Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 1051-packet.md (5 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-317-yms317-pkt-1051-packet-md
-
[2]DANFS, Grosbeak IV (YMS-317 / AMS-14) - construction, WWII Pacific service, postwar training-ship career, 1947 renaming, disposal (verbatim transcription; live NHHC DANFS page returned 404) [nhhc_danfs]
- Locator
- DANFS Grosbeak IV service narrative and spec block
- Finding type
- vessel_history
- Finding
- Documented for this hull: launched as YMS-317 by the South Coast Co., Newport Beach, Calif., 27 February 1943; sponsored by Mrs. Marjorie Boutelle; commissioned 18 November 1943, Lt. John B. Warner in command. After shakedown, swept the San Francisco Bay area until 3 May 1944, then sailed for Pearl Harbor; in the Pacific acted as escort vessel to convoys in back and staging areas - Eniwetok, Saipan, Kwajalein - as well as patrolling and minesweeping. Returned to Pearl Harbor post-war for overhaul; reached Charleston, S.C. via San Pedro and the Panama Canal June 1946 and again underwent overhaul; named Grosbeak and redesignated AMS-14 18 February 1947. Post-war career mostly at the Mine Warfare School, Yorktown, Va., and the Naval Minecraft Base at Charleston as a training ship; experiments at the Naval Mine Countermeasures Station, Panama City, Fla.; exercises along the coast from New England to the Gulf of Mexico; Operation PORTEX in the Caribbean out of Vieques Island, P.R., 24 February - 19 March 1950; February 1951 first of her type Yorktown to Charleston via the intracoastal waterway. Battle Efficiency 'E' 1950, 1951, and 1952. Sailed to Green Cove Springs, Fla. 16 November 1955 (DANFS transcription reads 'Green Springs Cove'); decommissioned there 7 December 1955; hulk approved for disposal 27 October 1959; name struck from the Navy List 1 November 1959. Spec block: 'YMS-317: dp. 270; l. 136'; b. 25'; dr. 8'; s. 15 k.; cpl. 32.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1959
- Population
- South Coast Co. construction trades (1942-43); crew (1943-55)
- Limitations
- Ship-specific history only; no asbestos or material content. DANFS does not mention the 2 January 1947 decommissioning or the 7 February 1955 MSC(O)-14 reclassification carried by NavSource - the entry's narrative implies continuous service as a training ship (see gaps). Live NHHC DANFS page returned 404 on 2026-10-04 (grosbeak-iv.html and grosbeak.html); verbatim transcription via the losthistory.net hazegray mirror used, consistent with standing NHHC link-rot noted since Batch 01.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-01
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[3]NavSource Online: Mine Warfare Vessel Photo Archive, Grosbeak (MSC[O] 14) ex-AMS 14 ex-YMS-317 (11/19317) - designation timeline, specifications, commanding officers, post-Navy disposition [other_primary]
- Locator
- NavSource 11/19317.htm header block, specifications block, commanding-officers list, photo captions
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 30 October 1942 as YMS-317 by the South Coast Co., Newport Beach, CA; launched 27 February 1943; commissioned USS YMS-317 18 November 1943; decommissioned 2 January 1947; named Grosbeak and reclassified Motor Minesweeper AMS-14 18 February 1947; reclassified Coastal Minesweeper (Old) MSC(O)-14 7 February 1955; decommissioned 7 December 1955 at Green Cove Springs, FL; struck from the Navy Register 1 November 1959; acquired in 1961 by Marine Acoustical Services, Inc. of Miami, FL for use as a research vessel and renamed Paul Langevin - Marine Acoustical was under contract with the Military Sealift Command to conduct underwater sound research in the Labrador Basin for the Naval Underwater Systems Center, Newport, RI; out of documentation in 1963; fate unknown. 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. Commanding officers listed: LT John B. Warner USNR (18 Nov 1943), LT G. A. Cope Jr. USNR (1945), LTJG Wyatt Eugene Harper Jr. USN (1950-Jun 1952), LTJG James Lloyd Moss USN (Jun 1952-May 1953), LT Cyril J. Hartman Jr. USNR (May 1953). NHHC photo L45-112.04.01 shows YMS-317 with USS Knapp (DD-653) and USS Ingersoll (DD-652), possibly at Norfolk.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1963
- Population
- South Coast Co. construction trades (1942-43); crew (1943-55); reserve-fleet caretakers Green Cove Springs (1955-59); Marine Acoustical Services crew (1961-63)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track NVR/DANFS but the 2 January 1947 decommissioning is a NavSource-only entry absent from DANFS, whose narrative implies continuous service (see gaps). Beam figure conflicts with DANFS (24'6" vs 25'); engine rating conflicts with class-level sources (880 vs 440 bhp). Contains no asbestos content. The 1961 Paul Langevin conversion and 1963 out-of-documentation date rest on this single source - corroborated only indirectly (shipscribe.com documents a later RV Paul Langevin II operated by the same firm).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-02
-
[4]National Archives, Special List 44: List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 - numbered-vessels volume (sl-44-ship-number.pdf), page 118 [other_primary]
- Locator
- sl-44-ship-number.pdf page 118, row 'YMS-317 11/18/1943 6/30/1945'
- Finding type
- historical_record
- Finding
- NARA Special List 44 inventories deck logs for this hull: the entry 'YMS-317, 11/18/1943 - 6/30/1945' appears on page 118 of the numbered-vessels volume (verified directly in the published PDF). The log run begins on the DANFS-documented commissioning date and covers her San Francisco Bay sweeping duty and the first year of Pacific escort/minesweeping service.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1945 (log coverage)
- Population
- YMS-317 crew, Nov 1943 - Jun 1945
- Limitations
- Archival lead only: establishes that deck logs exist in NARA custody for 11/18/1943 - 6/30/1945, not their content - the logs are not digitized and were not read. Log coverage is not a commissioning/decommissioning date assertion. The NARA catalog (catalog.archives.gov) is JS-rendered and could not be fetched this session; whether the run continues past 6/30/1945 in another series was not verified.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-03
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[5]Shipbuilding History (navalmarinearchive.com mirror), 'Yard Minesweepers (YMS)' class page and build table [other_primary]
- Locator
- navalmarinearchive.com/sbh/smallships/ym.html intro paragraph and build table row YMS-317
- Finding type
- vessel_history
- Finding
- Class context: in 1942-45 '35 boatyards turned out 561 wooden-hulled minesweepers' of essentially one design, 136 feet long; the Mk. II subgroup (YMS 135-445) had one stack - this hull's subclass. The build table carries the hull row: 'YMS 317 | South Coast Shipbuilding | Newport Beach CA | 136 | 320 | 18-Nov-43 | Reclassified 1947 as Grosbeak (AMS 14), struck 1959.' Wooden construction is the class-defining feature - built at yacht/boat yards for nonmagnetic minesweeping.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1942-1945 (class production run)
- Population
- Construction trades at 35 boatyards (1942-45)
- Limitations
- Class-level secondary compilation confirming builder and wooden-hulled design; the tonnage column reads 320 (loaded) vs DANFS 270 - carried as a spec conflict, DANFS figure used. Live shipbuildinghistory.njscuba.net pages returned HTTP 500 this session; cited via the navalmarinearchive.com mirror of the same Shipbuilding History content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-04
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[6]Era inference built on: NavSource specifications (2 x GM 8-268A diesels, reduction gear, 2 shafts - diesel only, no steam plant); Shipbuilding History class page (wooden-hulled design); GAO HRD-80-2 (Navy asbestos-use era); DANFS spec block [other_primary]
- Locator
- NavSource specifications; Shipbuilding History class page; GAO product page HRD-80-2
- Finding type
- asbestos_application
- Finding
- A diesel-driven wooden-hulled minesweeper built 1942-43 sits inside the Navy's documented asbestos-use era; era-standard small-craft applications aboard a vessel of this type and period were diesel exhaust lagging, machinery-space gaskets, valve packing, and electrical insulation. As a diesel boat she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply - and her wooden hull implies a smaller installed-insulation footprint than a steel steam vessel of the period. Asbestos aboard this hull is a reasonable era-consistent inference, not a ship-proven fact.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1942-1963
- Population
- South Coast Co. construction trades (1942-43); crew (1943-55); yard/base trades at Pearl Harbor and Charleston overhauls; reserve-fleet and post-Navy conversion crews
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or litigation product-identification located for YMS-317/Grosbeak. Names era-standard applications, not confirmed installed materials. No quantity, no manufacturer attribution. Wooden-hull construction reduces but does not eliminate likely asbestos applications (exhaust lagging and gaskets remain).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-05
-
[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 (1942-43) and Navy service era (1943-55).
- 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-317-yms317-06
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[8]Batch-8945 search ledger (this record): DANFS transcription; NavSource; NARA Special List 44 p.118; Shipbuilding History class page + build table; uboat.net hull/class pages; GAO product page; NVR (blocked); NARA catalog (JS-rendered); CourtListener (4 base queries) [other_primary]
- Locator
- search_ledger rows sl-uss-yms-317-yms317-01 through -10
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation record naming YMS-317 / Grosbeak (AMS-14 / MSC(O)-14) was found in the public sources searched (see search_ledger). CourtListener base queries completed: '"YMS-317"' opinions and dockets both returned count 0 (authenticated API v4, 2026-10-04). The '"Grosbeak"' opinion and docket queries could not be run - five spaced attempts over ~40 minutes all paced out on the shared ~58/hr fleet limiter; logged as blocked (open gap), 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. Deck logs exist (SL-44) but are undigitized; builder yard records for South Coast Co. and any 1961 conversion/shipbreaking documentation are unfound leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-07
-
[9]Designation/status cross-check: NavSource designation timeline (decommissioned 2 Jan 1947; named AMS-14 18 Feb 1947; MSC(O)-14 7 Feb 1955) vs DANFS narrative (no 1947 decommissioning or 1955 reclassification mentioned) vs uboat.net (no 1947 decommissioning listed) [other_primary]
- Locator
- NavSource 11/19317.htm timeline; DANFS Grosbeak IV narrative; uboat.net ship/9737; koreanwar.org USS Grosbeak page (unverified crew note)
- Finding type
- historical_record
- Finding
- STATUS DISCREPANCY (not resolved, flagged): NavSource records a decommissioning on 2 January 1947 - six weeks before the 18 February 1947 naming/reclassification - while DANFS does not mention it and its narrative (Operation PORTEX 1950, Battle Efficiency 'E' awards 1950-1952, training-ship duty) implies continuous service. The likely reconciliation is a brief post-war inactivation followed by return to service (possibly 'in service' rather than 'in commission') for Mine Warfare School duty, but no primary record confirming the 1947-55 status was located; a crew-message note on koreanwar.org asserts 'ALTHOUGH IN COMMISSION' for 1951-53 (unverified secondary). Also flagged: DANFS prints 'Green Springs Cove' for the 16 November 1955 destination - the documented Atlantic Reserve Fleet berthing site is Green Cove Springs, FL (NavSource reads correctly).
- Verification
- partial
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1947-1955 (status window)
- Limitations
- Corrects/flags milestone-status and place-name inconsistencies, not a material claim. The 1947 decommissioning may be real (reserve inactivation) - NavSource is the only source carrying it and DANFS silence is not disproof. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-317-yms317-08