Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 929-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-720-pc720-pkt-929-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-720 (ex-PC-720) - timeline, specifications, and c.1944 Hamilton, Bermuda transfer photo [other_primary]
- Locator
- NavSource 12/150720.htm header block, timeline, specifications block, and photo captions
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 16 November 1942 as PC-720 by Fisher Boat Works, Detroit, MI; launched 10 April 1943 and reclassified SC-720; commissioned USS SC-720, 3 August 1943; transferred to the Soviet Union 7 October 1943 and reclassified BO-211; assigned to Polyarny, Murmansk 29 February 1944; assigned to the Black Sea Fleet 15 July 1944; returned to the United States 4 August 1954; 'Fate unknown.' Specifications: 148 t., 110'10" x 17' x 6'6", 21 kts, complement 28; one 40mm mount, two .50 cal MG, two Y-gun depth-charge projectors, two depth-charge tracks; two 1,540 bhp General Motors (EMD) 16-184A diesels, two shafts. Page captions document BO-211 at Hamilton, Bermuda c.1944 in company with BO-208 (ex-SC-1075), BO-209 (ex-SC-1076), and T-118/119/120 (ex-AM-145/-146/-147) - a Lend-Lease transfer group still wearing US hull numbers. Page states there is no DANFS history available for SC-720.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1954
- Population
- Fisher Boat Works construction trades (1942-43); US crew (Aug-Sep 1943); Soviet crew (1943-54); post-1954 disposition population unknown
- Limitations
- Volunteer secondary compilation, not a primary registry; milestone dates corroborated by the NARA muster roll (ev-02) and by independent secondary compilations. Its 'Transferred to the Soviet Union 7 October 1943' merges the 24 September decommissioning and the 7 October Soviet acceptance into one line - see ev-02 for the US-side date. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-01
-
[3]NARA Catalog, File Unit 'SC-720, 8/3/43-9/24/43' (NAID 192211090), RG 24 Bureau of Naval Personnel, series Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities (NAID 594996), microfilm Roll 6839 - 24 images digitized via Ancestry partnership [other_primary]
- Locator
- NAID 192211090; forwarding-sheet image (frame 5 of 24) inspected via catalog IIIF images this session; Roll 6839, NARA College Park
- Finding type
- historical_record
- Finding
- Primary crew record for this hull's entire US commissioned life. The digitized forwarding sheet (frame 5 of 24) is headed 'MUSTER ROLL OF THE CREW OF THE U.S.S. SC 720,' is dated 'On the 24 day of September, 1943,' and carries a handwritten annotation noting the commission span 8-3-43 through 9-24-43 with the decommissioning notation. Certified correct by C. E. Curry, Ensign, USNR, Executive Officer; approved by L. F. Eaton, Jr., Lt. (jg), USNR, Commanding Officer; forwarded 24 September 1943 from 'USS SC-720, c/o Fleet Post Office, New York, N.Y.' The package comprises a 2-page quarterly roll, 8 pages of Reports of Changes, and a 2-page recapitulation sheet - naming every enlisted man attached to the hull during its roughly seven weeks of US commission.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-08-03 to 1943-09-24
- Population
- Lt. (jg) L. F. Eaton, Jr., USNR (CO); Ens. C. E. Curry, USNR (XO); enlisted crew named in the roll (approx. 28 per NavSource spec block)
- Limitations
- Ship-specific primary record, but it names the crew and documents the commission span only - no asbestos, material, or condition content. The roll establishes the US Navy decommissioning date (24 Sep 1943), which reconciles the NavSource/uboat transfer-date conflict: US decommissioning 9/24 vs Soviet-crew acceptance 10/7. Individual exposure is not established by presence on a muster roll.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-02
-
[4]sewar.ru, 'Tip SC. BO-211 (do 18.08.1943 g. SC-720)' (Russian-language naval compilation); corroborated by navypedia.org BO-201-class table (BO-211 ex-SC720, Fisher Detroit, to USA 8.1954) and Wurttembergische Landesbibliothek Seekrieg 1939-45 index ('BO-211 (ex-SC 720)') [other_primary]
- Locator
- sewar.ru BO-211 entry; navypedia.org/ships/russia/ru_es_bo201.htm (BO-211 line); wwwstatic.wlb-stuttgart.de/seekrieg/schiffe/pn-b.htm
- Finding type
- historical_record
- Finding
- Soviet-side service record for this hull: built 1943; accepted by the Soviet crew 7 October 1943; arrived Polyarny 29 February 1944 and joined the Northern Fleet; sent 22 May 1944 via inland waterways and rail to Yeysk, joining the Black Sea Fleet 15 July 1944; returned to the USA 4 August 1954. The German wartime Seekriegleitung ship index independently lists 'BO-211 (ex-SC 720)'. Consistent with the NavSource timeline and the NARA muster roll's US decommissioning date.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1954
- Population
- Soviet crew, Northern Fleet and Black Sea Fleet (1943-54)
- Limitations
- Secondary foreign-language compilations, not primary Soviet records - the underlying Soviet archival documentation was not consulted. No asbestos, material, or refit content; whether any work affecting insulation occurred in Soviet service or after the 1954 return is undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-03
-
[5]Shipbuilding History (T. Colton compilation), Fisher Boat Works yard table - via Naval Marine Archive mirror (njscuba.net original returned HTTP 500 this session) [other_primary]
- Locator
- Fisher Boat Works yard table, SC 720 row (navalmarinearchive.com mirror)
- Finding type
- vessel_history
- Finding
- Builder-yard production table for Fisher Boat Works, Detroit MI, lists: 'SC 720 | US Navy | Sub Chaser | 136 tons | 110 ft | 3-Aug-43 | To the USSR 1945 as BO 211' - corroborating builder, delivery date (3 Aug 1943, the commissioning date), and the BO-211 transfer identity. The table also documents the yard's small wooden-boat character (PT boats, SC subchasers, USCG picket boats).
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Population
- Fisher Boat Works construction trades (1942-43)
- Limitations
- Secondary compilation; its '1945' transfer year conflicts with the documented 1943 transfer (muster roll, NavSource, navypedia 'to Soviet Union 9.1943') - the table's transfer-year column is unreliable for this batch and is logged as a variant in gaps. The mirrored page verified live 2026-10-03; the njscuba.net original returned HTTP 500. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-04
-
[6]Era inference built on: NavSource SC-497-class spec block (wooden hull, 2 x GM/EMD 16-184A diesels); Fisher yard table (small wooden-boat builder); GAO HRD-80-2 Navy asbestos-era context (ev-06) [other_primary]
- Locator
- NavSource spec block; Fisher yard table; GAO HRD-80-2
- Finding type
- asbestos_application
- Finding
- A 110-foot wooden-hulled, diesel-engined submarine chaser built Nov 1942 - Aug 1943 sits inside the Navy's documented asbestos-use era, and era-standard applications aboard a diesel subchaser of this period were exhaust-system lagging, machinery gaskets and packing, and electrical insulation. As a diesel boat with no steam plant she carried no boiler/turbine lagging, and her wooden hull reduced thermal-insulation scope relative to steel steamships - the inference is real but narrower than for large steam vessels of the era.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1954
- Population
- Fisher construction trades (1942-43); US crew (Aug-Sep 1943); Soviet crew (1943-54); post-1954 disposition population unknown
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for this hull. Names era-standard applications, not confirmed installed materials; no quantity, no manufacturer attribution. Absence of a steam plant removes the dominant steam-era pathway but does not eliminate exhaust, gasket, or electrical applications.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-05
-
[7]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979; publicly released Oct 22, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (Highlights section)
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's use of asbestos in ships and its worker-protection efforts at the Long Beach and Norfolk Naval Shipyards, documenting the Navy's mid-1970s policy of removing and replacing damaged asbestos insulation - establishing that asbestos insulation was in routine Navy shipboard use across this hull's construction era (1942-43).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1979 (review of 1940s-70s practice)
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation of shipyard-era asbestos policy; does not name this hull, this class, or small craft - supports era context only. Product page verified live via Firecrawl 2026-10-03; the 26-page full report PDF is linked on the product page.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-06
-
[8]Batch-8094 search ledger (this record): NavSource; NARA Catalog (muster roll, verified incl. IIIF images); uboat.net; shipbuildinghistory mirror; sewar.ru/navypedia/WLB-Seekrieg corroborations; GAO HRD-80-2; NVR check; secondary web asbestos sweep; CourtListener (pacing-limited at time of writing) [other_primary]
- Locator
- search_ledger rows sl-uss-pc-720-pc720-01 through -11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS SC-720, PC-720, or Soviet BO-211 was found in the public sources searched. The secondary web sweep surfaced no asbestos claim of any kind for this hull - not even the unsourced law-firm listicles common for other vessels. CAVEAT: CourtListener could not be fully queried this session - the fleet-wide request budget was momentarily spent (helper-script pacing notice); logged as blocked/pending 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 - the hull's 1943 construction sits inside the Navy's asbestos era. The litigation repository search is an open gap (pacing-limited, not run to completion). Soviet-service and post-1954 disposition records are outside US public sources. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-07
-
[9]Designation and class correction, built on: NavSource timeline ('Laid down ... as PC-720 ... launched 10 April 1943 and reclassified SC-720'); NavSource's 'no DANFS history available' note; NHHC 404 check; Fisher yard table [other_primary]
- Locator
- NavSource header/timeline; NavSource 'no DANFS available' note; NHHC 404s (both /danfs/s/sc-720.html and /danfs/p/pc-720.html, this session); Fisher yard table row
- Finding type
- historical_record
- Finding
- CORRECTIONS: (1) The hull never served as a PC-461-class patrol craft: PC-720 was her contract designation - she was laid down as PC-720 and reclassified SC-720 at launch (10 April 1943), completing as an SC-497-class 110-foot wooden submarine chaser. The correct class is SC-497, not PC-461. (2) No DANFS entry exists for this hull: NavSource states there is no DANFS history for SC-720 and both candidate NHHC DANFS URLs return 404 - the 3 August 1943 commission date is documented by NavSource and corroborated by the NARA muster roll's own annotation, not by DANFS. (3) The Fisher yard table's 'To the USSR 1945' transfer year conflicts with the documented 1943 transfer (muster-roll decommissioning 24 Sep 1943, Soviet acceptance 7 Oct 1943); 1943 is carried.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- Corrects identity metadata and a secondary-source date error, not a material claim. The PC->SC reclassification pattern is documented class-wide (dozens of 1942-43 contracts carried PC designations that became SC at completion). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-720-pc720-08