Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
-
[1]research packet 365-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (with correction, see note) — real identity: USS Chocura (IX-206) — ex-USS PC-1124
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-chocura-ix206-pkt-365-packet-md
-
[2]Dictionary of American Naval Fighting Ships, 'Chocura II (IX-206)' (NHHC; Wayback capture 2024-05-26 - live NHHC page returns 404) [nhhc_danfs]
- Locator
- DANFS Chocura II (IX-206) entry, Wayback capture 2024-05-26
- Finding type
- vessel_history
- Finding
- DANFS records the second Chocura: 'PC-1124 (q.v.) was renamed Chocura (IX-206) 20 February 1945.' The name is a variant spelling of Mount Chocorua, New Hampshire.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1945
- Limitations
- Stub entry - contains no construction, service, casualty, or material detail and no asbestos information. Confirms only the hull identity chain PC-1124 to Chocura (IX-206) and the 1945-02-20 rename/reclassification date. Live NHHC URL 404s (standing NHHC link rot per BATCH-01); Wayback capture cited.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-01
-
[3]NavSource Online, Submarine Chaser Photo Archive: Chocura (IX 206) ex-PC-1124 page [other_primary]
- Locator
- navsource.net/archives/12/011124.htm - narrative block and specifications table
- Finding type
- vessel_history
- Finding
- Secondary-compilation narrative: laid down 1942-08-04 as PC-1124 by Defoe Shipbuilding Corp., Bay City, MI; launched 1942-10-01; commissioned USS PC-1124 1943-05-24; heavily damaged 1944-11-24 by Japanese dive bombers off Leyte at 10 deg 50' N, 125 deg 25' E; named and reclassified as unclassified miscellaneous auxiliary Chocura (IX-206) 1945-02-20 and used as a barracks ship; hulk sunk October 1945 off Manus, Admiralty Islands. Photo captions on the page document the ship 'after enemy bombing attack' and 'in dry dock at Manus, Admiralty Islands' c.1945. Class specs listed: 280 t (lt) / 450 t (fl), 173'8" x 23' x 10'10", 20.2 kts, complement 65, two 1,440 bhp GM 16-258S diesels with Farrel-Birmingham single reduction gear, two shafts.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1942-1945
- Population
- Ship's company (PC-era complement listed as 65, class-standard); barracks-ship complement at Manus undocumented
- Limitations
- NavSource is a volunteer secondary index compiled from official records, not itself an official document; carried because its narrative is corroborated at every overlapping point (DANFS rename date, NHHC chronology damage entry, Defoe yard record, shipscribe register mapping). Contains no asbestos or material-content information. Complement 65 is class-standard and unverified against NHHC.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-02
-
[4]uboat.net Allied Warships, USS PC-1124 (PC-1124) vessel page (compiled from official sources incl. RAN reports of proceedings) [other_primary]
- Locator
- uboat.net/allies/warships/ship/8669.html - Commands and Notable events sections
- Finding type
- vessel_history
- Finding
- Service-history detail: ordered 1942-02-27 (unverified against contract records); commanding officers Lt. Robert F. Sheffield, USNR (1943-05-24 to mid-1944) and Lt. S. A. Scribner, USNR (mid-1944 to early 1945). Documented operation: October 1943 escort of convoy TN-170, Townsville to New Guinea, with HMAS Arunta, HMAS Stuart, and USS Conyngham - sourced to the Australian destroyers' reports of proceedings. Confirms the hull's wartime employment as convoy escort/patrol craft in the Southwest Pacific before the 1944-11-24 battle damage.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-1944
- Population
- Ship's company, 1943-1944
- Limitations
- Secondary warship index citing RAN official reports for the convoy event; ordered date and CO roster are compilation data not verified against Navy registers. Contains no asbestos or material-content information.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-03
-
[5]Robert J. Cressman, The Official Chronology of the U.S. Navy in World War II (Naval Historical Center), November 1944 chapter (HyperWar transcription) [other_primary]
- Locator
- chr44-11.html, entry under 11/24 Fri.
- Finding type
- vessel_history
- Finding
- The official NHHC chronology records for 1944-11-24: 'United States naval vessel damaged: Submarine chaser PC-1124, by dive bomber, Leyte area, P.I., 10 d. 50'N., 125 d. 25'E.' This is the battle-damage event that ended the hull's combat employment; it was renamed Chocura (IX-206) three months later and used as a barracks ship.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1944-11-24
- Population
- Ship's company aboard PC-1124 at time of attack, 1944-11-24
- Limitations
- Chronology entry documents the damage event and position only - no damage scope, casualty, repair, or material-content detail. Does not itself connect the damage to the IX conversion (NavSource/register data supply that sequence). No asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-04
-
[6]Dictionary of American Naval Fighting Ships, 'Severn IV (AO-61)' entry (navysite.de verbatim transcription; live NHHC page 404s) [nhhc_danfs]
- Locator
- DANFS Severn IV (AO-61) entry, November 1944 passage; mirror at navysite.de/ao/ao61.htm
- Finding type
- vessel_history
- Finding
- DANFS's Severn entry supplies the attack circumstance: 'on the 24th, an enemy plane penetrated the CAP cover and released a bomb aimed at the water carrier. The bomb missed Severn, but hit PC-1124 then receiving water.' Severn was discharging fresh water in San Pedro Bay, Leyte Gulf, at the time - i.e., PC-1124 was struck while alongside Severn taking on water.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1944-11-24
- Population
- Ship's company of PC-1124; Severn crew in proximity
- Limitations
- Establishes the circumstance of the hit (alongside AO-61 receiving water, San Pedro Bay) but not damage extent, casualties, or repair details. Cited via transcription mirror because live NHHC 404s (standing link rot). Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-05
-
[7]Stephen S. Roberts, shipscribe.com U.S. Navy auxiliary register, 'Unclassified (IX): Special Types' cross-reference (compiled from official registers/records) [other_primary]
- Locator
- shipscribe.com/usnaux/IX3/IX3type.html - 'Miscellaneous Types (4)' group and Other IX hull numbers list
- Finding type
- vessel_history
- Finding
- Register cross-reference lists 'IX-206 (Chocura): ex PC-1124' among IX hulls reclassified Dec. 1943-Sept. 1945, and separately 'IX-211 (Castine): ex PC-452' and 'IX-221 (Eureka): ex PC-488' - resolving the ex-hull assignments against each other and against DANFS.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1945
- Limitations
- Secondary compilation of official register records, not itself an official document; carries the hull-number mapping only - no service narrative or material detail. No asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-06
-
[8]HyperWar 'Ships of the U.S. Navy, 1940-1945' IX table (ibiblio.org/hyperwar/USN/ships/ships-ix.html) and companion subchaser table (ships-sc.html) [other_primary]
- Locator
- ships-ix.html IX-206 and IX-211 rows; ships-sc.html PC-1124 row
- Finding type
- historical_record
- Finding
- The compiled tabular reference contains conflicting assignments: its IX table lists 'IX-206 Chocura ... Converted from Sub Chaser PC-452' while its PC table lists PC-1124 'Converted to Unclassified Vessel IX-221.' Both are contradicted by DANFS (PC-1124 renamed Chocura IX-206, 1945-02-20) and by the shipscribe register cross-reference (IX-206 ex PC-1124; IX-211 Castine ex PC-452; IX-221 Eureka ex PC-488). The HyperWar/table errors propagate to derivative indexes (e.g., Wikipedia's IX list 'Chocura (IX-206), ex-PC-452'; totalnavy.com 'PC-1124 ... IX-221').
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1945 (subject); reference compilation
- Limitations
- Correction is documented from DANFS (controlling) plus an independent register compilation; the underlying wartime Ship's Data print volumes were not consulted page-image. Derivative-source errors flagged so downstream users do not conflate this hull with PC-452 (Castine IX-211) or PC-488 (Eureka IX-221).
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-07
-
[9]ShipbuildingHistory/Naval Marine Archive, Defoe Shipbuilding yard list (Bay City, MI): hull 209 = PC-1124 [other_primary]
- Locator
- defoe.html yard table, hull 209 row
- Finding type
- historical_record
- Finding
- The Defoe yard construction list records hull no. 209 as PC-1124, US Navy subchaser (PC-461 design, 173 ft), delivered 1943-05-24, 'damaged off Leyte 1944 and reclassified 1945 as barracks ship Chocura (IX 206), scuttled 1945' - corroborating the builder, yard number, delivery date, and end-state at the yard level.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1942-1943
- Population
- Defoe Shipbuilding construction workforce, Bay City, MI (1942-1943)
- Limitations
- Secondary yard-list compilation consistent with NavSource and uboat.net data; delivery date coincides with commission date (24 May 1943). No material-content or asbestos information. Establishes the construction-workforce population at Bay City only.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-08
-
[10]ATSDR Case Studies in Environmental Medicine (CSEM), 'Asbestos Toxicity: Where Is Asbestos Found?' (CDC archive) [other_primary]
- Locator
- ATSDR CSEM asbestos course, 'Where Is Asbestos Found?' page (archived CDC copy)
- Finding type
- asbestos_application
- Finding
- ATSDR states: 'Until the 1970s, asbestos was widely used in the construction, shipbuilding, and automotive industries,' listing among former uses boilers and heating vessels, pipe covering, insulation products, and heat-resistant textiles, and notes these materials 'remain in many buildings, ships, and automobiles built before 1975.' A 1942-1943 steel diesel submarine chaser falls within this documented era of shipboard asbestos use (exhaust and machinery insulation, gaskets, packing, electrical insulation, bulkhead insulation, brake linings).
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-29
- Study period
- 1942-1945
- Population
- Defoe construction workforce (1942-1943); PC-1124 ship's company (1943-1945); battle-damage repair crews (1944-1945); barracks-phase occupants and scuttling crews (1945)
- Limitations
- Industry-level public-health documentation; does not name this hull or the PC-461 class and does not establish that asbestos was or is present aboard PC-1124/Chocura. Era-consistent inference only - no quantity, product identity, or individual exposure is established. Diesel plant means no boiler lagging; the era-consistent applications differ from steam hulls.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-09
-
[11]National Archives deck-log holdings for PC-1124 (catalog listing per batch assignment: logs span 1943-05-24 to 1945-03-17) within the 'Logbooks of the U.S. Navy Ships and Stations, 1941-1978' series (NAID 594258; RG 24) [other_primary]
- Locator
- archives.gov/research/military/logbooks/navy (RG 24 guidance) and /navy-online digitized lists (ship absent)
- Finding type
- historical_record
- Finding
- NARA holds PC-1124 deck logs spanning 1943-05-24 (commissioning) to 1945-03-17 in the standard RG 24 deck-log series at College Park. The ship does not appear on NARA's published digitized-log lists, so the volumes are undigitized; logs would chronicle daily operations, the 1944-11-24 attack aftermath, damage-control entries, and the February-March 1945 conversion period.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-29
- Study period
- 1943-1945
- Population
- Ship's company, 1943-1945
- Limitations
- Holdings-level lead: the PC-1124 log span (1943-05-24 to 1945-03-17) is carried from the NARA catalog listing supplied in the batch assignment; the catalog's JavaScript search could not be queried remotely to confirm a NAID this session. The span ends 1945-03-17 - post-rename Chocura (IX-206) logs, if separately cataloged, are an additional open lead. Deck logs record events, not material composition; asbestos content unlikely but unverified.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-10
-
[12]Batch-4764 search ledger (this record): NHHC/DANFS live and Wayback; NavSource; NHHC official chronology; DANFS Severn IV (transcription mirrors); shipscribe IX register; HyperWar ship tables; Defoe yard list; NARA logbook guidance and digitized lists; CourtListener ship-name and hull-number search; Atlas shipyards.json yard cross-check [other_primary]
- Locator
- search_ledger rows sl-uss-chocura-ix206-01 through sl-uss-chocura-ix206-13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or docketed case naming PC-1124 or Chocura (IX-206) was found in the public sources searched (see search_ledger). The authenticated CourtListener API sweep could not run this pass (fleet pacing budget exhausted on five spaced attempts; helper directed stand-down); a site-scoped courtlistener.com index check returned only numeric/docket-number collisions - nothing naming the vessel.
- 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 1942 hull scuttled in 1945 predates every asbestos survey regime. The litigation sweep is partial: the authenticated CourtListener run remains unexecuted and a name as rare as Chocura is low-collision, so a clean re-run should be quick. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-chocura-ix206-11