Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 495-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-lcs-l-3-12-lcsl312-pkt-495-packet-md
-
[2]NavSource Online Amphibious Photo Archive, USS LSSL-12 ex USS LCS(L)(3)-12 page (construction, designation timeline, campaigns, awards, specifications, disposition) [other_primary]
- Locator
- NavSource page 050012 - class header block, campaign table, timeline, and Specifications block
- Finding type
- vessel_history
- Finding
- Documented for this hull: laid down 14 August 1944 at George Lawley & Sons Corp., Neponset, MA; launched 24 August 1944; commissioned USS LCS(L)(3)-12, 17 September 1944, LTjg. George J. O'Hare USNR in command. Assigned to the Asiatic-Pacific Theater as flagship of LCS(L)(3) Group Eight (LCDR E. C. Thomas USNR), LCS(L)(3) Flotilla Three (CAPT T. C. Aylward USN), Division Fifteen. Campaigns: Okinawa Gunto operation (assault and occupation, 26 March - 25 June 1945); Minesweeping Operations Pacific, Fukuoka (Kyushu-Korea area), 10-24 December 1945. China Service 4 October 1945 - 5 February 1946. Decommissioned date unknown; laid up Pacific Reserve Fleet; redesignated USS LSSL-12, 28 February 1949; transferred to Japan 30 June 1953 as JDS Sekichiku; returned to U.S. custody 30 June 1958; struck from the Naval Register, date unknown; recommended for disposal and use as a target, sunk by gunfire 12 March 1959. Two battle stars for WWII service. Specifications: 250 t light / 387 t full, 158 ft o.a., beam 23 ft 8 in, 16.5 kt max; complement 6 officers + 65 enlisted; propulsion two quad packs of four General Motors 6-71-series diesel engines per shaft (1,600 bhp total), GM reduction gears, two diesel-driven 60 kW ship's-service generators, twin variable-pitch propellers; armament bow gun mount, two twin 40mm AA mounts, four single 20mm AA mounts, four .50 cal machine guns, ten Mk 7 rocket launchers.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-30
- Study period
- 1944-1959
- Population
- George Lawley & Sons construction trades (1944); wartime crew (design complement 6 officers + 65 enlisted); JMSDF crew 1953-58
- Limitations
- NavSource documents identity, milestones, service narrative, and published specifications - it contains no materials or asbestos information and does not address exposure. Armament on this page's spec block reads 'one single 40mm gun mount' at the bow; sister-hull pages (e.g., LCS(L)(3)-50) list a 3"/50 dual-purpose bow gun - configuration varied and the discrepancy is carried in gaps rather than resolved.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-01
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[3]Lt.(jg) George J. O'Hare (commanding officer), 'A Brief History of LCS(L)-12,' unit history hosted by NavSource via the National Association of USS LCS(L) 1-130 [other_primary]
- Locator
- NavSource page 050012h - 'A Brief History of LCS(L)-12' by LTjg O'Hare, full narrative
- Finding type
- vessel_history
- Finding
- The commanding officer's own narrative for this hull: commissioned as flagship of LCS(L) Group Eight at George Lawley Shipbuilding Company, Neponset, MA, 17 September 1944; departed Boston 25 September for Solomons, MD; shakedown and post-shakedown availability in the Chesapeake Bay area; departed Norfolk 21 October for Coco Solo, CZ (arrived 31 October); transited the Panama Canal 3 November; San Diego 14 November - training in landings, shore bombardment, amphibious doctrine. Sailed 4 January 1945 with most of Group Eight, Flotilla Three, for Pearl Harbor (arrived 13 January, nested West Loch); departed 2 February for the Southern Solomons (Purvis Bay 17 February); staged for Okinawa via Ulithi (12-21 March); jumped off with Fifth Fleet elements 25 March. Led Group Eight in the initial assault on the beaches of Okinawa on Easter Sunday, delivering rocket and gunfire ahead of troop landings. Of 86 days in the Okinawa area: 43 days radar picket duty, plus anti-small-boat patrol, anti-aircraft and smoke screening; participated in the capture of Tori Shima 12 May. Credited with shooting down four Japanese planes, assisting in destruction of four more, probably a ninth, and probably destroying two suicide boats; General Quarters sounded 195 times totaling 144 hours. Recommended for the Navy Unit Commendation. Group Eight commander and staff shifted to LC(FF) 485 in early May. Postwar: Leyte Gulf 30 June; sailed 11 September for Tokyo Bay en route to occupation of northern Honshu; delayed by typhoon 16-18 September; Aomori occupation 25 September; moored Nagaura Ko off Yokosuka Naval Base 9 October; Yokohama 13-24 October; Sasebo 28 October; ordered to Buckner Bay, Okinawa, 10 November, arrived 12 November.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-30
- Study period
- 1944-1945
- Population
- Wartime crew (~71)
- Limitations
- A first-person unit history provided to NavSource by the ship's commanding officer via the class association - detailed and contemporaneous but not an official record; it documents operations only, no materials or asbestos content. Its builder name ('George Lawley Shipbuilding Company') differs slightly from NavSource's 'George Lawley & Sons Corp.' - both forms refer to the Neponset yard.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-02
-
[4]NARA file units: 'LCS(L) (3) 12 - Muster Rolls' (NAID 120318905, 109 scanned frames, first muster roll dated 1944-09-17 - commissioning day; NAID 120281965, 32 frames, incl. roll dated 1945-03-31), National Archives at College Park, microfilm scanned under the Ancestry partnership [other_primary]
- Locator
- catalog.archives.gov file units NAID 120318905 and NAID 120281965 (digitalObjects attached)
- Finding type
- historical_record
- Finding
- Hull-specific personnel records exist and are digitized: two NARA muster-roll file units for 'LCS(L) (3) 12' hold 141 scanned frames naming the crew from commissioning (17 September 1944) forward - the authoritative source for who served aboard this hull and when.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-30
- Study period
- 1944-1945
- Population
- Crew of LCS(L)(3)-12, 1944-45 (names recoverable frame-by-frame)
- Limitations
- Archival lead only - the muster rolls are personnel rosters; they establish who was aboard, not what materials they encountered. Muster rolls never document asbestos. Full frame-level review not performed.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-03
-
[5]NARA file units (WWII War Diaries microfilm series, Fold3 scans): 'LCS(L)-12 - War Diary, 5/1/45 to 6/24/45' (NAID 101712347); 'LCS(L)(3)-12 - Rep of action with enemy small craft off Okinawa Jima, 5/4/45' (NAID 101759217); 'LCS(L)(3)-12 - Rep of opers in the invasion of Tori Shima, 5/12/45' (NAID 101759221); 'LCS(L)(3)-12 - Rep of AA act off Okinawa Jima, 5/28/45' (NAID 140030961); 'LCS(L)(3)-12 - Rep of AA Actions off Okinawa Jima, 6/6/45' (NAID 101707983); 'COM LCS(L)(3) GR 8 - War Diary, 10/7/44 to 11/14/44' (NAID 78671782) [other_primary]
- Locator
- catalog.archives.gov file units NAID 101712347, 101759217, 101759221, 140030961, 101707983, 78671782 (digitalObjects attached)
- Finding type
- historical_record
- Finding
- Hull-specific operational records exist and are digitized in the NARA catalog: this vessel's own war diary for 1 May - 24 June 1945 and four action reports it filed off Okinawa (small-craft action 4 May; Tori Shima invasion 12 May; AA actions 28 May and 6 June 1945), plus the LCS(L)(3) Group Eight war diary for 7 October - 14 November 1944 covering the flagship's transit to the Pacific. These are the primary-source operational record of the hull.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-30
- Study period
- 1944-1945
- Population
- Wartime crew; Group Eight flag staff embarked
- Limitations
- Archival lead only - war diaries and action reports document operations, not materials aboard; none is expected to mention asbestos. Frame-level review not performed. Deck logs (RG 24) for this hull are held at NARA but their digitization status for this hull was not confirmed.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-04
-
[6]NPS National Register of Historic Places nomination, LCS-102 (NRHP 15000716, listed 13 October 2015) - class-level design and production documentation for the LCS(L)(3) type [nps]
- Locator
- NRHP nomination 15000716, Section 7 (description) and Section 8 (Criterion C discussion, yard production split)
- Finding type
- historical_record
- Finding
- Class documentation for the type: the LCS(L)(3) is a shallow-draft, all-welded-steel gunboat 158 ft long, beam 23 ft 3 in, displacing 387 tons full load / 250 tons light, designed to accompany landing craft ashore and provide close-in fire support; crew 65 enlisted + 6 officers; contracts for 130 hulls built 1944-45 across three yards - George Lawley & Sons, Neponset MA (47 hulls, the yard that built this vessel); Albina Machinery, Portland OR (31); Commercial Iron Works, Portland OR (52). LCS-102 is the sole intact survivor of the class. Hull construction: second deck with crew quarters, wardroom, crew mess, first-aid station, magazine, engine compartments; 26 fuel/oil/water tanks below.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-30
- Study period
- 1944-1945 (class); nomination 2015
- Population
- Construction trades at three yards, 1944-45; class crews
- Limitations
- NPS nomination documents class design and production; it names this hull's builder class but not this hull specifically. The nomination contains no asbestos or insulation-content information - the text was searched; nothing found. Hull 12 was Lawley-built; the nomination's surviving-example detail describes Commercial Iron Works-built LCS-102.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-05
-
[7]Era inference built on: NavSource specifications block (all-diesel GM plant, welded construction per NPS nomination); NPS NRHP 15000716 (machinery-space layout, all-welded steel hull); GAO HRD-80-2 (Navy asbestos-use era, see ev-07) [other_primary]
- Locator
- NavSource specifications block (050012); NPS nomination 15000716 machinery arrangement; GAO HRD-80-2 era framing
- Finding type
- asbestos_application
- Finding
- A welded-steel amphibious gunboat built August-September 1944 inside the Navy's documented asbestos-use era: era-standard applications aboard a small diesel warship of this type and period were thermal insulation in machinery spaces and exhaust runs, gaskets and valve packing in fuel/lube/fresh-water systems, electrical insulation, and fireproofing/firefighting textiles - in a hull ~158 ft long where 71 men worked in confined spaces. The all-diesel plant (two quad packs of GM 6-71 engines) means no steam plant aboard - the boiler/steam-line lagging pathway of steam vessels does not apply; the diesel confined-space dynamic (machinery spaces, exhaust lagging, gaskets, packing) is the relevant pathway.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-30
- Study period
- 1944-1959
- Population
- George Lawley & Sons construction trades (Aug-Sep 1944); crew 1944-46; Pacific Reserve Fleet maintenance; JMSDF crew 1953-58
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, builder's spec, or work package located for LCS(L)(3)-12. Names era-standard applications, not confirmed installed materials. No quantity. No manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-06
-
[8]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 (1944) and U.S. service era.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-30
- 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 2026-09-30) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-07
-
[9]Batch-5669 search ledger (this record): NavSource hull page + CO unit history; NARA catalog proxy search (muster rolls, war diary, action reports); NPS NRHP 15000716; shipbuildinghistory class table; NHHC/DANFS index (no entry exists for this numbered craft); NVR (pre-1987 disposal - not in register); CourtListener opinions search; secondary litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-lcs-l-3-12-lcsl312-01 through -09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS LCS(L)(3)-12 / LSSL-12 was found in the public sources searched. CourtListener opinion search for exact designations returned zero hits; the only 'asbestos aboard' material surfaced anywhere is law-firm marketing content (mesowatch.org lists the builder yard in generic terms) with no primary sourcing - excluded by source policy.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-30
- Study period
- 2026-09-30
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1944-built Navy vessel of this era is a reasonable era-consistent inference for asbestos-containing insulation, gaskets and packing, but that is not ship-proven. CourtListener docket-level (type=r) search could not be completed before report write-up (fleet pacing) - logged separately in the ledger; do not read this row as a litigation-negative finding beyond the completed opinion search. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-lcs-l-3-12-lcsl312-08