Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
-
[1]research packet 966-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (hull/name pairing confirmed).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-464-pkt-966-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-464 (ex-PCS-1432) - milestone timeline, specifications, Soviet service [other_primary]
- Locator
- NavSource 11/19464.htm header block, YMS-1 class narrative, specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 14 May 1943 as Patrol Craft Sweeper PCS-1432 by the Gibbs Gas Engine Co., Jacksonville, FL; reclassified Auxiliary Motor Minesweeper YMS-464, 27 September 1943 (pre-launch, so the PCS designation was never carried in service); launched 9 December 1943; completed 13 June 1944; 'Transferred to the Soviet Union 15 May 1945 and reclassified T-188'; 'Assigned to the Black Sea Fleet 4 August 1945'; 'Placed out of service 28 January 1958 and scrapped.' Page header: 'YMS-464 served the Navies of the United States and the Soviet Union'; call sign Nan-Queen-Yoke-Roger; no photograph available; 'There is no DANFS History currently available for YMS-464.' Specs: displacement 270 t., length 136', beam 24'6", draft 8', speed 15 kts., complement 32; armament one 3"/50 dual-purpose mount, two 20mm mounts, two depth charge projectors; propulsion two 880bhp General Motors 8-268A diesels, Snow and Knobstedt single reduction gear, two shafts.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1958
- Population
- Gibbs construction trades (1943-44); USN crew (1944-45); Soviet crew (1945-58)
- Limitations
- Ship-specific history only; no asbestos or material content. NavSource is a volunteer secondary compilation whose milestone data generally tracks the Bureau of Ships 'Ships' Data U.S. Naval Vessels' (NAVSHIPS 250-012) series it cites elsewhere - it is not itself a primary registry. 'Completed' wording vs 'commissioned' is noted in gaps. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-01
-
[3]Kchf.ru (Black Sea Fleet information resource), 'Tralshchik T-188' - Soviet service history of this hull (Russian-language secondary compilation) [other_primary]
- Locator
- kchf.ru/ship/tral/t188.htm 'Istoriya korablya' (ship history) and TTD blocks
- Finding type
- vessel_history
- Finding
- Soviet-service detail for this hull: 'Patrol Craft Sweeper PCS-1432 was laid down 14.05.1943 at Gibbs Gas Engine Co. in Jacksonville, USA. On 27.09.1943 reclassified (Auxiliary Motor Minesweeper) and renamed YMS-464. Launched 09.12.1943, entered service 13.06.1944. On 25.10.1944 the ship received the new name T-188. On 15.05.1945 the ship was accepted by a Soviet crew against Lend-Lease deliveries; on 21.07.1945 arrived at Sevastopol and on 04.08.1945 was included in the Black Sea Fleet. On 28.01.1958 the ship was disarmed and excluded from the Navy list in connection with transfer to the stock-property department (OFI).' Soviet-side specs: displacement 320 t.; 41.45 m x 7.46 m x 3.87 m; 12 kts; range 2,030 mi at 9.2 kts; 2x GM 8-268A diesels 880 hp, 2 shafts; 1x 76.2mm, 2x 20mm, 2 depth-charge throwers, 1 electromagnetic sweep, 1 acoustic sweep; crew 33. Class note: wooden construction material chosen to reduce cost.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1958
- Population
- Soviet crew and Black Sea Fleet maintenance/yard personnel (1945-58)
- Limitations
- Russian-language secondary compilation, not an official Soviet/Russian archive publication. The 15 May 1945 transfer, 4 August 1945 Black Sea Fleet assignment, and 28 January 1958 out-of-service dates cross-confirm NavSource; the 25 October 1944 Soviet-designation allocation and the 21 July 1945 Sevastopol arrival are duplicated verbatim by sewar.ru (ev-12) - a shared underlying Soviet-list source, not independent corroboration. 'Accepted by a Soviet crew' places the handover on the US side (consistent with the veteran account in ev-11) but the port is unnamed. No asbestos content. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-02
-
[4]uboat.net Allied Warships, USS YMS-464 (YMS-464), 'Minesweeper of the YMS class' - ship data card [other_primary]
- Locator
- uboat.net/allies/warships/ship/9881.html data table
- Finding type
- vessel_history
- Finding
- Ship data card for this hull: built by Gibbs Gas Engine Co. (Jacksonville, Florida); ordered 16 November 1942; laid down 14 May 1943; launched 9 December 1943; 'Commissioned 13 Jun 1944'; end service 15 May 1945; 'Transferred to the USSR on 15 May 1945'; former name PCS-1432. No commanding officers listed.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1945
- Limitations
- Secondary reference (long-running private warship database). Corroborates NavSource on all shared dates and supplies the order date (16 Nov 1942) and explicit 'Commissioned' wording that NavSource renders as 'Completed'. No asbestos content. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-03
-
[5]Richard A. Russell, 'Project Hula: Secret Soviet-American Cooperation in the War Against Japan' (Naval Historical Center, 1997), Appendix: 'U.S. Navy Combatant Ships Transferred [at Cold Bay] May-September 1945' - verbatim web transcription on generalstaff.org [other_primary]
- Locator
- generalstaff.org/WW2/Pubs/HULA/Project_HULA.htm, Appendix table (YMS rows) and chapter narrative
- Finding type
- historical_record
- Finding
- CORRECTION against the natural wrong attribution: this hull's 15 May 1945 Soviet transfer was NOT a Project Hula / Cold Bay transfer. The NHHC-published appendix enumerates every combatant transferred at Cold Bay - 28 frigates, 24 Admirable-class minesweepers (AM), 30 LCI(L)s, 31 YMS-type motor minesweepers, 56 SC subchasers, 4 YR workshops - and YMS-464 appears nowhere in it (the Cold Bay YMS were YMS-143/-144/-428/-435/-145/-59/-38/-42/-75/-139/-178/-184/-216/-237/-241/-272/-273/-295/-260/-33/-85/-100/-266/-288/-301/-88/-180/-135/-332/-285/-287, receiving T-52x/T-58x/T-59x/T-60x/T-61x designations). YMS-464 instead received T-188 and joined the Black Sea Fleet - consistent with a direct Lend-Lease handover in US waters and an Atlantic transit (Soviet crew acceptance 'in America' per ev-02/ev-11; Sevastopol arrival 21 July 1945). Sister YMS-465 (T-187) and YMS-466 (T-192) made the same Black Sea passage; YMS-469 (T-186) went to the Soviet Northern Pacific Fleet.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945
- Population
- Soviet receiving crew (May 1945)
- Limitations
- Negative-presence reasoning: absence from the NHHC appendix excludes the Cold Bay channel but does not itself document where the handover occurred - the Atlantic route is inferred from the Black Sea Fleet destination and the 'accepted by a Soviet crew in America' accounts, not from a named transfer port. Cited text is a verbatim transcription of the official Naval Historical Center monograph on generalstaff.org (an unofficial host; the canonical history.navy.mil PDF URL was not located - candidate URLs 404; page returns 403 to plain curl but is live - full text retrieved via firecrawl). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-04
-
[6]NavalCoverMuseum wiki, 'YMS 464' - ship name and designation history; documented fake postmark; scrapped-in-1954 variant [museum_official]
- Locator
- navalcovermuseum.org/wiki/YMS_464, 'Ship Name and Designation History' and 'Postmarks' sections
- Finding type
- historical_record
- Finding
- Designation-history table confirms: keel laid 14 May 1943 as Patrol Craft Sweeper PCS-1432; reclassified YMS-464 27 September 1943; launched 9 December 1943; completed 13 June 1944; 'T-188 (Soviet Union Naval Service)'; transferred to the Soviet Union 15 May 1945; 'Scrapped in 1954.' The museum's postmark holdings document a Locy Type 'FAKE' (USCS catalog illus. Y-6, the YMS-111 fake type) postmark dated 1944-06-13 purporting to mark this hull - i.e., a fraudulent philatelic item exists and should not be cited as evidence of a 13 June 1944 commissioning ceremony.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1958
- Limitations
- Volunteer philatelic museum wiki (secondary). 'Scrapped in 1954' conflicts with the 28 January 1958 out-of-service/scrapping dates carried by NavSource and kchf.ru - logged in gaps, not resolved. The fake postmark is itself the documented artifact here (a correction item); genuine postal evidence of this hull's USN service was not located. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-05
-
[7]shipbuildinghistory.com, 'Gibbs Gas Engine, Aerojet-General, Jacksonville Shipyards' build table; cross-checked against the same site's Yard Minesweepers (YMS) table at shipbuildinghistory.njscuba.net/us-navy-small/ym/ [other_primary]
- Locator
- gibbs.htm rows 'PC 1432-1440' and 'YMS 464'/'YMS 465'/'YMS 466'/'YMS 469'; njscuba.net/us-navy-small/ym/ row 'YMS-464'
- Finding type
- historical_record
- Finding
- The Gibbs yard build table documents the contract block: 'PC 1432-1440, US Navy, Sub Chaser - Completed as YMS 464-472 (see below)' - i.e., all nine hulls of the PCS-1432 batch left the yard as YMS-464 through YMS-472. The same table gives YMS-464 delivery 13-Jun-44 and disposition 'To the USSR 1945 as T-190, scrapped 1954' - while the site's own Yard Minesweepers table at njscuba.net lists 'YMS-464 ... to the USSR (T-188) 1945.' The source is internally inconsistent on the Soviet designation (T-190 vs T-188); the T-188 identity is carried in this record because it is corroborated by NavSource, kchf.ru, and the Meister-derived T-number concordance (Axis History Forum compilation). T-190 in the corroborated concordance belongs to YMS-455. 'Scrapped 1954' likewise conflicts with the 1958 Soviet out-of-service date - both variants logged in gaps. Yard history: Gibbs Gas Engine Works founded 1911; prolific builder of engines and small wooden/steel vessels in both World Wars; renamed Gibbs Corporation post-war, sold to Aerojet-General 1964, Fruehauf 1969, Terex 1989, closed 1992; yard stood at the east end of Prudential Drive, Jacksonville.
- Verification
- disputed
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1945
- Population
- Gibbs yard workforce (1943-44)
- Limitations
- Secondary shipbuilding reference (Tim Colton's shipbuildinghistory), not a primary registry; internally inconsistent on this hull's Soviet designation and disposal year, so the row documents the conflict rather than resolving it. No asbestos content. Both URLs verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-06
-
[8]HyperWar/ibiblio transcription, 'Ships of the U.S. Navy, 1940-1945 - Minesweepers (YMS Motor Minesweepers)' - USN minecraft roster and class specifications [other_primary]
- Locator
- ibiblio.org/hyperwar/USN/ships/ships-dm.html, 'YMS -- Motor Minesweepers' narrative + roster row YMS-464
- Finding type
- vessel_history
- Finding
- YMS-464 appears in the official-derived roster of US Navy minecraft (1942-45 program column). Class-level data from the same source: 'The wood-hulled YMS proved to be one of the U.S. Navy's more durable and versatile types through a quarter-century of service... All 481 ships of this type had the same general characteristics'; silhouette variants - YMS-1 through 134 two stacks, YMS-135 through 445/480/481 one stack, 'YMS-446 through 479 had none' (this hull is a third-series, no-stack boat); originally rated as service craft, used in WWII for inshore sweeping ahead of amphibious assaults. Specs: 320 tons (full); 136'; 24'6" beam; 6'1" draft; 13 kts; 1x3"/50, 2x20mm, depth-charge tracks and projectors; complement 4 officers + 29 crew; diesel engines, twin screws.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1940-1945
- Limitations
- The roster entry is minimal (no dates beyond the '1942-5' program column) and class figures are type-level, not this hull's measured values (NavSource gives 270 t / 15 kts / cpl. 32). Confirms the wood hull and the third-series no-stack silhouette for YMS-464 specifically. No asbestos content. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-07
-
[9]Era inference built on: NavSource YMS-464 specifications (two GM 8-268A diesels, reduction gear, two shafts); HyperWar class data (wood-hulled, 481 built, 1940-45 service); kchf.ru class description (wooden construction material, magnetic/acoustic sweep gear); GAO HRD-80-2 (see ev-09) [other_primary]
- Locator
- NavSource 11/19464.htm specifications; HyperWar ships-dm.html class block; kchf.ru class description; GAO HRD-80-2
- Finding type
- asbestos_application
- Finding
- A wood-hulled, diesel-driven motor minesweeper built 1943-44 falls inside the Navy's documented asbestos-use era, but the exposure profile differs from steam vessels: with no steam plant there is no boiler/turbine lagging pathway, and the wooden hull removes the structural fireproofing pathway of steel construction. Era-standard applications aboard a small diesel minecraft of this period were engine-exhaust lagging, machinery insulation around the engine space, gaskets, valve packing, and electrical insulation. The asbestos-relevant populations are the Gibbs construction trades (1943-44), the brief USN crew (June 1944 - May 1945), and the Soviet crew and Black Sea Fleet maintenance personnel (1945-58) - the last in a documentation void for US-source purposes.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1958
- Population
- Gibbs construction trades (1943-44); USN crew (1944-45); Soviet crew and Black Sea Fleet yard personnel (1945-58)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or Soviet maintenance record located for YMS-464. Names era-standard applications, not confirmed installed materials; no quantity; no manufacturer attribution. Wood hull + diesel propulsion make the installed asbestos footprint plausibly small relative to steam combatants, but 'smaller' is not 'zero' and is not ship-proven either way.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-08
-
[10]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' block
- Finding type
- gov_survey
- Finding
- GAO reviewed the Navy's efforts to protect workers from asbestos exposure at the Long Beach and Norfolk Naval Shipyards, covering the use of asbestos in Navy ships, removal costs, and compensation programs; it documents that the Navy used asbestos insulation aboard ships and that the 1975 policy was to remove/replace only damaged insulation or insulation removed for repairs, modified in 1979 to selective replacement in high-maintenance areas - i.e., the Navy's asbestos era spans this hull's entire US-construction and US-service window (1943-45).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- 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. Product-page description used - gao.gov returns HTTP 403 to plain fetches (confirmed 2026-10-04); page content retrieved via firecrawl. The surveyed yards (Long Beach, Norfolk NSY) have no documented connection to this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-09
-
[11]Batch-8350 search ledger (this record): NavSource; uboat.net; kchf.ru; NavalCoverMuseum; shipbuildinghistory.com + njscuba mirror; NHHC Project Hula appendix transcription; HyperWar minecraft roster; GAO product page; NHHC DANFS/NVR/photo-archive checks; secondary web asbestos/litigation sweep; CourtListener (blocked) [other_primary]
- Locator
- search_ledger rows sl-uss-yms-464-01 through -19
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS YMS-464 / PCS-1432 / T-188 was found in the public sources searched. There is no DANFS entry for either designation, no NVR record (pre-1987 disposal), no museum artifact or preservation record (hull scrapped in the USSR), and the secondary 'YMS-464 asbestos' sweep returned only generic regulatory/marketing content - even the law-firm listicle class did not generate a page for this hull. CAVEAT: CourtListener could not be queried this session - the fleet pacing limiter returned 'budget momentarily spent' on every attempt; logged as blocked in search_ledger, not as a negative result.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - and the litigation repository search is a genuine open gap (throttled, not run). The 1944-45 USN service window and the 1945-58 Soviet window leave deck logs (RG 24, undigitized), BuShips work packages, and Soviet-era Central Naval Archive records as undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-10
-
[12]Vladimir Pelevin blog (St. Petersburg naval-history blogger), post on krasnoflotets Andrey Maksimovich Chelyadinov (b. 1922), crewmember of T-188 - family inquiry and archival-document lead [other_primary]
- Locator
- vladimir-pelevin.blogspot.com 2020-05 post, quoted daughter's inquiry paragraph
- Finding type
- historical_record
- Finding
- A named Soviet sailor is documented as a T-188 crewmember: Andrey Maksimovich Chelyadinov (b. 1922, s. Donskoe, Voronezh oblast), whose daughter reports he 'received the minesweeper T-188 in America (note: USS YMS-464)' - placing the 15 May 1945 handover on the US side. The post states his service documents are posted in the Russian state military-memory archives 'Podvig Naroda' and 'Pamyat Naroda' under spelling variants (Chelyadinov/Chelyadimov/Cheledinov) - an archival lead for the Soviet receiving-crew population.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945
- Population
- Krasnoflotets A. M. Chelyadinov and the Soviet receiving crew (1945)
- Limitations
- Private blog repeating a family's account - human-history lead only, not an official source; it corroborates (does not establish) the US-side handover. No asbestos content and no exposure claim is made for the individual. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-11
-
[13]SeWar.ru ('Soviet Weapons of World War II' encyclopedia), 'Tip YMS. T-188 (do 25.10.1944 g. YMS-464)' - Soviet fleet-list data for this hull (Russian-language secondary compilation) [other_primary]
- Locator
- sewar.ru/tralschiki/1392 - page title and one-paragraph ship-history block
- Finding type
- vessel_history
- Finding
- Independent-appearing second Russian compilation carrying the same Soviet-list record: page titled 'T-188 (until 25.10.1944 "YMS-464")' - corroborating the Soviet designation-allocation date; 'laid down 14.05.1943 (Jacksonville, USA), launched 9.12.1943, entered service 13.06.1944. On 15.05.1945 accepted by a Soviet crew against Lend-Lease deliveries, on 21.07.1945 arrived at Sevastopol and on 4.08.1945 included in the Black Sea Fleet. On 28.01.1958 disarmed and excluded from the Navy list in connection with transfer to the stock-property department.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1958
- Population
- Soviet crew and Black Sea Fleet personnel (1945-58)
- Limitations
- The service-history text is verbatim-identical to kchf.ru (ev-02) - both compilations clearly draw on the same underlying Soviet fleet-list source, so this is corroboration of that shared record, not an independent source. Confirms the T-188/YMS-464 identity, the 25 Oct 1944 designation date, the 21 Jul 1945 Sevastopol arrival, and the 28 Jan 1958 OFI disposal. No asbestos content. Verified live 2026-10-04 (HTTP 200).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-464-12