Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
-
[1]research packet 923-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-673-sc673-pkt-923-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-673 (ex-PC-673) - construction, designation, transfer, and disposition timeline with spec block [other_primary]
- Locator
- NavSource 12/150673.htm header block, 'SC-497 Class Submarine Chaser' timeline, and specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 7 November 1941 by the Thomas Knutson Shipbuilding Corp., Halesite, Long Island, NY; launched 16 May 1942; commissioned USS PC-673, 8 July 1942; reclassified SC-673 in April 1943; transferred to the Soviet Union 4 June 1945 and reclassified BO-316; assigned to the Soviet Pacific Fleet 17 June 1945; placed out of service 15 April 1955 and laid up in reserve; scrapped 17 October 1955. Spec block: displacement 148 t; length 110'10"; beam 17'; draft 6'6"; speed 21 kts; complement 28; armament one 40mm mount, two .50 cal machine guns, two depth-charge projector 'Y Gun,' two depth-charge tracks; propulsion two 1,540 bhp General Motors (Electro-Motive Div.) 16-184A diesel engines, two shafts. Call sign Nan-William-Victor-Fox. 'There is no DANFS history available for SC-673.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1955
- Population
- Knutson yard construction trades (1941-42); US Navy crew ~28 (1942-45); Soviet crew (1945-55)
- Limitations
- Ship-specific milestone and spec documentation only; no asbestos or material content. NavSource is a volunteer secondary compilation, not a primary registry - its dates generally track official lists but the 4 June transfer date conflicts by one day with the NHHC Project Hula appendix's 5 June (see gaps). No US-service operational history is present - only dates. Live page verified 2026-10-03 (navsource.net domain - the .org domain is dead per standing citation-hygiene rule).
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-01
-
[3]Richard A. Russell, 'Project Hula: Secret Soviet-American Cooperation in the War Against Japan' (Washington: Naval Historical Center, 1997) - official NHHC/NHC publication; appendix table 'U.S. Navy Combatant Ships Transferred to the USSR Under Project HULA' and designation glossary [nhhc_danfs]
- Locator
- Appendix 'U.S. Navy Combatant Ships Transferred to the USSR Under Project HULA,' SC section, pp. 39-40; designation glossary p. 40; narrative pp. 18-20 (subchaser program difficulties, convoy departures)
- Finding type
- vessel_history
- Finding
- The NHHC publication's transfer appendix lists 'SC673 -> B0-316', transfer date 5 June [1945] (the 5 June group under SC657/BO-307), disposition '1955-stricken' (generalstaff.org clean-text rendering of the same appendix: 'SC 673 | BO-316 | 5 June | 1955-stricken'). The glossary defines Soviet 'BO (bolshiye okhotniki za podvodnymi lodkami) - large hunters for submarines.' Program context documented: Navy Detachment 3294 transferred 149 ships in 142 days at Cold Bay; the subchaser transfer program was 'trouble-plagued' - wooden-hulled vessels suffered hull damage in rough seas, nine subchasers made ~400-mile round trips to Dutch Harbor for major repairs, Seattle supply shortages forced 13th Naval District subchaser substitutions. Appendix sources: NAVSHIPS 250-012 Ships Data Vol. II (1 Jan 1949) and Berezhnoi, Flot SSSR: lend-lease reference (1994).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945 (program April-September 1945)
- Population
- Soviet crews trained at Cold Bay (~12,000 personnel program-wide); US Navy Detachment 3294 personnel
- Limitations
- Official US Navy historical publication citing NAVSHIPS data and the Berezhnoi Soviet reference - highest-authority source for the transfer. The appendix's 5 June transfer date conflicts by one day with NavSource/sewar.ru's 4 June Soviet-crew-acceptance date (reconciled as ceremony-vs-departure; flagged in gaps). The appendix gives no hull-specific detail beyond designation pair, date, and disposition. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-02
-
[4]uboat.net Allied Warships, USS SC-673 (SC-673) - order date, milestones, transfer (secondary compilation) [other_primary]
- Locator
- uboat.net/allies/warships/ship/8890.html warship data table
- Finding type
- vessel_history
- Finding
- uboat.net entry for this hull: submarine chaser of the SC-497 class; built by Thomas Knutson Shipbuilding Corp. (Halesite, Long Island, New York); ordered 18 September 1941; laid down 7 November 1941; launched 16 May 1942; commissioned 8 July 1942; end service 5 June 1945; history: 'Transferred to the USSR on 5 June 1945.' No commanders or wartime events are listed for this vessel.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Limitations
- Secondary compilation (uboat.net Allied Warships database) - corroborates NavSource dates and supplies the only located order date (18 Sep 1941); its 5 June end-service date matches the NHHC appendix. No asbestos content. Live page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-03
-
[5]Naval Marine Archive (shipbuildinghistory lineage), 'Knutson Shipbuilding, Halesite NY' - builder's hull table listing SC 673 and the yard's wartime output [other_primary]
- Locator
- navalmarinearchive.com/sbh/shipyards/emergencysmall/knutson.html hull table, SC 673 row; companion smallships/pc2.html SC-673 row ('SC 673 | Knutson SB | Halesite NY | 148 | 110 | 8-Jul-42 | to the USSR 1945 as BO-316')
- Finding type
- historical_record
- Finding
- The yard's documented hull table lists SC 673 - US Navy Sub Chaser, 110 ft, 136 tons, delivery 8-Jul-42, disposition 'To the USSR 1945 as BO-316' - among 110-ft subchasers built at Halesite (also SC 672, SC 678-681, SC 1333-1340, SC 1498-1500 series). The compilation notes the SC/PC/PCE/PCS types 'all us[ed] a single series of pennant numbers' - the structural basis for this hull's PC-673 -> SC-673 reclassification. The Thomas Knutson Shipbuilding Corporation was started by Thomas Knutson in 1935 and operated at the south corner of Huntington harbor.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1945
- Population
- Knutson yard construction trades (1941-42)
- Limitations
- Secondary shipbuilding-data compilation (Colton shipbuildinghistory lineage now hosted by Naval Marine Archive) - the yard attribution conflicts with navypedia/Russian sources (Walter E. Abrams, Halesite); the physical-site note that the wartime Abrams yard is today's Knutson Marine comes from the Town of Huntington (see ev-08). No asbestos content. Live page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-04
-
[6]sewar.ru (Russian WWII-arms encyclopedia), BO-316 (ex-SC-673) vessel entry - Soviet-side service milestones (secondary source, Russian-language) [other_primary]
- Locator
- sewar.ru BO-316 entry (tip-sc-bo-316 page), service chronology
- Finding type
- vessel_history
- Finding
- Soviet-service record for this hull (translated): 'Type "SC". BO-316 (until 10.01.1945 "SC-673"). Entered service 8.07.1942. Accepted by Soviet crew 4.06.1945. 17.06.1945 entered the Pacific Fleet [TOF]. 15.04.1955 withdrawn from combat composition and placed in reserve. Stricken from the USSR Navy list 17.10.1955, disarmed and handed to the fund-property department [OFI] for dismantling.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-1955
- Population
- Soviet crew and Soviet dismantling workers (1945-55)
- Limitations
- Russian-language secondary encyclopedia (Berezhnoi-lineage data) - corroborates NavSource's Soviet-side milestones and supplies the disarmed/stricken-for-dismantling detail. The 'until 10.01.1945' designation note aligns with Lesta Wiki's 'enrolled in Soviet Navy ship lists 10 January 1945' - i.e., BO-316 was pre-assigned in Soviet records before physical transfer. No asbestos content. Live page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-05
-
[7]Lesta Wiki (Russian naval-history wiki), BO-316 (1945) article - detailed Soviet-service chronology including August 1945 employment claim (secondary source, Russian-language) [other_primary]
- Locator
- wiki.lesta.ru BO-316 (1945) article, service chronology paragraph
- Finding type
- vessel_history
- Finding
- Additional Soviet-service detail for this hull (translated): enrolled in USSR Navy ship lists 10 January 1945; accepted by Soviet crew at Cold Bay 4 June 1945 under Lend-Lease; departed Cold Bay 7 June 1945; arrived Petropavlovsk-Kamchatsky and entered the Pacific Fleet 17 June 1945; 'participated in the Great Patriotic War: defense of communications and bases in the Sea of Japan in 08.1945'; member of the 5th Navy from 17 January 1947 to 23 April 1953; withdrawn from combat composition, conserved and laid up 15 April 1955; disarmed and stricken from the USSR Navy 7 October 1955 for transfer to the fund-property department for dismantling and scrapping for spare parts.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1945-1955
- Population
- Soviet crew (1945-55); 5th Navy personnel (1947-53)
- Limitations
- PARTIAL verification: gaming-community wiki (Lesta/WoWS) - its data lineage is Berezhnoi's Soviet lend-lease reference (the same source the NHHC appendix cites), but no primary Soviet record was accessed. Uniquely supplies the August 1945 Sea-of-Japan employment claim, the 5th Navy period, and a 7 October 1955 striking date conflicting with sewar.ru/NavSource's 17 October (flagged in gaps). No asbestos content. Live page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-06
-
[8]Town of Huntington, NY, 'Spirit of Huntington' mural record - documents 'the Walter E. Abrams Shipyard (now known at Knutson Marine) in Halesite' as the 24 April 1943 launch site of a citizen-financed submarine chaser [other_primary]
- Locator
- huntingtonny.gov Public Art - 'Spirit of Huntington' mural description, Hamlet of Huntington Village
- Finding type
- historical_record
- Finding
- BUILDER-NAME CONFLICT: US-side compilations (NavSource, uboat.net, Naval Marine Archive/shipbuildinghistory) attribute this hull to the Thomas Knutson Shipbuilding Corp., Halesite; navypedia and the Russian Berezhnoi-lineage sources attribute it to the Walter E. Abrams shipyard, Halesite. The Town of Huntington documents the wartime 'Walter E. Abrams Shipyard (now known at Knutson Marine)' at Halesite - i.e., the two corporate names attach to the same physical yard site, today's Knutson Marine property. The builder field carries Knutson (majority US-side attribution); the Abrams attribution is unresolved, not dismissed.
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1943
- Population
- Halesite yard construction trades (1941-42)
- Limitations
- Municipal-history source documenting the physical yard's name lineage (Abrams yard site = present Knutson Marine) - it does not by itself prove which corporate entity built SC-673; the NavSource/uboat/Colton attribution to Knutson and the navypedia/Berezhnoi attribution to Abrams remain in conflict (see gaps). No asbestos content. Live page verified 2026-10-03.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-07
-
[9]Era inference built on: NavSource ship-page spec block (wooden hull, 2 x GM 16-184A diesels, twin screws); NavSource SC index class description (580 SC-497-class 110-ft wood-hulled subchasers); GAO HRD-80-2 era documentation (see ev-09); absence of any steam plant [other_primary]
- Locator
- NavSource 12/150673.htm spec block; NavSource SC index (12/15idx.htm) class summary; GAO HRD-80-2 product page
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel submarine chaser built 1941-42 sits inside the Navy's documented asbestos-use era, but the pathway is narrower than for steam vessels: with no steam plant aboard, no boiler/turbine lagging pathway applies. Era-standard asbestos-relevant applications aboard a small diesel craft of this period were engine exhaust lagging, machinery and flange gaskets, valve packing, electrical insulation, and heat shielding/mastics in accommodation and galley spaces - inferred at class/era level for a 110-ft SC-497 hull.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1955
- Population
- Knutson/Abrams yard trades (1941-42); US Navy crew ~28 (1942-45); Soviet crews and 5th Navy personnel (1945-55); Soviet dismantlers (1955)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for SC-673; names era-standard applications, not confirmed installed materials. No quantity. The 1945-55 Soviet-service decade is outside all US documentation channels - any Soviet-era material changes are undocumented in sources located.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-08
-
[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 US construction (1941-42) and US 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 - and the 1945-55 Soviet-service decade is outside its scope. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, standing defect confirmed in prior batches) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-09
-
[11]Batch-8047 search ledger (this record): NavSource; NHHC Russell Project Hula PDF (ibiblio); uboat.net; Naval Marine Archive; sewar.ru; Lesta Wiki; navypedia; HyperWar; Knutson Marine (Wayback); Town of Huntington; CourtListener (blocked - fleet pacing); NARA (JS-blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-sc-673-sc673-01 through sl-uss-sc-673-sc673-13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming SC-673/PC-673/BO-316 was found in the public sources searched (see search_ledger). CourtListener could not be queried this session - the fleet-wide pacing limiter reported the request budget momentarily spent on every attempt; logged as blocked in search_ledger, not a negative result. Secondary web sweeps surfaced no qualifying case; 'SC-673' produces South Carolina reporter-citation collision noise, not ship hits. Hull dismantled in the USSR in 1955 - no US disposal, MARAD, or museum channel exists for hazmat records.
- 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 (fleet-paced, not run). Soviet-service-period documentation is inaccessible in public Western sources; the Berezhnoi reference is the lead. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-sc-673-sc673-10