USS Daring (AM-87)

Evidence

11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).

1. [1]DANFS, 'Daring' (AM-87) / PC-1591 - verbatim transcription reproduced on the NavSource per-hull page under the 'Dictionary of American Naval Fighting Ships History' header (live history.navy.mil DANFS URL patterns daring.html / daring-i.html / pc-1591.html / daring-am-87.html all return 404 - standing link rot, same as BATCH-01/1290/1298/1399/1433) [nhhc_danfs]

   Locator

   navsource.net/archives/11/02087.htm - 'Dictionary of American Naval Fighting Ships History' section, full Daring/PC-1591 narrative

   Finding type

   vessel_history

   Finding

   Official DANFS record for this hull: 'Daring (AM-87) was launched 23 May 1942 by Commercial Iron Works, Portland, Oreg.; and commissioned 10 October 1942, Lieutenant A. E. Stiff, USNR, in command.' Service per DANFS: sailed from San Francisco 2 February 1943, arrived Pearl Harbor 12 February 'for service as local escort and school ship, and sweeping mines' until 5 March when underway for Noumea; 'From 24 March 1943 until 25 November 1944 Daring remained in the southwest Pacific on inter-island escort duty and antisubmarine patrol, taking part in the invasion of the Treasury Islands on 6 November 1943. She was reclassified PC-1591 and her name cancelled 1 June 1944.' As PC-1591: 'Arriving at Ulithi 9 December 1944, PC-1591 escorted convoys to Guam, Saipan, Leyte, and the Palaus until 7 March 1945. She screened Pathfinder (AGS-1) on a survey of Casiguran Bay, Luzon between 10 March and 5 April, then put in to Saipan 14 April. From 13 May to 24 August she escorted convoys between Saipan and Iwo Jima, and on 13 October cleared Saipan for the west coast, arriving at San Francisco 13 November. She was decommissioned at Mare Island 22 January 1946 and transferred to the Maritime Commission for disposal 18 March 1948. PC-1591 received one battle star for World War II service.'

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-22

   Study period

   1942-1948

   Population

   Commercial Iron Works construction trades (Portland, 1942); wartime crew (design complement 65)

   Limitations

   DANFS documents identity, builder, launch/commission dates, service narrative, reclassification, disposal, and battle-star credit - not materials or asbestos content. The transcription is cited via the NavSource mirror because the live NHHC page returns 404 on every URL pattern tried; the mirror does not reproduce a DANFS spec block for this entry, so specification figures come from NavSource's own spec block (ev-02), not from DANFS.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-01

2. [2]NavSource Online: Mine Warfare Vessel Photo Archive - PC-1591 ex-Daring (AM 87), file 11/02087 (navsource.org mirror navsource.net fetched live) [other_primary]

   Locator

   NavSource 11/02087 - chronology block, specifications block, propulsion line, call sign, CO roster (6 COs)

   Finding type

   vessel_history

   Finding

   NavSource per-hull record: 'Laid down 12 March 1942 by the Commercial Iron Works, Portland, OR; Launched 23 May 1942; Commissioned USS Daring (AM 87), 10 October 1942; Reclassified as a Submarine Chaser, PC-1591, 1 June 1944; Decommissioned 22 January 1946 at Mare Island, CA; Struck from the Naval Register 25 February 1946; Transferred to the Maritime Commission for disposal 18 March 1948. Fate unknown.' Call sign Nan-Baker-William-King. Spec block: 295 t; 173'8"; 23' beam; 6'6" draft; 16 kts; complement 65; one 3"/50 dual-purpose gun mount, one 40mm mount, five 20mm mounts, two depth-charge tracks and two depth-charge projectors; propulsion 'Two 900hp Cooper Bessemer GNB8 diesel engines, Farrel-Birmingham single reduction gear, two shafts.' Commanding-officer roster of six: LT Allen Edward Stiff, USNR (10 Oct 1942); LT John Otis Phillips, Jr., USN (14 May 1943); LT William Thomas Hunt, USN (25 Aug 1943); LT Hal T. Benham, Jr., USNR (23 Apr 1944 - 11 May 1945); LT Sydney B. Wertheimer, USNR (11 May 1945 - October 1945); LT Grant Curry, Jr., USNR (October 1945 - 22 January 1946).

   Verification

   partial

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-22

   Study period

   1942-1948

   Population

   Commercial Iron Works trades (1942); commissioned crew (65); Mare Island inactivation workers (Jan 1946)

   Limitations

   Specialist secondary compilation - detailed but non-official; consistent with DANFS on all construction, reclassification, and disposal dates and adds the struck date (25 Feb 1946). Its propulsion line ('Two 900hp Cooper Bessemer GNB8') conflicts with NavSource's own class-index text ('two 1,770 brake horsepower Cooper-Bessemer GNB-8 diesels' for all but AM-96-99) - flagged in ev-08. Its CO roster conflicts with uboat.net's on branch (USN vs USNR) and end dates (Benham, Wertheimer) and on whether a sixth CO (Curry) served - flagged in ev-08. 'Fate unknown' extends no further than the 1948 transfer. Contains no asbestos information; supports no asbestos claim.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-02

3. [3]Shipbuilding History (Tim Colton compilation), 'Commercial Iron Works, Portland OR' yard table - Daring (AM 87) row + yard history header [other_primary]

   Locator

   shipbuildinghistory.com/shipyards/small/commercial.htm - 'COMMERCIAL IRON WORKS, Portland OR' table, row 39 (AM 87) + yard-history header

   Finding type

   vessel_history

   Finding

   Yard-table row for this hull: '39 | AM 87 | Daring | US Navy | Minesweeper | 1,250 | 174 | 10-Oct-42 | Later PC 1591, struck 1946' - the delivery date matching the 10 October 1942 commissioning exactly. Sisters in sequence: AM 82 Adroit (28-Jul-42), AM 83 Advent (19-Aug-42), AM 84 Annoy (2-Sep-42), AM 85 Conflict (7-Sep-42), AM 86 Constant (21-Sep-42), AM 87 Daring (10-Oct-42), AM 88 Dash (27-Oct-42) - the Portland-built block of the class per the NavSource class index ('AM 82 through 88, built at Portland, Oregon'). Yard history header: 'Commercial Iron Works was started in November 1916, by William T. Casey, Otto J. Hoak and Robert Boogs, on a 30-acre site just south of the Ross Island Bridge. It closed in 1946, after building an astonishing 188 boats during the course of WWII. The site was sold to Zidell Marine as a ship dismantling facility.'

   Verification

   verified

   Role

   supporting

   Documentation level

   ship_specific

   Accessed

   2026-09-22

   Study period

   1916-1946 (yard history); 1942-1948 (this hull's row)

   Population

   Commercial Iron Works workforce (Portland, OR, 1942; yard closed 1946)

   Limitations

   Compiler's yard table, secondary - corroborates builder, type, delivery (10-Oct-42 = commissioning), and disposal milestone ('struck 1946'; NavSource gives 25 February 1946). The '1,250' figure in the tonnage column conflicts with every documented displacement for this hull (295 standard / 450 full load / 275 long tons per the Wikipedia infobox) and reads as a different metric (possibly contract price) - flagged in ev-08. A yard table does not carry keel/launch dates. Contains no asbestos information; supports no asbestos claim.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-03

4. [4]NavSource Online: Submarine Chaser (SC/PC) photo index - 'Submarine Chaser 173-foot Steel Hull' class narrative covering the PC-461 type and the Adroit-class minecraft variant [other_primary]

   Locator

   navsource.net/archives/12/01idx.htm - 'Submarine Chaser 173' Steel Hull' header narrative + Adroit-class paragraph

   Finding type

   vessel_history

   Finding

   Class-level construction narrative: the WWII 173-foot patrol craft was 'steel hulled, twin diesel propelled'; 'in addition to 403 173-foot PC-class patrol craft ordered for the U.S. Navy in 1941, eighteen 173-foot hulls were ordered for use as minesweepers, as the Adroit class' - given names AM-82 through AM-99 (Adroit, Advent, Annoy, Conflict, Constant, Daring, Dash, Despite, Direct, Dynamic, Effective, Engage, Excel, Exploit, Fidelity, Fierce, Firm, Force). 'AM 82 through 88, built at Portland, Oregon' (Commercial Iron Works per the hull record and the Colton yard table); the other eleven at other yards. As completed they differed from the PCs in the sweep-cable reel at the stem, a longer superstructure with a squat dummy funnel, a kingpost and boom, and two stem davits. 'Only the Annoy (AM-84) is recorded as having been used to sweep for mines ... the others principally were employed as convoy escorts.' Atlantic units cycled through Norfolk Navy Yard May-June 1944 for removal of MCM gear and added ASW/AA ordnance; 'the Pacific units were modified at Pearl Harbor' - the class-documented conversion yard, though whether this hull returned to Pearl Harbor during the window is undocumented (she was continuously in the southwest Pacific 24 March 1943 - 25 November 1944 per DANFS). 'On 1 June 1944, all 18 lost their names and were reclassified PC-1586 through 1603.' 'At 450 tons full load, the Adroit class displaced 18 tons more than did the PCs. All but the last four built were propelled by two 1,770 brake horsepower Cooper-Bessemer GNB-8 diesels; AM-96-99 were given 1,440 brake horsepower Busch-Sulzer BS 539 diesels ... able to achieve 16.8 knots at 330 tons displacement ... about 4,000 nautical miles at 12 knots, and the normal crew comprised four officers and 61 enlisted personnel.'

   Verification

   verified

   Role

   supporting

   Documentation level

   class_or_era

   Accessed

   2026-09-22

   Study period

   1941-1945

   Population

   Construction trades at the five class yards (1941-43); Norfolk Navy Yard and Pearl Harbor modification workers (May-June 1944)

   Limitations

   Class-level description that names this hull's design family, builder block (Portland = AM-82-88), and conversion yard (Pearl Harbor for Pacific units) but carries no hull-specific materials information and does not show this hull's individual modification site - applying the Pearl Harbor conversion attribution to AM-87 specifically is inference, since DANFS places her continuously in the southwest Pacific through 25 November 1944. Its 'two 1,770 bhp Cooper-Bessemer GNB-8 diesels' conflicts with the per-hull NavSource spec block's 'Two 900hp' - flagged in ev-08; carried unreconciled. Its 450-ton full-load figure explains HyperWar's 450 t vs NavSource's 295 (full-load vs standard conventions). Contains no asbestos information; supports no asbestos claim.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-04

5. [5]HyperWar 'Ships of the U.S. Navy, 1940-1945' - PC-1591 (USS Daring) specification page (Patrick Clancey compilation, sourced from official-type references per its methodology note) [other_primary]

   Locator

   ibiblio.org/hyperwar/USN/ships/PC/PC-1591.html - specification block (compiled 1997)

   Finding type

   historical_record

   Finding

   PC-configuration spec block for this hull: 'PC-1591 (USS Daring): PC-1568 class Submarine Chaser (ex Adroit class Minesweeper): Displacement: 450 tons; Length: 173'8"; Beam: 23'; Draft: 11'7"; Speed: 17 knots; Armament: 1 3"/50, 1 40mm; Complement: 105; Cooper Bessemer diesel engine, twin screws, 1,770 shaft hp. Built at Commercial Iron Works and commissioned as AM-87 1942; Converted to Sub Chaser (PC-1591) 1944.' The 450-ton figure matches the NavSource class index's full-load displacement ('At 450 tons full load, the Adroit class displaced 18 tons more than did the PCs'); NavSource's 295 is the standard/design displacement.

   Verification

   partial

   Role

   context

   Documentation level

   ship_specific

   Accessed

   2026-09-22

   Study period

   1944-1945 (PC configuration)

   Population

   n/a (specification record)

   Limitations

   Secondary compilation. Its complement (105) and draft (11'7") conflict with NavSource/DANFS-convention figures (65; 6'6") - likely PC-fit vs AM-fit figures, unresolved. Its '1,770 shaft hp' is a total-plant reading between NavSource's 900-hp-per-engine (1,800) and the class index's 1,770-bhp-per-engine (3,540) - flagged in ev-08. Its 'PC-1568 class' label conflicts with Wikipedia's 'PC-461-class submarine chaser' naming - a class-naming convention dispute flagged in ev-08. Contains no asbestos information.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-05

6. [6]Consolidated era/design inference - documented construction and machinery (NavSource class index: steel-hulled, twin-diesel PC-461-type hull; 'two 1,770 bhp Cooper-Bessemer GNB-8 diesels'; NavSource per-hull spec block: 'Two 900hp Cooper Bessemer GNB8 ... two shafts') + documented builder and construction era (DANFS; Colton Commercial Iron Works table, 1942) [other_primary]

   Locator

   NavSource 12/01idx class narrative (steel hull, machinery, class conversion) + 11/02087 propulsion line; DANFS AM-87 entry; Colton commercial.htm yard row

   Finding type

   asbestos_application

   Finding

   Era/design inference: this hull is a 1942-built, steel-hulled, twin-diesel vessel - a PC-461-type hull completed as a minesweeper - with no boilers and no steam distribution, so its insulation load was materially lighter than a steam combatant's but not negligible: a steel hull still carried accommodation joiner work, electrical systems, and machinery requiring lagging and gasketing, and construction fell squarely inside the Navy's asbestos-use era (substitution did not begin until the early 1970s). Era-typical asbestos applications for a vessel of this type and period: engine and exhaust-system lagging on the two diesels and generator sets; machinery gaskets and packing; electrical-cable insulation; joiner/accommodation insulation; deck coverings/floor tile of the period; winch and windlass brake linings. Exposure-relevant populations if any such material was present: Commercial Iron Works construction trades (Portland, 1942 - the yard closed 1946); the commissioned crew (~65) across the 1943-45 Pearl Harbor/Noumea/southwest-Pacific and Ulithi/Guam-Saipan-Leyte-Palaus/Saipan-Iwo Jima service; Mare Island inactivation workers (January 1946); and the Maritime Commission disposal workforce (1948, fate of the hull undocumented).

   Verification

   inferred

   Role

   supporting

   Documentation level

   class_or_era

   Accessed

   2026-09-22

   Study period

   1942-1948

   Population

   CIW trades 1942; crew 1942-45; Mare Island inactivation workers 1946; MC disposal workforce 1948

   Limitations

   Inference from documented design, machinery type, and construction era - NOT a hull materials record. No survey, specification, or material schedule naming AM-87/PC-1591 was located; establishes no asbestos content, quantity, location, condition, individual exposure, or causation. The diesel (non-steam) plant weakens the inference relative to steam vessels of the same era, though the steel hull and 1942 construction keep it within the asbestos-era window. The Pearl Harbor conversion modification is a class-level attribution - it is not carried as a ship-specific exposure event because whether this hull transited to Pearl Harbor for it is undocumented.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-06

7. [7]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) - product-page description (gao.gov returns HTTP 403 to automated fetch - standing condition since BATCH-01); and T.J. Bigley (Navy) letter to GAO, 5 Jan 1979, as quoted in 'The Asbestos Health Hazards Compensation Act,' Journal of Legislation (Notre Dame) 10(1) [gao]

   Locator

   gao.gov/products/hrd-80-2 product page; Notre Dame J. Legislation 10(1), 'The Asbestos Health Hazards Compensation Act' (scholarship.law.nd.edu/jleg/vol10/iss1/3) quoting Bigley letter of 5 Jan 1979

   Finding type

   gov_survey

   Finding

   Program-level documentation of the asbestos window containing this hull's entire construction and commission: GAO HRD-80-2 records that the Navy's product specifications for thermal insulation were changed in 1973 to specify asbestos-free materials, but asbestos materials already purchased were still installed - 'some ships were delivered with asbestos insulation as late as May 1978'; the Navy's elimination policy issued October 1975. A Navy letter to GAO dated 5 January 1979 (T.J. Bigley to Robert F. Hughes, quoted in the Notre Dame Journal of Legislation) states: 'all ships presently in service contain some quantity of asbestos.' AM-87/PC-1591 was built 1942 and in commission 1942-46 - entirely inside the pre-1973 as-built asbestos era.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-09-22

   Study period

   1973-1979 policy window documented; hull era 1942-1948

   Population

   Navy personnel and shipyard workers, service-wide (era context)

   Limitations

   Program/era-level documentation; neither source names this vessel, class, or builder. GAO's fieldwork concerned shipyard workers (Long Beach, Norfolk). The 'all ships' statement is quoted from a primary letter via a law-review source - the letter itself was not retrieved. gao.gov returned HTTP 403 to automated fetch (standing since Batch 01); the product-page description was relied on. Establishes nothing about this hull's materials, condition, or any individual exposure - and for a diesel-plant vessel the proposition applies with materially reduced scope.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-07

8. [8]Source-discrepancy resolution - DANFS (NavSource mirror) vs NavSource 11/02087 + 12/01idx class index vs HyperWar PC-1591 spec block vs Colton yard table vs uboat.net vs Wikipedia infobox [other_primary]

   Locator

   navsource.net/archives/11/02087.htm + 12/01idx.htm; ibiblio.org/hyperwar/USN/ships/PC/PC-1591.html; shipbuildinghistory.com/shipyards/small/commercial.htm; uboat.net/allies/warships/9250.html; en.wikipedia.org/wiki/USS_Daring_(AM-87)

   Finding type

   historical_record

   Finding

   Source discrepancies logged, not silently merged: (a) Displacement - NavSource '295 t.' vs HyperWar '450 tons' vs NavSource class index 'At 450 tons full load ... 18 tons more than did the PCs' vs Wikipedia infobox '275 long tons' - 295/450 resolved as standard vs full-load conventions; Wikipedia's 275 long tons fits neither cleanly and is flagged; Colton's tonnage-column figure '1,250' reads as a different metric (possibly contract price) - flagged. (b) Draft - NavSource '6'6"' vs HyperWar '11'7"' - likely AM-fit vs PC-fit; unresolved. (c) Complement - NavSource '65' and class index 'four officers and 61 enlisted' (=65) vs HyperWar '105' - likely PC-fit crew; unresolved. (d) Speed - NavSource '16 kts' vs class index '16.8 knots at 330 tons' vs HyperWar '17 knots' - consistent range, variants flagged. (e) Propulsion - NavSource per-hull 'Two 900hp Cooper Bessemer GNB8' (=1,800 total) vs class index 'two 1,770 brake horsepower Cooper-Bessemer GNB-8 diesels' (=3,540 total) vs HyperWar '1,770 shaft hp' (total) vs Wikipedia class infobox '2 x 1,770 bhp' - the engine type (Cooper-Bessemer GNB-8, two, twin screw) is consistent; the per-engine/total rating is unresolved across sources. (f) CO roster - NavSource gives LT John Otis Phillips, Jr., USN and LT William Thomas Hunt, USN; uboat.net gives 'John Otis Phillips, USNR' and 'Lt. William Thomas Hunt, USNR' - branch conflict. NavSource ends Benham 11 May 1945 / starts Wertheimer 11 May 1945; uboat.net ends Benham 26 Jun 1945 / starts Wertheimer 26 Jun 1945 - date conflict. NavSource lists a sixth CO, LT Grant Curry, Jr., USNR (Oct 1945 - 22 Jan 1946); uboat.net's roster ends with Wertheimer 'Nov 1945' - coverage conflict, Curry unverified. (g) Class naming - Wikipedia 'PC-461-class submarine chaser' vs HyperWar 'PC-1568 class' - the ex-Adroit minecraft occupy PC-1586-1603 within the broader PC-461-type design family; naming convention unresolved, designation PC-1591 itself is uncontested. (h) Post-1948 fate - NavSource 'Fate unknown'; no buyer, site, or completion record located. (i) NavSource photo caption dates the class design plan 6 January 1941 ('Mine Sweeper - Adaptation of PC 452 Type,' NHC S-511-13) while Wikipedia/globalsecurity describe the class as 'PC-461-class submarine chasers completed as minesweepers' - consistent design lineage, different annotation.

   Verification

   partial

   Role

   correction

   Documentation level

   ship_specific

   Accessed

   2026-09-22

   Study period

   1942-1948

   Limitations

   Resolves publication-level discrepancies among the official DANFS text and secondary compilations, adopting the better-supported values and flagging the rest. None of the sources bears on asbestos; the spec conflicts are documented so no downstream user silently merges incompatible figures.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-08

9. [9]Air & Liquid Systems Corp. v. DeVries, 586 U.S. 446 (2019), CourtListener 4601080 [court_record]

   Locator

   CourtListener opinion 4601080; Google-indexed sweeps for 'USS Daring,' 'PC-1591,' 'AM-87,' 'HMS Daring,' 'Trade Daring' (search_ledger sl-06, sl-07)

   Finding type

   litigation_documented

   Finding

   No case located names this hull (see negative_finding row ev-10 and search_ledger). Doctrinal context only for the vessel's type: claims arising from Navy-vessel asbestos exposure ran under maritime law against equipment manufacturers, and the Supreme Court's DeVries decision settled the 'bare-metal defense' framework - manufacturers that supplied bare equipment had a duty to warn where their products required asbestos-containing parts. It illustrates the litigation posture a claim arising from service aboard a WWII diesel minesweeper/subchaser would have faced; no such claim naming Daring, AM-87, or PC-1591 was located. CourtListener name collisions checked and classified: 'Daring' hits in indexed opinion/docket content are Celestine Daring (a named plaintiff in the Valsartan MDL, D.N.J.) and the Liberian tankship M/V Trade Daring (Navieros Oceanikos v. Mobil Trader, 2d Cir. 1977 - a marine fire/bunkering case, not asbestos and not this hull); Royal Navy HMS Daring hulls (H16, D32) are also name collisions, not the U.S. Navy hull.

   Verification

   verified

   Role

   context

   Documentation level

   class_or_era

   Accessed

   2026-09-22

   Study period

   2019 decision; sweeps 2026-09-22

   Limitations

   Doctrinal context only - the cited case does not name or involve this hull, and DeVries addressed manufacturers' duty to warn for asbestos-containing components on Navy vessels generally (its facts post-date this hull's era). A complaint's vessel list would be a pleading allegation, not a finding; no pleading naming this hull was located. Does not establish or defeat any exposure claim or legal eligibility.

   Atlas source

   true

   Evidence ID

   ev-uss-daring-am87-09

10. [10]Batch-1438 search ledger (this record): DANFS via NavSource mirror; NavSource 11/02087 + 12/01idx class index; HyperWar Ships of the U.S. Navy PC-1591 page; Shipbuilding History Commercial Iron Works table; uboat.net; MARAD vessel history database; CourtListener API v4 (authenticated - throttled) + Google-indexed sweeps; VA BVA index via Google; live NHHC URL probes (404); Wikipedia/globalsecurity/navypedia (secondary leads); Wikimedia Commons category for NARA photo identifiers [other_primary]

    Locator

    search_ledger rows sl-uss-daring-am87-01 through sl-uss-daring-am87-12

    Finding type

    historical_record

    Finding

    No qualifying ship-specific asbestos record located for USS Daring / AM-87 / PC-1591: no asbestos survey, abatement contract, hazmat disclosure, material schedule, court finding, docketed asbestos case, or VA Board of Veterans' Appeals decision naming this hull was found in the public sources searched (see search_ledger). CourtListener coverage caveat: the authenticated API returned HTTP 429 ('Request was throttled. Rate limit exceeded: 2800/day. Expected available in 15320 seconds' - the shared quota was exhausted by earlier same-day batch work; no unauthenticated queries were run). The litigation sweep therefore ran through Google-indexed CourtListener content and general web: 'Daring' hits are name collisions (Celestine Daring, Valsartan MDL plaintiff; M/V Trade Daring, 2d Cir. 1977; HMS Daring H16/D32) and generic asbestos dockets naming no vessel; no 'PC-1591' or 'AM-87' vessel reference surfaced in any opinion or docket index reachable. Non-authoritative marketing rosters carry the name in generic ship tables (mesothelioma.com minesweepers table 'USS Daring | AM-87'; mesotheliomahelp.org and mesothelioma.net patrol-boat/minesweeper lists; freeasbestostesting.com) - excluded per source rules; they carry no hull-specific evidence.

    Verification

    verified

    Role

    negative_finding

    Documentation level

    ship_specific

    Accessed

    2026-09-22

    Study period

    2026-09-22

    Limitations

    Absence of a located public record does not prove absence of asbestos aboard - a 1942 steel-hulled naval vessel is era-consistent with asbestos-containing materials even accounting for its lighter diesel insulation load. The hull was disposed of via the Maritime Commission in 1948, so no present-day survey pathway exists. The CourtListener sweep is incomplete (shared-cap exhaustion) - a fully authenticated re-sweep of opinions and RECAP dockets remains an open verification step. Does not establish presence or absence; does not establish or defeat any exposure claim or legal eligibility.

    Atlas source

    true

    Evidence ID

    ev-uss-daring-am87-10

11. [11]Archival leads - NARA RG 24 deck logs for this hull's October 1942 - January 1946 commission (the documentary base for the Pearl Harbor/Noumea/southwest-Pacific and Ulithi/Saipan-Iwo Jima operations and any machinery-space events); WWII muster rolls; two NARA-held Bureau of Ships photographs identified via Wikimedia Commons - 'USS Daring (AM-87) off the Commercial Iron Works Portland, Oregon, 6 October 1942' (19-LCM-BS-36251 and 19-LCM-BS-36252, four days before commissioning); NHC photograph S-511-13 ('Mine Sweeper - Adaptation of PC 452 Type,' 6 January 1941 - the class design record identified on the NavSource class pages); NARA RG 19 Bureau of Ships records per the asbestos guided-topic page - hull-designation correspondence ('AM87'/'PC1591'), class correspondence under the PC-461/Adroit-class series, 'QM/Commercial Iron Works' contract files, Entry P-11 'Minesweeper and Minelayer General Information Books' (Item S-68), and hull-number-arranged Ship Engineering Drawings (S39 Insulation and Lagging, S48 Piping, S103 Booklets of General Plans); RG 181 Mare Island Naval Shipyard job files for the January 1946 decommissioning/inactivation; Pearl Harbor Naval Shipyard files for the 1944 Pacific-unit conversion modification (class-level attribution - this hull's transit is undocumented); the U.S. Maritime Commission disposal file for the 18 March 1948 transfer [other_primary]

    Locator

    archives.gov RG 19/24/181 group guides + asbestos guided-topic page (archives.gov/research/military/navy/guided-topics/asbestos - live, HTTP 200 this session); commons.wikimedia.org/wiki/Category:USS_Daring_(AM-87) (19-LCM-BS-36251/36252 identifiers); NavSource 12/01idx photo credit (NHC S-511-13)

    Finding type

    historical_record

    Finding

    Archival leads (not retrieved - require research-room or reproduction order; no spend authorized; NARA catalog returns only its JS application shell to automated fetch): (a) NARA RG 24 deck logs, Oct 1942 - Jan 1946 - the documentary base for the documented operations; (b) muster rolls for the commission period; (c) NARA photos 19-LCM-BS-36251/36252, the 6 October 1942 builder-yard images of this specific hull identified via Wikimedia Commons; (d) NHC photo S-511-13, the 6 January 1941 'Adaptation of PC 452 Type' design plan credited on NavSource class pages - the closest existing thing to a design record for the class; (e) NARA RG 19 BuShips records per the asbestos guided-topic page - hull files 'AM87'/'PC1591,' class files for the PC-461/Adroit series, 'QM/Commercial Iron Works' contract correspondence, P-11 minesweeper GIBs, and S39/S48/S103 hull-series drawings - the plausible home of hull-level material schedules; (f) RG 181 Mare Island Naval Shipyard job files for the documented January 1946 decommissioning - this hull's one ship-specifically documented Navy-yard event; (g) Pearl Harbor conversion-modification records (class-level attribution only); (h) the U.S. Maritime Commission disposal record for the 18 March 1948 transfer - the only plausible documentary path to the hull's post-1948 fate.

    Verification

    unverified

    Role

    archival_lead

    Documentation level

    context_only

    Accessed

    2026-09-22

    Study period

    1942-1948 records

    Limitations

    Record-group mapping only - no box-level retrieval performed; existence of asbestos-specific documents for AM-87/PC-1591 is unknown until surveyed in person. Deck logs, muster rolls, photographs, and contract files are personnel/operations records, not materials documentation; the BuShips design file is the best candidate for a material schedule. Nothing in this row is an asbestos finding.

    Atlas source

    true

    Evidence ID

    ev-uss-daring-am87-11