Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
-
[1]research packet 962-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing)
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing)
- Evidence ID
- uss-yms-453-pkt-962-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-453 (ex-PCS-1406) - designation timeline, specifications, disposal (page verified live 2026-10-04) [other_primary]
- Locator
- NavSource 11/19453.htm header block and specifications block
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 20 July 1943 as Patrol Craft Sweeper PCS-1406 by Greenport Basin and Construction Co., Greenport, NY; reclassified as Auxiliary Motor Minesweeper YMS-453 on 27 September 1943; launched 2 October 1943; completed 27 June 1944; transferred to the Soviet Union under lend lease 24 May 1945 and reclassified T-189; assigned to the Black Sea Fleet 4 August 1945; placed out of service 18 December 1954; reclassified as degaussing ship SBR-123 on 12 January 1955; scrapped 2 June 1959. Specifications: 270 t.; 136' length; 24'6" beam; 8' draft; 15 kts; complement 32; armament one 3"/50 dual-purpose mount, two 20mm mounts, two depth-charge projectors; propulsion two 880 bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Call sign Nan-Queen-Victor-Fox. Page states 'There is no DANFS history available for YMS-453.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1959
- Population
- Greenport construction trades (1943-44); US Navy crew (~32, 1944-45); Soviet Navy crew (1945-54)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates are corroborated by uboat.net, shipbuildinghistory, and Soviet-side records (ev-02, ev-03, ev-04). 'Completed 27 June 1944' is carried as the commissioning-equivalent date; uboat.net labels the same date 'Commissioned'. Page contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-01
-
[3]uboat.net Allied Warships, USS YMS-453 (YMS-453) - build/milestone table (page verified live 2026-10-04) [other_primary]
- Locator
- uboat.net ship/9870.html data table
- Finding type
- vessel_history
- Finding
- uboat.net record for this hull: ordered 16 November 1942; built by Greenport Basin and Construction Co., Greenport, Long Island, New York; laid down 20 July 1943; launched 2 October 1943; commissioned 27 June 1944; end service 24 May 1945 - transferred to the USSR; former name PCS-1406. No commanding officers are listed for this vessel.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1945
- Population
- Greenport construction trades (1943-44); US Navy crew (1944-45)
- Limitations
- Specialist secondary database (Guomundur Helgason's Allied Warships); corroborates NavSource on every shared milestone and adds the contract order date. 'Commissioned 27 Jun 1944' vs NavSource 'Completed' - same date, carried as commissioning. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-02
-
[4]KCHF.RU (Black Sea Fleet history site), 'Tralshchik T-189 Chernomorskogo Flota' - Soviet-side service record for ex-YMS-453 (Russian-language page verified live 2026-10-04); corroborated by sewar.ru T-189/SBR-123 entry [other_primary]
- Locator
- kchf.ru/ship/tral/t189.htm history section and specifications block; corroboration http://www.sewar.ru/tralschiki/1393-tip-yms-t-189-do-25101944-g-yms-453-s-12011955-g-sbr-123.html
- Finding type
- vessel_history
- Finding
- Soviet-side record for this hull: patrol minesweeper PCS-1406 laid down 20 July 1943 at Greenport Basin and Construction Co., Greenport, USA; reclassified as Auxiliary Motor Minesweeper and renamed YMS-453 on 27 September 1943; launched 2 October 1943; entered service 27 June 1944. On 25 October 1944 the ship was assigned the new name T-189 (pre-transfer Soviet designation). On 24 May 1945 the ship was accepted by a Soviet crew against lend-lease deliveries; arrived Sevastopol 21 July 1945; included in the Black Sea Fleet 4 August 1945. Withdrawn from combat composition 18 December 1954, disarmed, and converted to a degaussing station (SBR-123 from 12 January 1955); removed from the Soviet Navy list 2 June 1959 for transfer to the stock-property department. Soviet-side specifications: displacement 320 t; 41.45 x 7.46 x 3.87 m; 12 knots; range 2,030 miles at 9.2 knots; two General Motors 8-268A diesels of 880 hp, two shafts; one 76.2-mm gun, two 20-mm mounts, two bomb throwers, two bomb racks, one trawl; complement 33.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1959
- Population
- Soviet Navy crew, Black Sea Fleet (1945-54); Soviet auxiliaries (1955-59)
- Limitations
- Russian-language specialist secondary source (kchf.ru, corroborated by sewar.ru); Soviet-side figures differ slightly from US sources (320 t vs 270 t displacement; 33 vs 32 complement; 12 vs 15 knots - differing measurement conventions, see gaps). The T-189 designation date of 25 October 1944 (pre-transfer) vs NavSource's reclassification-at-transfer on 24 May 1945 - designation assignment vs physical transfer, see gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-03
-
[5]Shipbuilding History (shipbuildinghistory.njscuba.net), Greenport Basin & Construction Co. yard output table and yard history (page verified live 2026-10-04) [other_primary]
- Locator
- Greenport yard table, PCS-1406 row; yard-history paragraph
- Finding type
- vessel_history
- Finding
- Yard output table for this hull's builder: PCS-1406, US Navy, type 'subchaser', 278 d.t., 136 ft, delivered 27 June 1944 - annotated 'completed as YMS-453, to the USSR 1945 as T-189, SBR-123 1958, struck 1959'. Yard history: Greenport Basin & Construction Company was started in the mid-19th century by Pliny C. and Theodore W. Brigham, building fishing vessels and yachts; during WWII they acquired their neighbor Greenport Shipyard Company and expanded into steel boatbuilding; the yard survives as Greenport Yacht & Shipbuilding Company.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1944
- Population
- Greenport Basin construction trades (1943-44)
- Limitations
- Secondary yard-output compilation; 'SBR-123 1958' conflicts with the 12 January 1955 conversion date carried by NavSource and Soviet-side records (see gaps). Labels the contract hull 'subchaser' though it was reclassified to minesweeper pre-launch (see ev-09). No asbestos content; Greenport Basin is not an Atlas shipyards.json entry.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-04
-
[6]Era inference built on: NavSource YMS-453 spec block (two GM 8-268A diesels, two shafts - no steam plant); NavSource Auxiliary Minesweeper class index and shipbuildinghistory YM page (wooden-hulled YMS type; 561 built at 35 yacht/boatyards); NavSource/Wikipedia class silhouette data (YMS-446 through -479 carried no stack) [other_primary]
- Locator
- NavSource 11/19453.htm specifications block; NavSource 11/19idx.htm class-index text; shipbuildinghistory.njscuba.net/us-navy-small/ym/ class summary
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered minesweeper completed June 1944 sits inside the Navy's documented asbestos era. Era-standard applications aboard a small diesel combatant of this period were machinery and diesel-exhaust lagging, gaskets, valve packing, and electrical insulation. As a diesel vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - and her wooden hull carried none of the structural thermal insulation of a steel-hulled steam ship; her asbestos-relevant footprint was correspondingly narrower.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1959
- Population
- Greenport construction trades (1943-44); US Navy crew (1944-45); Soviet Navy crew (1945-54)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-453. Names era-standard applications, not confirmed installed materials. No quantity. No manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-05
-
[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 construction (1943-44) and US service era (1944-45).
- 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. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, confirmed 2026-10-04) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-06
-
[8]NavSource Auxiliary Minesweeper class index (class history text); shipbuildinghistory Yard Minesweepers (YM) page; Wikipedia 'Auxiliary motor minesweepers' (secondary cross-check only) [other_primary]
- Locator
- NavSource 11/19idx.htm class-index text; shipbuildinghistory.njscuba.net/us-navy-small/ym/ intro; en.wikipedia.org/wiki/Auxiliary_motor_minesweepers
- Finding type
- vessel_history
- Finding
- Class context for this hull: auxiliary motor minesweepers were small wood-hulled minesweepers commissioned for WWII service, numbered but unnamed, built at 35 yacht/boatyards rather than larger shipyards; 561 hulls were produced 1942-45. The only significant variation within the type was appearance - YMS-1 through -134 had two stacks, YMS-135 through -445 (plus -480/-481) had one, and YMS-446 through -479 had none; YMS-453 falls in the no-stack Mk III group. Surviving YMSs were reclassified AMS in 1947 and MSC(O) in 1955; roughly 45 went to the Soviet Union in 1945, most of them through the Cold Bay Project Hula pipeline to the Pacific Fleet.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1941-1969 (type history)
- Limitations
- Class background only; YMS-453's transfer was NOT a Project Hula movement - she went to the Black Sea Fleet via Sevastopol (arrival 21 July 1945), a different lend-lease path than the Pacific-bound Cold Bay transfers (Wikipedia's Hula ship list does not include T-189). The 'YMS-446 through -479' no-stack range is NavSource's; shipbuildinghistory carries 'YMS-446-481' for the Mk III - immaterial to this hull. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-07
-
[9]Batch-8324 search ledger (this record): NavSource; uboat.net; kchf.ru; sewar.ru; shipbuildinghistory Greenport and YM pages; NHHC DANFS (no entry - DANFS covered named ships only); NVR (pre-1987 disposal exclusion); CourtListener opinion and docket indexes; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-453-01 through sl-uss-yms-453-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS YMS-453 / PCS-1406 / T-189 was found in the public sources searched. CourtListener authenticated searches returned zero hits in the opinion index for 'USS YMS-453' and 'YMS-453' and zero hits in the docket index for 'USS YMS-453'; the 'YMS-453' docket query could not be completed before session close (fleet-wide pacing limiter) and is logged as blocked, not a negative result. No DANFS entry exists for this hull - DANFS covered commissioned ships with assigned names, and this craft was numbered but unnamed. NVR carries no entry - ships disposed prior to 1987 are not in the register.
- 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 one of four mandatory CourtListener base queries remains unrun (pacing-blocked, not a negative result); litigation status is open on that index. US-service deck logs and Soviet-era disposal records are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-08
-
[10]Designation cross-check: NavSource designation line ('ex-PCS-1406', reclassified 27 Sep 1943); uboat.net 'Former name: PCS-1406'; kchf.ru reclassification date 27.09.1943 and T-189 naming 25.10.1944; shipbuildinghistory 'completed as YMS-453' [other_primary]
- Locator
- NavSource 11/19453.htm designation line; uboat.net ship/9870 'Former name' field; kchf.ru/ship/tral/t189.htm history section; shipbuildinghistory Greenport table
- Finding type
- historical_record
- Finding
- CORRECTION: sources styling this vessel 'ex-PCS-1406' or giving her 'former name PCS-1406' describe a pre-launch reclassification, not commissioned service. She was laid down 20 July 1943 under the PCS-1406 contract designation and reclassified to Auxiliary Motor Minesweeper YMS-453 on 27 September 1943 - five days before launch (2 October 1943). She was completed, commissioned, and served only as YMS-453; she never operated as PCS-1406. Separately, the T-189 designation predates physical transfer: Soviet-side records date her naming to T-189 on 25 October 1944 while US-side records carry reclassification at transfer on 24 May 1945 - designation assignment vs crew acceptance.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1945 (designation window)
- Limitations
- Corrects a circulating designation implication ('ex-PCS-1406' reads as prior service), not a material asbestos claim. The dual T-189 dates are reconciled as designation-vs-transfer but rest on secondary sourcing both sides. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-453-09