Evidence
13 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-13).
-
[1]research packet 1075-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (thin sourcing disclosed)
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Limitations
- qualifier: VERIFIED (thin sourcing disclosed)
- Evidence ID
- uss-yms-66-yms66-pkt-1075-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-66 page - milestone chronology, specifications, call sign [other_primary]
- Locator
- NavSource 11/19066.htm header block and specifications block
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 22 July 1941 by the Weaver Brothers Shipyards, Orange, TX; launched '31 September 1941' (an impossible calendar date - see gaps); completed 30 June 1942; struck from the Naval Register 1 May 1946; transferred to the War Shipping Administration in July 1947; 'Fate unknown.' Call sign Nan - Item - Fox - Able. Specifications: displacement 270 t.; length 136'; beam 24' 6"; draft 8'; speed 15 kts.; complement 32; armament one 3"/50 dual purpose gun mount, two 20mm mounts, two depth charge projectors; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Page notes explicitly: 'There is no DANFS history available for YMS-66' and no photograph of the vessel is available.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Weaver construction trades (1941-42); crew (1942-46)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry; its milestone dates generally track NVR/DANFS-era registers. The printed launch date '31 September 1941' is a calendrical impossibility - carried as a conflict in gaps rather than adopted. Contains no asbestos content. No DANFS entry exists for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-01
-
[3]uboat.net Allied Warships, USS YMS-66 (YMS-66) - construction and milestone table [other_primary]
- Locator
- uboat.net ship/9486 data table
- Finding type
- vessel_history
- Finding
- uboat.net warship table for this hull: ordered 1 April 1941; built by Weaver Shipyards (Orange, Texas); laid down 22 July 1941; launched 30 September 1941; commissioned 30 June 1942; stricken 1 May 1946. No commanding-officer or operational-event entries are recorded for this vessel.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Population
- Weaver construction trades (1941-42); crew (1942-46)
- Limitations
- Secondary database (Guomundur Helgason's Allied Warships) - its data for US small craft derives from official register data but is not the register itself. Its 30 September 1941 launch date conflicts with the 31 January 1942 date carried by the Texas Historical Commission marker and local press - see gaps; the NavSource '31 September 1941' is likely a corrupted form of this same date. 'Commissioned' vs NavSource 'Completed' on 30 June 1942 is noted in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-02
-
[4]Shipbuilding History (T. Colton), Weaver Shipyards Orange TX production list (live); plus the Shipbuilding History Yard Minesweepers fleet table (archived Wayback capture - live njscuba mirror rejects automated fetch) [other_primary]
- Locator
- shipbuildinghistory.com/shipyards/small/weaver.htm production table (YMS 66 row; verified live); Yard Minesweepers table via Wayback capture web.archive.org/web/20100413220221/shipbuildinghistory.com/history/smallships/yms.htm (njscuba.net mirror returns 406 to automated fetch)
- Finding type
- vessel_history
- Finding
- The Weaver Shipyards hull list records YMS 66, US Navy, minesweeper, 278 GT, delivered 30 June 1942, 'Struck 1946' - corroborating the completion and striking milestones. The Yard Minesweepers table lists her as a Mk. I YMS built at Weaver Shipyard, Orange TX, 30-Jun-42, 'Struck 1946, disposition unknown.' The same production list shows this hull was one of a first Weaver block of wooden minesweepers (YMS 66 through YMS 75) plus two subchasers (SC 666, SC 667), and documents sister-boat fates (YMS 69 to France 1944 as Marjolaine; YMS 70 lost in a storm off Leyte 1944; YMS 71 mined off Borneo 1945; YMS 75 to USSR 1945 as T-590).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Weaver construction trades (1941-42)
- Limitations
- Secondary compiled production list - delivery dates track official register data but the list is not itself the register; no hull/yard number assigned to YMS 66 in the table. Yard-history framing (1897 founding, 1941 renaming to Weaver Shipyards) consistent with the Texas Historical Commission marker. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-03
-
[5]Texas Historical Commission marker 'Weaver Shipbuilding' (erected 2008; text transcribed at Historical Marker Database); corroborated by Orange Leader local-history coverage (2021) [other_primary]
- Locator
- hmdb.org marker m=116231 full marker text; orangeleader.com 2021-04-21 article
- Finding type
- vessel_history
- Finding
- The Texas Historical Commission marker for Weaver Shipbuilding records: 'The first minesweeper, YMS 66, was launched on January 31, 1942.' The marker documents the yard as Joseph Weaver and Son Shipyard (est. 1897), renamed Weaver Shipyards on L. E. Weaver's death in 1941, with wartime contracts for wooden minesweepers and subchasers 'awarded in 1941 and 1942,' the vessels 'made of wood as wood did not attract the magnetic mines.' The Orange Leader (21 April 2021) independently carries the same launch date, noting 245 workers at the yard at the start of the war and a first contract for ten minesweepers.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1897-1942 (marker scope); launch date 1942
- Population
- Weaver construction trades (1941-42)
- Limitations
- The marker text and the local-press account draw on the same local-history record and are not fully independent. The 31 January 1942 launch date conflicts with the register-derived 'September 1941' dates (see gaps) but fits the documented launch sequence of the Weaver sister boats (YMS-67 launched 17 February 1942; YMS-68 24 February 1942; YMS-71 26 March 1942). hmdb.org is a volunteer transcription site; the marker itself is a state-commission historical marker. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-04
-
[6]East Carolina University Digital Collections, East Carolina Manuscript Collection, Daniel K. Hargan Papers (0700-b1-fa), 'Letter from Daniel K. Hargan to Helen' (11 June 1943) [museum_official]
- Locator
- digital.lib.ecu.edu/36529 item description field
- Finding type
- historical_record
- Finding
- The institutional catalog description for a 1943 letter of Seaman 2nd Class Daniel K. Hargan (b. 1923, Rochester, NY) states: 'Most of his tour of duty was in the Atlantic aboard the USS YMS 66, an auxiliary motor minesweeper, headquartered in the Panama Canal Zone.' This is the only located source describing this hull's wartime operating area: Atlantic-side service with headquarters in the Panama Canal Zone.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-1945
- Population
- YMS-66 crew including S2c Daniel K. Hargan (1942-45); Panama Canal Zone base population
- Limitations
- The description is the repository's own catalog metadata for the Hargan papers, not a Navy service record; it documents where a named individual's service aboard this hull took place, not the hull's orders. It does not establish dates of assignment, specific patrol areas, or any exposure condition.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-05
-
[7]U.S. Navy WWII campaign-participation credit, reproduced by officialmilitaryribbons.com: 'YMS 66: 8 Nov 45 - 15 Dec 45 | P207 | Minesweeping Operations Pacific' [other_primary]
- Locator
- officialmilitaryribbons.com YMS 1-200 campaign table, YMS 66 entry; P207 area breakdown on the same site
- Finding type
- historical_record
- Finding
- The Navy's WWII campaign-participation list credits YMS-66 with one operation: 8 November - 15 December 1945, P207 'Minesweeping Operations Pacific' - the post-surrender clearance of Japanese-laid and defensive minefields in Japanese home-water approaches (the campaign covered Tsugaru, Tokyo Bay, Nagoya, Kobe, Kure, Fukuoka, and other designated areas, August 1945 - March 1946). This places the hull in Pacific minesweeping service after V-J Day, consistent with the fleet-wide employment of YMS-type craft in post-war clearance (e.g., the 36-ship YMS flotilla in the Kobe operation).
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-11-08 to 1945-12-15
- Population
- YMS-66 crew, post-surrender minesweeping force (Nov-Dec 1945)
- Limitations
- The cited page is a commercial vendor's transcription of the Navy's official campaign-credit table - the underlying list is authoritative Navy data, but this transcription is secondary and gives only the aggregate campaign label (P207), not the specific P207 sub-area in which YMS-66 operated. The credit postdates the NARA deck-log coverage ending 30 September 1945 (see gaps). No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-06
-
[8]NARA, Logbooks of U.S. Navy Ships and Stations (NAID 594258, RG 24) - YMS-66 deck-log holdings inventoried covering 1 July 1942 - 30 September 1945 [other_primary]
- Locator
- archives.gov/research/military/logbooks/navy-online (deck-log availability page); catalog.archives.gov series 594258 search-within query 'YMS-66' (no matching file units)
- Finding type
- historical_record
- Finding
- NARA inventories US Navy deck logs for YMS-66 covering 7/1/1942 - 9/30/1945 (the hull's entire active-service window from completion through the end of the Pacific war). The logs are held in the Logbooks of U.S. Navy Ships and Stations series but the YMS-66 file units are not digitized in the National Archives Catalog - a search-within-series query for 'YMS-66' returns no ship-matched file units. The logs are the open lead for confirming her Canal Zone operating area, commanding officers, and daily activity.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1942-07-01 to 1945-09-30
- Population
- YMS-66 crew (1942-45); 15th Naval District / Panama Canal Zone
- Limitations
- Archival lead only - coverage dates are from NARA's deck-log inventory listing for this vessel; the item-level catalog record could not be fetched this session (catalog.archives.gov is JS-rendered). Coverage ends 30 September 1945 although the hull's credited service continued into December 1945 - whether post-September 1945 logs exist is unresolved (see gaps). Deck logs record events and personnel, not materials - they contain no asbestos data as such.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-07
-
[9]Era inference built on: NavSource specification block for this hull (wooden-hulled YMS-1 class; two GM 8-268A diesels, reduction gear, two shafts); Shipbuilding History YMS table (561 wooden-hulled boats of one design; Mk I subclass); Texas Historical Commission marker ('made of wood as wood did not attract the magnetic mines'); GAO HRD-80-2 (see ev-uss-yms-66-yms66-09) [other_primary]
- Locator
- NavSource 11/19066.htm specification block; shipbuildinghistory.njscuba.net/us-navy-small/ym/; hmdb.org m=116231
- Finding type
- asbestos_application
- Finding
- YMS-66 was a wooden-hulled, diesel-powered auxiliary motor minesweeper - a materially different asbestos profile from steam vessels: no boilers, no turbines, no steam lines, so the dominant boiler/turbine-lagging pathway of larger combatants does not apply. Era-standard applications aboard a diesel craft of this size and period were confined to diesel-exhaust lagging, machinery gaskets and valve packing, electrical insulation, and winch/windlass brake linings. Her wooden hull itself carried no structural asbestos content.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1941-1946
- Population
- Weaver construction trades (1941-42); crew (1942-46); any post-war civilian owner/operators (1947-)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for YMS-66. Names era-standard applications, not confirmed installed materials. No quantity. Wooden-hull construction materially narrows the plausible application set relative to steam ships; this record asserts no ship-specific asbestos presence.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-08
-
[10]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2
- 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 (1941-42) and service era (1942-46).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- 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 has blocked automated fetch in prior batch sessions, HTTP 403); content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-09
-
[11]EPA CERCLA site profile, Weaver Shipyard, 1601 S. Childers, Orange, TX 77630 (EPA ID TXD988083853) [other_primary]
- Locator
- cumulis.epa.gov CERCLA site info page id=0622060
- Finding type
- environmental_record
- Finding
- The builder yard of this hull is a CERCLA-evaluated site: EPA records Weaver Shipyard, 1601 S. Childers, Orange, TX (Region 6, Orange County) as 'Not on the NPL' with non-NPL status 'NFRAP - Site does not qualify for the NPL based on existing information.' The site remains in maritime use under Weaver-family land ownership (yard operations sold 1975).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- site assessment era (NFRAP); yard history 1897-present
- Population
- Weaver yard workforce and neighbors (site-level, all eras)
- Limitations
- Yard-level environmental record, not a hull record - documents that the construction site was CERCLA-assessed and found not to qualify for the NPL; the public profile does not enumerate contaminants and makes no asbestos statement. The OSHA inspection history for 'Weaver Shipyard & Drydock Inc' (1975-84; machinery-guarding, woodworking, painting, lighting violations - no asbestos citations listed) postdates the construction era. Does not establish materials aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-10
-
[12]NARA Guide to Federal Records, Record Group 248 (Records of the War Shipping Administration): 'Abolished: September 1, 1946, by the Naval Appropriations Act (60 Stat. 501), July 8, 1946' [other_primary]
- Locator
- archives.gov RG 248 administrative history; 50 U.S.C. ch. 57 note (WSA termination text)
- Finding type
- historical_record
- Finding
- CORRECTION: NavSource records this hull 'Transferred to the War Shipping Administration in July 1947' - but the War Shipping Administration was abolished effective 1 September 1946 (Naval Appropriations Act, 60 Stat. 501), its functions passing to the U.S. Maritime Commission for liquidation (September - December 1946). A July 1947 disposal could not have been executed by WSA itself; the Maritime Commission - WSA's liquidating successor, which disposed of surplus tonnage under the Merchant Ship Sales Act - is the agency that would have received this hull. Secondary compilations conventionally label this disposal pipeline 'WSA' despite the agency no longer existing.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1946-1947
- Limitations
- Corrects the receiving-agency name in the disposal milestone, not the fact or date of transfer: stricken vessels of this class were routinely handed to maritime disposal authorities in 1946-48. The July 1947 date itself rests on secondary compilation (NavSource); no primary transfer document was located. The hull's ultimate disposition after transfer remains unknown.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-11
-
[13]Batch-9147 search ledger (this record): NavSource; uboat.net; Shipbuilding History production lists; Texas Historical Commission marker; ECU Digital Collections; Navy campaign-credit transcription; NARA deck-log inventory; EPA CERCLA; NARA RG 248 guide; CourtListener (3 of 4 base queries + 1 asbestos-variant completed; 2 queries blocked by fleet pacing); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-66-yms66-01 through -18
- 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-66 was found in the public sources searched. CourtListener opinion searches for 'USS YMS-66' (6 hits) and 'YMS-66' (171 hits) surfaced only lexical false matches - Texas and New York state-court records whose scanned text produces 'YMS-66' token collisions; no vessel reference, no asbestos content. The 'USS YMS-66' docket search overflowed (1,862 loose matches, top page unrelated); its asbestos-qualified variant (241 loose matches) surfaced only the general asbestos-products-litigation pool (In re Asbestos MDL VI, A.W. Chesterton and Air and Liquid Systems dockets) - no case caption names this vessel. CAVEAT: the 'YMS-66' docket base query and the 'YMS-66 asbestos' opinion variant could not be run - CourtListener fleet pacing refused the requests across ~16 attempts spanning ~50 minutes; logged as blocked, not negative results. Secondary web sweeps found only law-firm marketing content asserting asbestos aboard WWII-era ships generically - excluded by source policy. No DANFS history exists for this hull.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - it records that no public ship-specific documentation was found, and the litigation search is partially incomplete (two CourtListener queries blocked by fleet pacing; a hull mention inside an unindexed docket pleading cannot be excluded). Deck logs (NARA, undigitized) and any Maritime Commission disposal file are the open archival leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-66-yms66-12