Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
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[1]research packet 375-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-ix-524-ix524-pkt-375-packet-md
-
[2]Bureau of Yards and Docks, Building the Navy's Bases in World War II, History of the Bureau of Yards and Docks and the Civil Engineer Corps 1940-1946, Chapter IX: Floating Drydocks (USGPO 1947; HyperWar mirror) [other_primary]
- Locator
- Chapter IX, 'Advance Base Sectional Dock' design description (sections, compartments, machinery)
- Finding type
- asbestos_application
- Finding
- The official BuDocks history describes each ABSD section as a self-contained industrial unit: a bottom pontoon subdivided into twelve ballast compartments plus a central buoyancy compartment containing crew's quarters (upper deck) over a machinery compartment (lower deck); 20-ft-wide, 55-ft-high wing walls whose dry compartments were 'completely utilized for shops, storage, and similar facilities'; quarters and galleys in the bottom pontoons; and per section 'two 525-h.p. diesel engines directly connected to 350-k.w. generators, and with pumps, evaporators, compressors, and heating and ventilating apparatus.' For a 1943-44 steel auxiliary of this equipment profile, era-typical asbestos applications would have included engine exhaust and piping insulation, flange gaskets, valve and machinery packing, electrical cable insulation, thermal insulation and fireproofing in quarters and galley spaces, floor coverings, and brake linings on capstans and cranes.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1943-1946
- Population
- Construction trades (Mare Island NSY, 1943-44); dock crew complement (wartime)
- Limitations
- Design/type documentation, not a hull record - the BuDocks history describes the ABSD type generally and does not name Section F or state 'asbestos' content; asbestos presence aboard this section is era/design inference, not ship-proven. Does not establish quantity, location, present-day presence, individual exposure, or causation. The MATSS conversion removed the wing walls, so a portion of the as-designed asbestos-relevant spaces no longer exists on the craft.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-01
-
[3]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
- Abstract and article, AJIM 11(3):359-373
- 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 era and program under which this 1943-44 steel floating-drydock section was built at a naval shipyard.
- 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 ship crews (class context)
- Limitations
- Program/era-level scholarly documentation of asbestos use in WWII shipbuilding generally; does not name this craft and does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, exposure, or causation.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-02
-
[4]US EPA Superfund site profile, Mare Island Naval Shipyard, EPA ID CA7170024775 (federal facility, state-lead cleanup); California DTSC Mare Island Basewide Environmental Baseline Survey and remedial documents recording asbestos-containing material in shipyard buildings, steam pipe insulation, floor tile, and transite [other_primary]
- Locator
- EPA SEMS/Superfund profile CA7170024775; DTSC EnviroStor Mare Island Basewide EBS (ACM confirmed in floor tiles, transite, steam pipe insulation, and steam pipe joint insulation)
- Finding type
- environmental_record
- Finding
- Mare Island Naval Shipyard, the builder of AFDB-2 including Section F, is an EPA-documented federal cleanup site (CA7170024775); Navy Installation Restoration Program and DTSC oversight records document asbestos-containing material in the yard's buildings, steam pipe insulation, floor tile, and transite panels, with asbestos abatement required during building demolition.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-29
- Study period
- Site documentation 1990s-2000s; construction era 1943-44
- Population
- Mare Island Naval Shipyard workforce (context)
- Limitations
- Builder-yard context only - documents asbestos in Mare Island's shore-side buildings and utility infrastructure, not aboard any hull built there. Establishes nothing about Section F's materials; included only as construction-site context for a 1943-44 naval-built craft.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-03
-
[5]NavSource Online, Service Ship Photo Archive: 'IX-522 (D) / IX-524 (F) / IX-535 (H) ex AFDB-2 (1946-1990) USS ABSD-2 (1944-1946)' (page last updated 20 June 2014); corroborated by NavalCoverMuseum AFDB-2 entry [other_primary]
- Locator
- NavSource archives/09/28/2892.htm, 'Final/Current Disposition' list and IX-522/524/535 specifications block; NavalCoverMuseum AFDB-2 name/designation list
- Finding type
- vessel_history
- Finding
- Identity chain and milestones for this craft: Section F of the ten-section AFDB-1-class large auxiliary floating drydock ABSD-2/AFDB-2, built in sections at Mare Island Navy Yard, Vallejo CA (1943-44), delivered April 1944; the assembled dock commissioned as USS ABSD-2 on 14 August 1943 (CDR Joseph J. Rochefort commanding), towed to Espiritu Santo and assembled for operation at Manus, Admiralty Islands; decommissioned 28 February 1946; redesignated AFDB-2 August 1946. Section F reclassified Unclassified Miscellaneous IX-524 on 19 July 1990; disposition Pacific Missile Range Facility, Kekaha, HI. Section specifications: 3,500 t displacement, 280 ft length, 80 ft beam, 9 ft draft (light). Call sign NIGZ. No DANFS history exists for ABSD-2/AFDB-2.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-2014
- Limitations
- Secondary compilation (NavSource), not a primary record; dates corroborated by NavalCoverMuseum but conflict with ShipbuildingHistory.com's NVR-derived table (disposals 1987, IX-524 reclassification 1997) - both retained in gaps. Direct NVR verification blocked (JS-rendered site, no Wayback capture). Contains no asbestos, materials, or condition-survey information; supports no asbestos claim.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-04
-
[6]US Navy / US National Archives photographs cataloged on the NavSource ABSD-2 page: NARA 80-G-304096 and 80-G-304088 (Canberra CA-70, Killen DD-593, Claxton DD-571 in dock, Manus, 2 Dec 1944); Mississippi BB-41 in dock 12 Oct 1944; Iowa BB-61 in dock Dec 1944 [other_primary]
- Locator
- NavSource 2892.htm photo table; Wikipedia AFDB-2 'World War II' and 'Attacked' sections for repair list and 27 Apr 1945 torpedo damage (secondary corroboration)
- Finding type
- historical_record
- Finding
- Wartime operational record of the parent dock to which Section F belonged: ABSD-2 at Seeadler Harbor, Manus, serviced major combatants - USS Mississippi (BB-41) on 12 October 1944, and battle-damaged USS Canberra (CA-70), USS Killen (DD-593), and USS Claxton (DD-571) on 2 December 1944; USS Iowa (BB-61) docked before her early-1945 refit. A Japanese aerial torpedo damaged Section G on 27 April 1945. The dock worked as a crewed industrial plant (wartime complement 690) cutting, welding, pumping, and repairing hulls continuously.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1944-1945
- Population
- ABSD-2 wartime complement (~690); crews of docked ships
- Limitations
- Documents dock-level operations; Section F is one of ten interchangeable sections and its individual section-level service is not separately recorded. Photographs are US Navy/NARA images; contains no asbestos information - supports identity and occupational context (industrial repair work aboard) only, not any exposure finding.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-05
-
[7]DVIDS image 449267 (VIRIN 110824-N-BA377-005), U.S. Navy photo by Troy Clarke, Pearl Harbor, 24 August 2011; companion images VIRIN 110824-N-BA377-035 and -047 [other_primary]
- Locator
- DVIDS image page metadata (Date Taken 08.24.2011, VIRIN 110824-N-BA377-005, location Pearl Harbor, Hawaii)
- Finding type
- vessel_history
- Finding
- Official U.S. Navy imagery documents IX-524 as the Mobile At-Sea Sensor (MATSS) barge in crewed operational status: 'Engineers and technicians aboard Mobile At-Sea Sensor (MATSS) barge (IX-524) conduct final preparations before upcoming flight test mission FTM-16.' Caption text states MATSS 'provides advanced remote telecommunications capability that extends the reach of the 42,000 square-mile Pacific Missile Range.' Personnel documented aboard include a Navy officer-in-charge (Lt.) and civilian telecommunications and systems engineers - i.e., the craft is occupied/worked during test operations, not merely moored.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2011
- Population
- MATSS crew: Navy detachment plus contractor engineers (2011-present)
- Limitations
- Documents role and crewed status at Pearl Harbor in 2011; contains no asbestos or materials information. MATSS acronym expansion varies by source ('Mobile At-Sea Sensor' per official Navy captions; 'Mobile Aerial Target Support System' in 2000-era press and program literature) - same program/barge under evolving naming.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-06
-
[8]U.S. Department of Defense, Contracts for March 6, 2023 - Integrits Corp. award announcement, contract N32253-23-D-0002 [other_primary]
- Locator
- war.gov contracts post, March 6, 2023, contract N32253-23-D-0002
- Finding type
- vessel_history
- Finding
- DoD contract announcement: Integrits Corp., San Diego, awarded a $14,918,694 cost-plus-fixed-fee IDIQ contract 'for the procurement of operation and maintenance support for the Mobile At-Sea Sensor System (MATSS) vessel at Pearl Harbor Naval Shipyard and Intermediate Maintenance Facility, Hawaii' (options to $18,755,728); work performed at Joint Base Pearl Harbor-Hickam, expected completion March 2025 with options through September 2025; NAVSEA Pearl Harbor NSY & IMF is the contracting activity.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2023-2025
- Population
- PHNSY & IMF / Integrits Corp. maintenance workforce
- Limitations
- Confirms the MATSS vessel is active and under recurring Navy maintenance through at least September 2025. The announcement contains no asbestos, hazmat, or condition-survey content; any abatement performed under this or prior O&M contracts is not described in public records.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-07
-
[9]Maritime Hawai'i, 'IX-524 (MATSS-1) in Dry Dock,' 12 October 2025; The Garden Island (Kauai), 'MATSS platform one step closer to supporting TBMD,' 17 March 2000 [reputable_press]
- Locator
- maritimehawaii.com/2025/10/ix-524-matss-1-in-dry-dock/ (photo caption and text); thegardenisland.com/2000/03/17/ MATSS TBMD article
- Finding type
- vessel_history
- Finding
- Local maritime press documents the craft's current status and conversion history: The Garden Island reported 17 March 2000 that 'a World War II era section of floating dry dock has been revamped' as the Mobile Aerial Target Support System and had passed open-sea helicopter landing tests ahead of Theater Ballistic Missile Defense testing; Maritime Hawai'i photographed IX-524 hauled out on Pacific Shipyards International's floating drydock Ho'ola I Na Moku at Pier 24, Honolulu Harbor on 7 September 2025, describing it as a PMRF-operated platform for telemetry, tracking, and communications systems.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 2000; 2025
- Population
- PMRF/contractor test crews; commercial drydock workforce (2025)
- Limitations
- Reputable local press, not official records; the September 2025 commercial drydocking is documented by photograph only - no work-scope, survey, or hazmat disclosure accompanies it. Conversion date is established only to 'by March 2000'; the exact reclassification-to-MATSS timeline is not public.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-08
-
[10]ShipbuildingHistory.com (T. Colton), 'US Navy Dry Docks AFDB AFDM AFDL ARDM ARD YFD' table, AFDB-2 section rows (update of 11 June 2019) [other_primary]
- Locator
- shipbuildinghistory.com/smallships/auxafd.htm, AFDB-2 section rows (AFDB 2A-2J)
- Finding type
- vessel_history
- Finding
- NVR-derived compilation conflicts with NavSource/NavalCoverMuseum on this craft's milestone dates: ShipbuildingHistory records AFDB-2 sections A and G 'scrapped 1987,' sections B, C, and J 'sunk as target 1987,' and Section F 'reclassified IX 524 1997' - versus NavSource/NCM's uniform 13 July 1990 disposals and 19 July 1990 IX-524 reclassification. The table also lists section displacement 3,850 tons and dimension 93 ft (vs NavSource 3,500 t / 280 ft / 80 ft beam).
- Verification
- disputed
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1987-2002
- Limitations
- Secondary compilation of Naval Vessel Register data; the discrepancy is unresolved - NVR itself could not be retrieved (JS-rendered site; no Wayback capture). Neither date set is treated as authoritative; both are carried in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-09
-
[11]National Archives and Records Administration: WWII-era deck logs and war diaries for USS ABSD-2 (RG 24 deck logs; RG 38 war diaries), National Archives at College Park; Mare Island NSY construction records for AFDB-2 sections [other_primary]
- Locator
- NARA College Park, RG 24 (deck logs) / RG 38 (war diaries); NAVSEA/PMRF contract files (not public)
- Finding type
- historical_record
- Finding
- The likeliest repositories of section-level primary documentation: ABSD-2 deck logs and war diary (NARA College Park, RG 24/RG 38 series), Mare Island Naval Shipyard construction records for the AFDB-2 sections (which may include material specifications), and NAVSEA/PMRF contract files for the 1990s IX reclassification and circa-1999-2000 MATSS conversion - the most probable home of any hazmat or material-survey record touching this craft.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-present
- Limitations
- Archival lead only - none of these holdings has been retrieved or reviewed; no digitized ABSD-2 deck log, war diary, or MATSS conversion record was located in public sources. They may contain no asbestos information at all.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-10
-
[12]Batch-4830 search ledger (this record): NavSource, ShipbuildingHistory, NavalCoverMuseum, DVIDS, DoD contracts, Maritime Hawai'i, The Garden Island, BuDocks official history, EPA/DTSC site records, NHHC/DANFS, NVR, Wayback, CourtListener [other_primary]
- Locator
- search_ledger rows sl-uss-ix-524-01 through sl-uss-ix-524-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming IX-524, ABSD-2, AFDB-2, or MATSS was found in the public sources searched (see search_ledger). No DANFS entry exists for the craft.
- 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 1943-44 naval-built industrial craft is consistent with era-standard asbestos-containing materials, and the MATSS conversion/recurring maintenance records that might document material condition are not public. Does not establish that asbestos is or is not present; does not establish or defeat any claim of exposure or legal eligibility. CourtListener sweep status is recorded in search_ledger.
- Atlas source
- true
- Evidence ID
- ev-uss-ix-524-11