Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 909-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-573-pc573-pkt-909-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, PC-573 (build dates, builder, disposal, specifications, photo record) [other_primary]
- Locator
- NavSource 12/010573.htm header block, specifications block, photo caption (dry dock, Puerto Rico)
- Finding type
- vessel_history
- Finding
- NavSource record for this hull (call sign Nan-Item-Dog-Yoke): PC-461-class submarine chaser laid down 14 October 1941 by the Dravo Corp., Neville Island, Pittsburgh, PA; launched 5 March 1942; commissioned 13 June 1942; transferred to the Maritime Commission 23 June 1948 and sold to the Mill Basin Ship Repair Co. of Brooklyn, NY; 'Fate unknown.' Specifications: displacement 450 t.; length 173'8"; beam 23'; draft 10'10"; speed 20.2 kts; complement 65; armament one 3"/50 dual-purpose mount, one single 40mm mount, three 20mm mounts, two mousetrap depth-charge projectors, four depth-charge projectors and two depth-charge tracks; propulsion two 2,880bhp Hooven-Owen-Rentschler R-99DA diesel engines (Serial No. 6676 and 6677), Westinghouse single reduction gear, two shafts. Photographic record: one image of PC-573 in dry dock at Puerto Rico, c. 1940s (Tommy Trampp collection).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1941-1948
- Population
- Dravo Neville Island construction trades (1941-42); crew (1942-48, complement 65)
- Limitations
- NavSource is a volunteer secondary compilation that generally tracks official register data - all milestone values here are independently corroborated by the official BuShips Ships' Data register (ev-02). Contains no asbestos or material content. NavSource lists no decommissioning or stricken dates for this hull. The per-engine rating is rendered '2,880bhp' on the page while the official register and class data give 2,880 shp combined (2 x 1,440 bhp) - register figures carried.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-01
-
[3]Bureau of Ships, Ships' Data, U.S. Naval Vessels, Vol. II - Mine Vessels (less CM & DM), Patrol Vessels, Landing Ships and Craft, NAVSHIPS 250-011 (15 April 1945; GPO 1946), shipscribe.com scan [other_primary]
- Locator
- NAVSHIPS 250-011, Patrol Vessels - Submarine Chasers (PC) list and characteristics tables (PC-573 line items)
- Finding type
- historical_record
- Finding
- The official wartime BuShips register lists PC-573 among Patrol Vessels - Submarine Chasers (PC) in service as of the register's effective date: builder Dravo Corp., Pittsburgh, Pa.; laid down 14 October 1941; launched 5 March 1942; commissioned 13 June 1942. Characteristics table entries for this hull: engine manufacturer and model 'H.O.R. R-99DA' (Hooven-Owen-Rentschler), shaft horsepower 2,880, Westinghouse reduction gear, trial displacement 348 tons, trial speed 20.2 knots.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- register effective 1945-04-15
- Population
- Crew in commissioned service as of April 1945
- Limitations
- Official register entry confirms builder, dates, engine, and trial figures; contains no material or asbestos content. 348-ton trial displacement and 20.2-knot trial speed are condition-specific figures, not the design displacement (class standard ~284-295 t; full/extreme ~450-463 t across sources). Scanned PDF is image-OCR; values cross-checked against NavSource.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-02
-
[4]Memo, Office of the Commandant, U.S. Naval Operating Base, Guantanamo Bay, Cuba, file NBGU/A16-3, serial no. OCR-read as 9046, SECRET, 17 November 1942 - 'Loss of USS ERIE - 12 November 1942' to Commander Caribbean Sea Frontier, containing reports obtained from the commanding officers of the escort vessels with TAG-20, including 'REPORT OF PC-573' (scanned U.S. Navy document hosted at usserie.org) [other_primary]
- Locator
- usserie.org Loss of USS Erie memo PDF, pp. 1-7; 'REPORT OF PC-573' on p. 4; cover file NBGU/A16-3, serial no. OCR-read as 9046
- Finding type
- vessel_history
- Finding
- Ship-specific primary record: PC-573 was an escort of convoy TAG-20 (Trinidad to Guantanamo) when USS Erie (PG-50), the lead escort, was torpedoed by U-163 off Curacao on 12 November 1942. PC-573's own report (verbatim): 'This vessel proceeded towards Sector 1 to relieve SPRY which stood over to assist ERIE. Between 1710 and 1725 observed ships on starboard bow of convoy firing deck guns to starboard. At 1725 sighted five men in the water, position marked by a flag. Searched area and Sector 3, no contact. The Dutch cruiser lowered a boat to pick up the survivors at 1755. Observed ships in the convoy to fire their deck guns on port bow of the convoy, but could not see their target. At 2010 this vessel fired four [rounds] of star shell, nothing was sighted. Resumed patrol in Sector 5.' Companion reports in the same memo are from PC-624, PC-545, USS Spry, USS Biddle, and the escort commander; HNLMS Van Kinsbergen and Queen Wilhemina (ex-PC-468) also operated with the escort.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-11-12 (action); 1942-11-17 (memo)
- Population
- TAG-20 escort crews incl. PC-573 (complement ~65); Erie survivors
- Limitations
- Seven-page image scan of an official Navy memo hosted on a private memorial site (usserie.org); no text layer - content extracted by local OCR and verified against the visible scan. Documents convoy-escort operations only; no asbestos or material content. 'The Dutch cruiser' refers to HNLMS Van Kinsbergen, a sloop, per the memo's own escort composition and DANFS (ev-04).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-03
-
[5]DANFS, Erie II (PG-50) - TAG-20 convoy narrative (verbatim HyperWar transcription of the official DANFS entry) [nhhc_danfs]
- Locator
- DANFS Erie II (PG-50), final paragraph of service narrative
- Finding type
- vessel_history
- Finding
- Official DANFS narrative for USS Erie corroborates the event PC-573's report describes: Erie 'got underway from Port-of-Spain 10 November for Guantanamo Bay, and when 2 days out of Curacao, was torpedoed' (i.e., 12 November 1942); fires and magazine explosions followed; seven killed and 11 wounded; 'Survivors were taken from the water by a Netherlands ship, HMNS Van Kinsbergen.' Erie was towed into Willemstad and capsized/sank there 5 December 1942 during salvage preparations.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1942-11-10 to 1942-12-05
- Population
- TAG-20 convoy and escort crews; Erie crew (7 killed, 11 wounded)
- Limitations
- Names the convoy action and the rescue ship but does NOT name PC-573 - context corroboration only for the event documented in this hull's own report (ev-03). Live NHHC DANFS pages for patrol craft are inconsistent; verbatim HyperWar/ibiblio transcription cited. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-04
-
[6]The Log Book Project, 'With TAG63 to Guantanamo' (Sept. 2023) - convoy reconstruction from the HNLMS Van Kinsbergen deck log; corroborated by uboat.net command chronology and shipbuildinghistory production table [other_primary]
- Locator
- thelogbookproject.com/tag63-to-guantanamo (escort composition, 29 May 1943 departure); uboat.net ship/8550 command list; navalmarinearchive.com/sbh/smallships/pc2.html PC-573 row
- Finding type
- vessel_history
- Finding
- Secondary reconstruction grounded in the HNLMS Van Kinsbergen deck log places PC-573 as one of four escorts of convoy TAG-63 (Trinidad-Aruba-Guantanamo), which sailed from Port of Spain 29 May 1943 - escorts HNLMS Van Kinsbergen (escort commander), HNLMS Queen Wilhemina (ex-PC-468), USS Biddle (DD-151), and USS PC-573 - and notes the same four ships had escorted together through the Caribbean convoy battles including the November 1942 Erie action. The TAG series ran Trinidad-Aruba-Guantanamo August 1942-May 1945. uboat.net's command chronology for this hull lists Gordon Marvin Street, USNR, in command from commissioning (13 Jun 1942) to mid-1943, succeeded by six further USNR officers through late 1945. shipbuildinghistory's production table lists PC-573, Dravo Corp., Pittsburgh, delivered/commissioned 13 June 1942, sold 1948.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943 (escort service); 2023 (account)
- Population
- PC-573 crew on Caribbean convoy escort, 1942-43
- Limitations
- The Log Book Project is a researched secondary compilation, not an official record - its load-bearing source is the Van Kinsbergen deck log (Dutch naval archive), which is the archival lead here; PC-573's own deck logs are the unaccessed U.S. counterpart (ev-09). CO chronology is uboat.net secondary data, unverified against primary records. The same article's '10 November 1942' dating of the Erie loss is incorrect - the memo and DANFS fix it at 12 November 1942; the error is not carried.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-05
-
[7]Era inference built on: NavSource + NAVSHIPS 250-011 specifications (twin Hooven-Owen-Rentschler R-99DA diesels, Westinghouse reduction gear, two shafts - no steam plant); PC-461 class design (173-ft steel hull, ASW/escort role); GAO HRD-80-2 era documentation; In re Dravo LLC builder-litigation record (ev-07) [other_primary]
- Locator
- NavSource/NAVSHIPS specifications (diesel plant); GAO HRD-80-2 era framing
- Finding type
- asbestos_application
- Finding
- A steel-hulled patrol craft built 1941-42 sits inside the Navy's documented asbestos-use era; era-standard applications aboard a small diesel combatant of this type and period were machinery and diesel-exhaust insulation/lagging, gaskets, valve and flange packing, electrical insulation, and deck coverings/cement, plus shipyard-applied finishes. As a diesel-propelled vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply; the plausible exposure pathways are the engine-room/exhaust systems, machinery gaskets and packing, and construction/repair disturbance of installed materials.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1941-1948+
- Population
- Dravo construction trades (1941-42); engineering-room crew (1942-48); any later repair/scrapping trades
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for PC-573. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-06
-
[8]In re Dravo LLC - Derivative Claims Against Carmeuse Lime, Inc., Nos. J-79A-2025 and J-79B-2025 (Pa. Supreme Court, decided May 22, 2026, Brobson, J.), reversing In re Dravo LLC, 307 A.3d 146 (Pa. Super. 2023) [court_record]
- Locator
- Pa. Supreme Court opinion J-79A-2025/J-79B-2025, Factual Background (pp. 2-7: Asbestos Claims recital, 1940s-1980s window, claim bar date, $7M Excess Policies settlement); holding at pp. 8-9
- Finding type
- litigation_documented
- Finding
- Published appellate record documents asbestos litigation history for this hull's builder: per stipulated facts recited by the Pennsylvania Supreme Court, Dravo Corporation (publicly owned, Pittsburgh-based, heavy industry incl. watercraft manufacture, existing since the late 1880s) faced lawsuits 'beginning in at least the early 1990s' alleging asbestos-related injuries, claims 'typically ... based on allegations of exposure to asbestos during Dravo's operations from the 1940s through the 1980s' - a window covering PC-573's 1941-42 construction at Dravo's Neville Island yard. Hundreds of asbestos claimants asserted claims against Dravo by the July 13, 2020 claim bar date in the dissolution proceeding, and Dravo resolved all timely filed claims (insurance settlement approved July 17, 2020). In the separate veil-piercing consolidation, the Superior Court (307 A.3d 146, 2023) had allowed asbestos plaintiffs to pierce the veil to reach parent Carmeuse Lime (CLI); the Supreme Court reversed, holding veil piercing is not available under the LLC Act for these time-barred claims.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1940s-1980s (alleged exposure window); 2018-2026 (dissolution and appellate litigation)
- Population
- Asbestos claimants alleging exposure during Dravo operations 1940s-1980s (hundreds of claimants); Dravo Neville Island workforce incl. 1941-42 PC construction trades
- Limitations
- Litigation-stage discipline: the veil-piercing opinions do not adjudicate exposure - they decide a corporate-recovery question on stipulated facts. The recital that Dravo faced asbestos claims alleging exposure 'during Dravo's operations from the 1940s through the 1980s' is itself a stipulated description of pleadings, not a finding that asbestos exposure occurred at the Neville Island yard specifically (Dravo's operations also included steel mills, chemical plants, and construction/engineering sites). Builder-level, not hull-level: does not establish asbestos aboard this hull, individual exposure, quantity, or legal eligibility. Underlying individual suits against Dravo were resolved under the claim-bar process; outcome detail not public.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-07
-
[9]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 (1941-42) and service era (1942-48).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- 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 2026-10-03) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-08
-
[10]NARA series leads: RG 24 Muster Rolls of U.S. Navy Ships, Stations, and Other Naval Activities (1939-1949); Logbooks of U.S. Navy Ships and Stations (deck logs); RG 38 World War II War Diaries, Other Operational Records and Histories - the series under which a PC-573 file unit would sit (pattern verified on sibling hulls e.g. PC-1564 NAID 192137009; PCE-877 war diary NAID 134372581) [other_primary]
- Locator
- NARA catalog (catalog.archives.gov), RG 24 muster rolls / deck logs and RG 38 war diaries series; PCSA collection index PDF (bchsmuseum.org)
- Finding type
- historical_record
- Finding
- U.S. Navy enlisted muster rolls, deck logs, and any war diary for PC-573 are expected in NARA's digitized series - the repository holding the hull-level records (crew names by quarter, movements, availabilities) that would let a researcher reconstruct the crew population and any yard periods. The Patrol Craft Sailors Association collection (Betty Carrouth Historical Society Museum, Gainesville TX) also lists a PC-573 file. Not accessed: the NARA catalog interface is JS-rendered and a specific PC-573 file unit/NAID could not be verified online this session.
- Verification
- unverified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1949 (record coverage)
- Population
- PC-573 crew by quarter (muster rolls); prospective researchers
- Limitations
- Archival lead only - series existence verified via sibling-hull file units, but no PC-573-specific NAID was confirmed. Muster rolls and deck logs are personnel/movement records, not material surveys; no asbestos content expected or claimed.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-09
-
[11]Batch-7948 search ledger (this record): NavSource; NAVSHIPS 250-011 Ships' Data register; usserie.org primary-document scans; DANFS (Erie); NARA series check; PCSA collection index; Pennsylvania appellate record (In re Dravo); GAO product page; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-573-pc573-01 through -09
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located for PC-573: no asbestos survey, abatement contract, hazmat disclosure, museum/environmental filing, or case naming this hull was found in the public sources searched (see search_ledger). CAVEAT: CourtListener opinion and docket searches could not be completed this session - the shared fleet pacing budget (58 req/hr across sessions) was exhausted on each attempt; logged as blocked in search_ledger, not as a negative result.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - the era inference stands on its own. The litigation repository search is a genuine open gap (blocked, not run to completion). NARA deck logs/muster rolls and any Maritime Commission disposal file for the 1948 sale are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-573-pc573-10