not be completed - catalog is JS-rendered and returns no content to non-JS fetches [other_primary]
- Locator
- catalog.archives.gov (JS-rendered, unfetchable this session); RG 24 deck-log series
- Finding type
- historical_record
- Finding
- Lead only: U.S. Navy deck logs for this hull's commissioned period (23 Aug 1943 - 26 May 1945) should exist in NARA RG 24; whether SC-687's logs are digitized could not be verified because the NARA catalog interface is JS-rendered (no non-JS result). Project Hula administrative records (Navy Detachment 3294, Cold Bay) and BuShips small-craft construction records for American Cruiser are additional undigitized leads. Soviet Pacific Fleet records for BO-301 (1945-54) are outside U.S. public archives.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1945 (logs); 1945 (Hula records)
- Limitations
- Unverified lead, not a located record. Deck logs would document operations and any recorded material incidents but very rarely contain asbestos-specific entries; BuShips work packages are the stronger lead for materials. No asbestos content located via this path.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-687-sc687-09