Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 375-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ix-526-ix526-pkt-375-packet-md
-
[2]Naval Vessel Register (NAVSEA), SHIPSDETAIL page for YR 94 (page data last updated 2012-02-16; retrieved via Internet Archive Wayback Machine capture 2017-01-07 - the live NVR detail page serves only the navigation shell to automated fetches) [other_primary]
- Locator
- NVR SHIPSDETAIL_YR_94.HTML, Wayback capture 2017-01-07; milestone dates, physical characteristics, custodian blocks
- Finding type
- vessel_history
- Finding
- Naval Vessel Register entry for 'NO NAME (YR 94)' (ex-YFN 723, YFNB 12, YDT 11, YRST 1, IX 526), Floating Workshop (N-S-P): UIC 17656; status 'Active, in service' with date status changed 10/01/1975; award 11/30/1943; keel 10/02/1944; launch 01/17/1945; delivery 02/13/1945; 261 ft overall x 48 ft beam, draft limit 13 ft; 700 tons light / 2,700 tons full load / 2,000 tons deadweight; steel hull, steel superstructure; no propulsion; accommodations 15 officers + 71 enlisted; custodian COMPACFLT Berthing & Messing Program, Pearl Harbor; planning yard Puget Sound NSY, Bremerton. NVR builder field reads 'Everett Marine Ways Inc.' - conflicts with NavSource/shipbuildinghistory 'Everett-Pacific Shipbuilding & Dry Dock Co.'; see gaps.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-2017 (record window)
- Limitations
- Official register establishes identity, milestones, dimensions, custodianship, and active status as of the record's 2012 update (corroborated by a March 2022 photograph at Pearl Harbor). Contains no asbestos, materials, or environmental fields - supports no asbestos claim. The NVR builder attribution ('Everett Marine Ways Inc.') conflicts with secondary compilations; the NVR page gives no strike/disposal date because the craft remains in service.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-01
-
[3]NavSource Naval History, Service Ship Photo Archive 14/3394 (YR-94/IX-526/YRST-1/YDT-11/YFNB-12/YFN-723); corroborated by shipbuildinghistory.com Everett-Pacific yard table (builder's hull 47) and navysite.de YR-94 page [other_primary]
- Locator
- NavSource 14/3394 history block and photo captions (SERVPAC letter image of 1966-05-26, Alpha Docks photos 1975/1978, Sierra Piers photo 2006-09-20, Pearl Harbor photo 2011-08-24); shipbuildinghistory.com/shipyards/emergencysmall/everettpac.htm row 47; navysite.de/yr/yr94.htm
- Finding type
- vessel_history
- Finding
- Designation and service chain (NavSource compilation of official records): laid down 1944-10-02 at Everett-Pacific Shipbuilding & Drydocking Co., Everett WA, as covered lighter YFN-723 (non-self-propelled); launched 1945-01-17; delivered and placed in service 1945-02-13; reclassified large covered lighter YFNB-12 (date unknown); converted to diving tender YDT-11 in 1966 (NavSource's narrative dates the refit to Subic Bay, while an imaged Service Force Pacific letter of 1966-05-26 commends the 12th Naval District industrial manager 'for the successful design and conversion of YFNB-12 to YDT-11' - the two accounts differ on where the work was performed); reclassified salvage craft tender YRST-1 circa 1966-67; served in Vietnamese waters (awards: Vietnam Service Medal with one star, Republic of Vietnam Campaign Medal, National Defense Service Medal); towed by USS Chowanoc (ATF-100) from Subic Bay 1971-07-07 to Pearl Harbor (arrived Alpha Docks 1971-07-30); entered Pearl Harbor Naval Shipyard 1971-10-06 for modification including installation of a Taylor Diving System to support the Navy/Makai Range CY-71 saturation-dive project; thereafter berthed with Service Squadron Five at Alpha Docks as Harbor Clearance Unit One headquarters and berthing barge; reclassified Miscellaneous Unclassified IX-526 (date unknown); reclassified floating workshop YR-94 circa 1979; in service at Pearl Harbor under COMPACFLT (photos 2006, 2011; navysite.de photo 2022-03-18).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1945-2022
- Population
- Crews and embarked HCU-1 staff/divers (~34-man detachment when configured as salvage tender HQ); accommodated personnel in the 15-officer/71-enlisted berthing fit-out across the YDT/YRST/YR configurations
- Limitations
- Secondary compilation of official records - the reclassification dates for YFNB-12, YRST-1 (circa 1966-67), and IX-526 are approximate or unpublished in the source itself. Establishes service history and the documented Pearl Harbor Naval Shipyard modification event; contains no asbestos or materials information and supports no asbestos claim.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-02
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[4]Operation WIGWAM, Scientific Director's Summary Report (Joint Task Force Seven, 1955), DTIC ADA995030; companion operation report DTIC ADA995001 [other_primary]
- Locator
- ADA995030 summary findings (YFNB-12 range and wave-height figures); ADA995001 array narrative (12 Jan 1955 towing trial; 13-14 May assembly and tow-wire references to YFNB-12)
- Finding type
- historical_record
- Finding
- As YFNB-12 the hull was an instrument barge in the Operation WIGWAM deep underwater nuclear test array. The Scientific Director's Summary Report records that on 14 May 1955 a ~30-kt Mark 90 'Betty' device detonated at 2,000 ft depth in 16,000 ft of water at 28-44 N / 126-16 W, about 500 mi southwest of San Diego; YFNB-12, at 5,500 ft from the detonation, 'rose and fell a distance of 37 ft' in surface waves larger than predicted and sustained only 'very minor damage,' consistent with Naval Electronics Laboratory predictions that serious YFNB hull damage should not occur beyond 4,000 ft. The companion operations report describes the array buildout and instrument fit-out involving the YFNBs in January and May 1955 exercises off San Diego.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1955-01 to 1955-05
- Population
- Task force personnel handling the instrument array before/after the shot (hull unmanned at detonation)
- Limitations
- Primary government test report establishes this hull's participation as an unmanned instrument barge at 5,500 ft from an underwater nuclear detonation - a radiological-context event, not an asbestos finding. The report does not document contamination of, remediation of, or crew presence aboard YFNB-12; whether the barge carried radiological residue afterward is not addressed in the public sections reviewed. DTIC blocked automated retrieval of the PDFs (HTTP 403); content verified via indexed full-text snippets.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-03
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[5]EPA/MARAD, National Guidance: BMPs for Preparing Vessels Intended to Create Artificial Reefs, EPA 842-B-06-002 - 'Where is asbestos found on a ship?' inventory and pre/post-1980 presumption note [other_primary]
- Locator
- Guidance pp. 30-32 (asbestos section: definition, shipboard locations inventory, preparation BMPs)
- Finding type
- asbestos_application
- Finding
- Era/design inference for this 1945-built hull: the EPA/MARAD reefing guidance states that thermal system insulation and surfacing material in vessels constructed after 1980 'may be presumed to be free of asbestos-containing material' - the converse presumption applies to a WWII-era hull. The guidance's shipboard asbestos inventory covers bulkhead and pipe thermal insulation, bulkhead fire shields, uptake and exhaust-duct insulation, electrical cable materials, brake linings, floor tiles and deck underlay, steam/water/vent flange gaskets, adhesives and mastics, sound damping, molded plastic products, packing in shafts and valves, arc chutes in circuit breakers, pipe hanger inserts, and weld-shop protectors. For a non-self-propelled covered lighter with no boilers, engine room, or steam plant, the plausible subset concentrates in the accommodation/workshop fit-out added in the 1966 conversion and later berthing configuration: compartment insulation, fire shields, deck coverings, joiner materials, gaskets and packing in plumbing and compressed-air systems, electrical materials, and brake linings on deck handling gear.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1945-present
- Population
- Everett-Pacific construction trades (1944-45); 12th Naval District/Subic Bay conversion workers (1966); PHNSY modification workers (1971); embarked crews and berthing occupants (1945-present)
- Limitations
- Regulatory-era inventory of where asbestos is found on ships generally - not a hull record; the document does not name this craft. The accommodation-fit-out narrowing is analytic inference from the no-propulsion hull form, not a survey. Does not establish presence, quantity, individual exposure, or present-day condition aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-04
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[6]Corn, Jacqueline Karnell, and Jennifer Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' American Journal of Industrial Medicine 11(3):359-373 (1987) [other_primary]
- Locator
- AJIM 11(3):359-373; Everett-Pacific Navy-contract context via HyperWar U.S. Naval Activities WWII - Washington state listing (contract NOy-5326)
- Finding type
- asbestos_application
- Finding
- Peer-reviewed historical study documents that asbestos was used extensively as a fireproofing and insulating material in U.S. shipbuilding during WWII, the program era under which this hull was built at Everett-Pacific (a Navy-funded Emergency Shipbuilding Program yard on contract NOy-5326).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1940s era documented; article 1987
- Population
- WWII shipyard workers and Navy crews (class context)
- Limitations
- Program/era-level scholarship on WWII shipbuilding asbestos generally; does not name this craft, does not establish that asbestos was installed in this bare-bones covered-lighter build or any later conversion, and establishes nothing about quantity, location, condition, exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-05
-
[7]Kolonel LN, Yoshizawa CN, Hirohata T, Myers BC, 'Cancer occurrence in shipyard workers exposed to asbestos in Hawaii,' Cancer Research 45(8) (Aug 1985), PMID 4016758; Kolonel LN et al., 'Cancer mortality in a cohort of naval shipyard workers in Hawaii: early findings,' J Natl Cancer Inst (Apr 1980), PMID 6928986; DTIC, 'Navy Environment: Health Effects of Asbestos Exposure Among Pearl Harbor Naval Shipyard Workers' (1979) [other_primary]
- Locator
- PubMed records 4016758 / 6928986; DTIC PHNSY report (1979-10-31, abstract-level); yard availability date from NavSource (ev-uss-ix-526-02)
- Finding type
- historical_record
- Finding
- The hull's documented Pearl Harbor Naval Shipyard availability (entered 1971-10-06 for Taylor Diving System modification) occurred at a yard whose asbestos exposure history is documented in peer-reviewed occupational-health literature: a retrospective cohort of 7,971 male PHNSY workers showed elevated lung-cancer risk with >=15 years exposure and seven mesotheliomas in the 1977-1982 follow-up subset (67.3 per million vs 5.8 statewide); the companion DTIC report documents the program's asbestos-exposure investigation of PHNSY workers. The craft has remained based at Pearl Harbor since 1971.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1971 availability; studies cover WWII-1980s workforce
- Population
- PHNSY workers performing the 1971 modification (yard-level exposure cohort)
- Limitations
- Yard-level occupational documentation: establishes that asbestos exposure was present and studied among PHNSY workers in the period when this hull underwent shipyard modification, NOT that this hull contained asbestos or that any person aboard it was exposed. The studies concern shipyard trades, not barge occupants. No work package or materials record for the 1971 availability on this hull was located.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-06
-
[8]CourtListener API v4 opinion searches, exact-phrase "IX-526" and "YRST-1" (authenticated) [court_record]
- Locator
- search_ledger rows sl-uss-ix-526-07 through sl-uss-ix-526-09
- Finding type
- litigation_documented
- Finding
- CourtListener v4 opinion searches (authenticated, 2026-09-29): '"IX-526"' returned 3 results, all name collisions - M.K. v. Pearl River County School District (5th Cir. 2025, civil rights), Miotto v. Yonkers Public Schools (S.D.N.Y. 2008, employment), and Albanese v. McGinnis (N.D. Ill. 1993, habeas) - none reference the vessel or asbestos; '"YRST-1"' returned zero results. Complementary queries ('YDT-11', 'YFN-723', 'YFNB-12', 'YR-94', docket-type searches, and 'Everett Pacific' builder-litigation queries) were attempted but fleet pacing budget was intermittently exhausted during the session - see search_ledger for per-query status.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2026-09-29
- Limitations
- Clean negatives at the opinion layer for the two unique designations queried - the three IX-526 returns are collisions on reporter/docket text, not vessel references. Absence of a located opinion does not prove no claim was ever filed: pleading-stage filings and settled/administrative claims do not reach the opinion layer, and asbestos litigation touching service craft typically runs under shipyard or owner names (e.g., Everett-Pacific/Paccar successor exposure at the builder yard) rather than hull numbers. Remaining designation and docket-type queries were pacing-blocked; recheck if litigation coverage is revisited.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-07
-
[9]Batch-4832 search ledger (this record): NavSource; NVR via Wayback; shipbuildinghistory; navysite.de; DTIC/OSTI Wigwam reports; NHHC/DANFS; hazegray DANFS IX index; HyperWar USN index; PubMed/NCBI; EPA/MARAD guidance; CourtListener [other_primary]
- Locator
- search_ledger rows sl-uss-ix-526-01 through sl-uss-ix-526-11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, environmental certification document, or docketed case naming YFN-723, YFNB-12, YDT-11, YRST-1, IX-526, or YR-94 was found in the public sources searched (see search_ledger). DANFS contains no entry for the craft (NavSource explicitly notes none exists); the NVR record carries no materials/hazmat fields; the craft remains in Navy service, so no disposal-cycle environmental documentation exists.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2026-09-29
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1945 hull with accommodation/workshop conversions at asbestos-era yards (1966 Subic Bay refit, 1971 PHNSY availability) is consistent with retained era materials, and the craft's still-active status means no end-of-life survey was ever triggered. Does not establish presence or absence; does not establish or defeat any exposure claim or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-08
-
[10]NARA Guide to Federal Records RG 19; NARA deck-log guidance (archives.gov, series NAID 594258); NavSource-imaged SERVPAC letter of 1966-05-26; PHNSY availability documented at ev-uss-ix-526-02 [other_primary]
- Locator
- RG 19 record-group guide; NARA digitized deck-log list (no listing for this craft's designations located); SERVPAC letter imaged at navsource.net/archives/14/14339401.jpg
- Finding type
- historical_record
- Finding
- Archival leads (not retrieved - no reproduction orders authorized): (a) NARA RG 19 (Bureau of Ships) - YFN-class standard plans and the Everett-Pacific contract file (NOy-5326) could document as-built materials; (b) the 1966-05-26 Service Force Pacific letter commending the 12th Naval District for the YFNB-12-to-YDT-11 conversion design (imaged on NavSource via the Darryl Baker collection) implies a conversion design package whose specifications would identify installed materials; (c) PHNSY planning/production records for the October 1971 availability (Taylor Diving System installation) - the likeliest repository of a hull-specific work-and-materials record; (d) NARA deck-log series NAID 594258 (Logbooks of U.S. Navy Ships and Stations, 1941-1978) - applicability uncertain since non-commissioned service craft may not have kept deck logs; (e) COMPACFLT Berthing & Messing Program records for the current floating-workshop configuration.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- 1945-present records
- Limitations
- Record-location mapping only - no box-level retrieval performed; existence of asbestos-specific documents for this hull is unknown until surveyed. Service craft of this type frequently lack deck logs entirely. Nothing in this row is an asbestos finding.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-526-09