Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet di-packet.md (1 sources cited) [nhhc_danfs]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (identity). — real identity: NONE — never named; served as USS ATR-21. [M] HyperWar
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-atr-21-atr21-pkt-di-packet-md
-
[2]Bureau of Ships, Ships' Data, U.S. Naval Vessels, Vol. III (NAVSHIPS 250-012, 1945), 'Auxiliaries - Rescue Tugs (ATR)' design, machinery, and construction tables, pp. 414-421 (shipscribe.com scan) [other_primary]
- Locator
- SDB1945v3 pp. 414-415 (ATR class design/machinery tables), p. 416 (per-hull engine/boiler makers, ATR21 row), p. 417 (per-hull construction table, ATR21 row); List of Naval Vessels 'Rescue Tugs (ATR)' section
- Finding type
- vessel_history
- Finding
- BuShips 'Ships' Data, U.S. Naval Vessels, 1945' Vol. III (NAVSHIPS 250-012) official tables: per-hull construction row 'ATR21 - keel laid 20 Apr 43 - launched 28 Dec 43 - date of first commission 25 May 44'; per-hull machinery row: engine Fulton Iron Wks. vertical 3-expansion, boilers B. & W. 'D' type. ATR1-40 design rows: 165'5" overall, 155'0" waterline, 33'4" extreme beam, 12.2 kt trial speed, 1,312 t trial displacement (10 t/inch immersion), limiting displacement 1,315 t, limiting draft 15'10", accommodations 5 officers/47 enlisted, armament 1 x 3"/50 cal. D.P., largest boom capacity 4 t, one propeller, 1,600 shaft hp, 2 boilers at 260 psi saturated, no main reduction gears, 2 turbo-driven 60 kW 120 V DC ship's-service generators, fuel oil 1,620 bbls, and the explicit class note 'Wood hulls.' List of Naval Vessels section confirms 'ATR21-40' under Rescue Tugs (ATR).
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 1945 publication; records 1942-1945 data
- Population
- Wartime accommodations documented as 5 officers + 47 enlisted
- Limitations
- Official wartime BuShips publication naming this hull by designation - authoritative for construction milestones, machinery, and design characteristics. Its construction table groups ATR-21/22 under Jakobson Shipyard, Oyster Bay - a builder attribution contradicted by yard production lists and adopted as an official-table error (see correction row ev-uss-atr-21-atr21-07). Contains no asbestos or insulation-material statement; supports no asbestos claim.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-01
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[3]shipscribe.com ATR-1 class page (construction/disposition tables and ship notes, compiled from NVR/MC records) + shipbuildinghistory.com Camden and Jakobson yard production lists [other_primary]
- Locator
- shipscribe ATR01 class tables (construction row 21; disposition row 21; ship note 21) and class notes; shipbuildinghistory.com/shipyards/emergencysmall/camden.htm ATR-21 row; jakobson yard list (absence of ATR-21/22)
- Finding type
- vessel_history
- Finding
- Shipscribe ATR-1 class table and ship notes (compiled from Naval Vessel Register/Maritime Commission records): ATR-21 ordered 19 Jun 42 under the FY1942 program; builder Camden SB; keel 20 Apr 43, launch 28 Dec 43, commissioned 25 May 44; decommissioned 13 Jun 46; struck 15 Aug 46; disposed 4 Aug 47 (fate 'MC/D', Maritime Administration sale 4 Aug 47). Ship note: 'Sold (delivered) by MC to A. J. Anderson, New York. Merc. EL RIO JANO (Argentina).' Camden Shipbuilding yard production list independently carries 'ATR-21, US Navy, tug, 850 gt, delivered 25-May-44, to Argentina as El Rio Jano'; Jakobson Shipyard's own yard list contains ATR-15, -16, -66, -67 only - no ATR-21/22.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 1942-1947
- Limitations
- Secondary compilation of official register/MC records - milestone dates corroborated by BuShips SDB1945 (identical keel/launch/commission dates) and the Camden yard list's matching delivery date. Decommissioning (13 Jun 46) and stricken (15 Aug 46) dates rest on this compilation alone; NavSource lists both as unknown and no second official source was reached this session. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-02
-
[4]Dictionary of American Naval Fighting Ships, 'Pegasus' (AK-48) entry, Vol. 5 p.245 - text verified via hazegray public-domain DANFS mirror; canonical NHHC page returns 404 (link rot) [nhhc_danfs]
- Locator
- DANFS Pegasus (AK-48) entry, Caribbean operations paragraph; hazegray mirror ak48.txt
- Finding type
- vessel_history
- Finding
- DANFS (Dictionary of American Naval Fighting Ships, Vol. 5 p.245, 1970), USS Pegasus (AK-48) entry - verbatim: 'Yet another assignment sent her to the Canal Zone 17 August; thence, she sailed for Guantanamo 23 August. On the 25th her engine failed. She drifted for almost two days until taken in tow by rescue ocean tug ATR-21. Following temporary repairs in Cuba, she reached Norfolk Va., 17 September for a three-month overhaul.' This is the only DANFS-documented operational event naming ATR-21 and places her on Caribbean/Western Atlantic rescue-tug duty in August 1944.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 1944-08
- Population
- ATR-21 crew (~52); Pegasus crew rescued under tow
- Limitations
- DANFS is the authoritative Navy ship biography; text reached via mirror because the NHHC canonical page is dead (same link-rot pattern as batch-01). Establishes one documented towing operation (Pegasus, Aug 1944) - DANFS contains no asbestos, materials, or insulation statement for this hull, and no DANFS entry exists for ATR-21 itself.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-03
-
[5]Consolidated era inference - BuShips SDB1945 v3 machinery data (steam plant, 2 boilers) + era shipbuilding practice; era background: Corn & Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' Am. J. Ind. Med. 11(3):359-373 (1987) [other_primary]
- Locator
- SDB1945v3 ATR class machinery table + ATR21 per-hull row; AJIM article abstract
- Finding type
- asbestos_application
- Finding
- Era/design inference for a wooden-hulled steam rescue tug of 1943-44 construction: unlike diesel-electric contemporaries (ATA type), this class carried two B&W 'D'-type boilers and a vertical triple-expansion engine, so the boiler-lagging pathway applies - era-typical applications are boiler and steam-drum insulation, steam-line lagging, exhaust-uptake insulation, valve and flange gaskets, machinery packing, engine-room thermal/acoustic insulation, accommodation insulation, and brake linings on towing machinery and windlass. The wooden hull narrows structural insulation scope but does not eliminate machinery insulation. Peer-reviewed scholarship documents extensive asbestos use in WWII U.S. shipbuilding generally during this hull's construction era.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-26
- Study period
- 1943-1946 (U.S. service); inference drawn from 1943-44 construction era
- Population
- Construction trades (Camden, ME, 1943-44); crew of ~52
- Limitations
- Class/era inference only - no ship-level asbestos record located for this hull. The machinery table confirms the plant type (steam, 2 B&W boilers) but says nothing about insulation content. Establishes no quantities, no locations, no exposure for any individual.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-04
-
[6]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 to automated fetch, HTTP 403; content via product-page description)
- Finding type
- gov_survey
- Finding
- GAO documented the Navy's asbestos-protection program: standing policy (1975) removed asbestos insulation only when damaged or required for repairs, modified 1979 to selective replacement in high-maintenance areas - meaning original-era insulation typically remained in place for decades unless a yard period disturbed it.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-26
- Study period
- 1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation, not vessel-specific; the report postdates this hull's U.S. service (ended 1946, sold 1947) by three decades and covers active-fleet/shipyard policy - it bears on era context only, not on any documented condition aboard this ship.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-05
-
[7]CourtListener API v4 search index - '"ATR-21"' (o: 1, collision; r: 11 dockets, all collisions), 'ATR-21' unquoted (o: 466, top-20 all collisions), '"El Rio Jano"' (o: 0) [court_record]
- Locator
- search_ledger rows sl-uss-atr-21-atr21-09 through sl-uss-atr-21-atr21-11
- Finding type
- litigation_documented
- Finding
- CourtListener sweep (authenticated API v4, 2026-09-26): quoted opinion search '"ATR-21"' returned 1 result - 'In re Marriage of Ard and Ard-Phillips' (Tex. App.-Houston [14th Dist.] 2015), a divorce case in which 'ATR-21' appears as a record/exhibit locator - name collision, not the vessel. Unquoted opinion search 'ATR-21' returned 466 results - all tokenizer/name collisions on review of the top 20 (e.g., 'Araneta v. Atr-Kim Eng Financial Corporation'). Docket-type (RECAP) search '"ATR-21"' returned 11 dockets / 15 documents - all collisions (party name 'ATR-Kim Eng Financial Corporation', exhibit labels, form codes in firearms-inspection and MDL exhibits); none referenced the vessel. Opinion search '"El Rio Jano"' returned 0 results. No qualifying asbestos litigation, no other litigation, and no vessel-related hit located under any variant.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 2026-09-26
- Limitations
- Index-level absence, not a merits finding: every hit under every variant was a collision, and no docketed case naming this hull is reachable under its designations. A hull-number-only auxiliary sold to foreign merchant service in 1947 has minimal litigation surface; state-court filings, unscanned federal filings, and cases referencing only 'the tug' or a plaintiff's ship list remain outside index coverage. The '"El Rio Jano"' docket-type sweep was pacing-blocked at production (opinion-type returned 0 - see search_ledger sl-uss-atr-21-atr21-11).
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-06
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[8]BuShips SDB1945 v3 p.417 construction table vs. shipbuildinghistory.com Camden and Jakobson yard lists, shipscribe ATR-1 class table, NavSource ATR-21/-22 pages and photo caption [other_primary]
- Locator
- SDB1945v3 p.417 ditto block; Camden yard list ATR-21/-22 rows; Jakobson yard list (absence); NavSource 40021/40022 pages; NavSource photo caption 'underway off Rockland, ME. circa 30 May 1944'
- Finding type
- historical_record
- Finding
- Builder-attribution correction: the official BuShips Ships' Data 1945 Vol. III construction table (p. 417) ditto-groups ATR-21 and ATR-22 under 'Jakobson Shipyard Inc., Oyster Bay, Long Island, N.Y.', and NavSource repeats 'Jakobson Shipyard' for both hulls - but NavSource's ATR-21 milestone dates (laid 3 Mar 43, launched 26 Jan 44, commissioned 11 Apr 44) are verbatim ATR-25's dates (Fulton Shipyard, Antioch), showing its ATR-21 line is corrupted. Against the SDB grouping: (a) the Camden Shipbuilding & Marine Railway yard production list carries 'ATR-21 ... delivered 25-May-44 ... to Argentina as El Rio Jano' and 'ATR-22 ... 10-Jul-44' - delivery dates identical to the official commission dates; (b) Jakobson's own yard list contains ATR-15, -16, -66, -67 only - no ATR-21/22; (c) Camden demonstrably built the immediately preceding block ATR-17/18/19/20 (HMRT Director/Emulous/Freedom/Justice, lend-lease); (d) ATR-21 was photographed underway off Rockland, Maine - adjacent to Camden - circa 30 May 1944, five days after commissioning. Camden Shipbuilding & Marine Railway Co., Camden, Maine is adopted as builder; the SDB1945 ditto-grouping is treated as a wartime official-table error (or a contract-holder vs. build-site distinction). Also corrected: NavSource's 'Foster Wheeler D-type boilers, 200 psi' for ATR-21 is set aside in favor of SDB's per-hull row (Babcock & Wilcox 'D', 260 psi saturated) - NavSource's own ATR-22 page agrees with SDB (B&W).
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 1943-1947
- Limitations
- Resolves a genuine primary-vs-secondary conflict in favor of the weight of evidence: the Camden attribution is supported by the builder's own production list (with matching delivery dates), sister-block construction (ATR-17-20), the absence of ATR-21/22 from Jakobson's list, and photographic geography. The official SDB1945 table formally disagrees; residual uncertainty is carried in gaps. No asbestos content in any of these sources.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-07
-
[9]NARA Special List #44 (by ship number), ATR-21 row; DPLA contract-plan item 'U.S. Rescue Tugs - ATR 1 thru 40 Inc.' [other_primary]
- Locator
- SL-44 ship-number list, 'ATR-21 5/25/1944 6/30/1945'; DPLA item 6aff1abc1dbc778c05225c1089d63cd4; NavSource 40021 photo captions
- Finding type
- historical_record
- Finding
- Archival leads (cataloged, not retrieved): NARA Special List #44 (Logbooks of U.S. Navy Ships and Stations) indexes deck logs for ATR-21 covering 25 May 1944 - 30 Jun 1945 (RG 24); log coverage from Jul 1945 through decommissioning (Jun 1946) is not indexed there. A DPLA-listed contract plan, 'Outboard Profile & Deck Plan, U.S. Rescue Tugs ATR 1 thru 40,' covers the class design. NavSource's photo archive holds two ATR-21 images (underway off Rockland ME circa 30 May 1944 via National Association of Fleet Tug Sailors; one 'US Navy photo from DANFS'), implying NHHC/BuShips imagery exists, though no NHHC photo-catalog entry was reached this session.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-26
- Study period
- 1943-1947 records
- Limitations
- Catalog-level identification only - logs and plans not examined and no box-level retrieval performed. Whether the deck logs, builder's trials records, or MC disposal file for this hull contain machinery-insulation or repair detail is unknown until surveyed. Nothing in this row is an asbestos finding.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-08
-
[10]Batch-2954 search ledger (this record): BuShips SDB1945 v3, shipscribe ATR-1 class compilation, Camden and Jakobson yard lists, DANFS (Pegasus) via hazegray, NavSource archive page, NARA Special List #44, CourtListener name/hull sweeps, GAO product page, NHHC site search [other_primary]
- Locator
- search_ledger rows sl-uss-atr-21-atr21-01 through sl-uss-atr-21-atr21-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming this hull (ATR-21 / El Rio Jano) was found in the public sources searched (see search_ledger).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-26
- Study period
- 2026-09-26
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1943-44 steam auxiliary is era-consistent with asbestos in boiler insulation, steam-line lagging, gaskets, and brake linings. Does not establish presence or absence; does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-atr-21-atr21-09