Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
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[1]research packet 934-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: PHANTOM
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Evidence ID
- uss-pc-755-pc755-pkt-934-packet-md
-
[2]NavSource Online: Submarine Chaser Photo Archive, SC-755 (ex-PC-755) - full timeline, specifications, commanding officer, post-Navy ownership chain [other_primary]
- Locator
- NavSource 12/150755.htm header block, 'SC-497 Class Submarine Chaser' timeline, specifications block, commanding-officers table
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull (SC-497 class submarine chaser): laid down 20 June 1942 as PC-755 by the Robinson Marine Construction Co., Benton Harbor, MI; launched 3 April 1943 and reclassified SC-755; commissioned 11 June 1943; decommissioned 2 December 1945; struck from the Naval Register 3 January 1946; transferred to the Maritime Commission 20 January 1948; acquired 1948 by John Richard Curtis of Los Angeles, CA for use as a fishing boat named Yaqui Queen; subsequent owners George Patrick Meyers (Los Angeles, 1950), Peter George Sliskivich (San Pedro, 1954), Gladys H. Sliskivich (Long Beach, 1956), Willis E. Johnson (La Mesa, 1961), B. A. Palmer (Chula Vista, 1975, renamed Novia Del Mar); operated under the Panamanian flag in 1978; fate unknown. Specifications: displacement 148 t; length 110'10"; beam 17'; draft 6'6"; speed 21 kts; complement 28; armament one 40mm gun mount, two .50 cal. machine guns, two depth-charge projector 'Y Guns,' two depth-charge tracks; propulsion two 1,540 bhp General Motors (Electro-Motive Div.) 16-184A diesel engines, two shafts. Commanding officer LTJG Harry L. Quinn, USNR (11 June 1943). Call sign Nan-Xray-Oboe-Uncle. No image of the vessel is in the archive. Page notes: 'There is no DANFS history available for SC-755.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1978
- Population
- Robinson Marine construction trades (1942-43); wartime crew ~28 (1943-45); post-1948 civilian fishing crews
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates generally track NVR-era data, but its commissioned date (11 June 1943) conflicts with the builder's yard record, uboat.net, and NavalCoverMuseum (16 May 1943; see gaps). Contains no asbestos content. The ownership chain and merchant names are uncorroborated by USCG documentation in this record (merchant official number 256355 is corroborated by the yard record, ev-02).
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-01
-
[3]Naval Marine Archive, Robinson Marine Construction (Benton Harbor, MI) build list - yard record for SC 755; corroborated by uboat.net Allied Warships ship page 8972 and NavalCoverMuseum SC 755 designation history [other_primary]
- Locator
- navalmarinearchive Robinson build table (row 'SC 755', O.N. 256355); uboat.net/allies/warships/ship/8972.html; navalcovermuseum.org/wiki/SC_755 and /wiki/USS_SC-755_Covers_Page_1
- Finding type
- vessel_history
- Finding
- Robinson Marine yard record (compiled from merchant-vessel documentation): 'SC 755', US Navy sub chaser, official number 256355, 136 GT, 110 ft, delivered/commissioned 16-May-43, 'Sold 1948 as Yaqui Queen.' uboat.net corroborates: ordered 16 Feb 1942, laid down 20 Jun 1942, launched 3 Apr 1943, commissioned 16 May 1943, builder Robinson Marine Construction Co., Benton Harbor. NavalCoverMuseum designation history matches NavSource (laid down as PC-755 20 Jun 1942, launched/redesignated 3 Apr 1943, commissioned 16 May 1943, struck 3 Jan 1946, to Maritime Commission 20 Jan 1948) and holds a 1943-09-25 cover postmarked Locy Type 2z - the ship carried no post office; the cover was posted from another ship or station, confirming the hull in commission by September 1943.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1948
- Population
- Robinson Marine construction trades (1942-43); wartime crew (1943-45)
- Limitations
- Secondary compilations agreeing on the 16 May 1943 date (against NavSource's 11 June 1943); the yard record's 'Delivery' column is the documentational proxy for commissioning. uboat.net lists no wartime events for this hull. The NavalCoverMuseum cover is physical-use evidence of the vessel, not a service narrative. No asbestos content in any of these sources.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-02
-
[4]NARA Special List 44, 'List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947' (NARA, 1978), ACPL Genealogy Center web edition, book page 494 - SC-755 entry [other_primary]
- Locator
- Special List 44 book page 494 (display page 525 in the ACPL web edition); row 'SC-755 | June 18, 1943-Dec. 12, 1945 | 7'
- Finding type
- historical_record
- Finding
- NARA's published logbook inventory lists SC-755 with logbook coverage June 18, 1943 - December 12, 1945, in 7 logbooks (Special List 44, 'Ships with Symbol and Number Designations,' SC block, book page 494; verified against the digitized page image). These are the ship's deck logs, held at NARA College Park (RG 24, Entry 118). Coverage begins after commissioning and ends ten days after decommissioning - consistent with a complete wartime log run.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1943-1945
- Population
- Crew of SC-755 (1943-45) - deck logs are the primary source for wartime assignment and locations
- Limitations
- Holdings inventory only - establishes that 7 logbooks exist and their date span, not their contents. The logs are NOT digitized in the National Archives Catalog (search within NAID 594258 'Logbooks of U.S. Navy Ships and Stations' returns no SC-755 file units); they are physical records at NARA College Park. Log coverage dates are not commissioning/decommissioning dates. Wartime assignment, ports, and any yard availabilities must be read from the logs themselves - not reviewed.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-03
-
[5]Theodore R. Treadwell, 'Splinter Fleet - The Wooden Subchasers of WWII' (splinterfleet.org), class-level documentation of the 110-foot wooden SC type; NavSource specifications block for this hull (diesel propulsion) [other_primary]
- Locator
- splinterfleet.org class overview (438 boats, wooden hull, ~50 yards, complement 3 officers + 24 enlisted); NavSource 12/150755.htm specifications block
- Finding type
- asbestos_application
- Finding
- SC-755 was one of 438 SC-497-class submarine chasers - the wooden-hulled 'splinter fleet,' the smallest commissioned warship type of WWII, built 1941-44 by roughly 50 small boat/yacht yards (Robinson Marine, Benton Harbor, was one). Propulsion was twin diesel (this hull: 2 x GM 16-184A, 1,540 bhp each), with no steam plant. Era-standard asbestos applications plausible aboard a small wooden diesel craft of 1943: engine exhaust and muffler lagging, machinery gaskets, valve packing, and electrical insulation in the machinery spaces. The wooden hull removes the hull-insulation pathway, and the absence of boilers/steam piping removes the lagging pathway that dominates steam-vessel asbestos exposure; the confined machinery space and 28-man complement bound the plausible exposure population to engineering ratings and ship's force maintenance.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-03
- Study period
- 1942-1945
- Population
- Robinson Marine construction trades (1942-43); engineering ratings aboard (1943-45); any later re-engining/repair trades are undocumented
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, plan sheet, or work package was located for SC-755. Named applications are era-standard for small diesel warships, not confirmed installed materials; the wooden/diesel configuration means materially less asbestos than a steam-driven steel ship of the era, not zero asbestos. No quantity, no manufacturer attribution, no individual exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-04
-
[6]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 (1942-43) and service era (1943-45).
- 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 - the GAO work centered on Navy shipyard overhauls of larger vessels, not 110-foot wooden craft. 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-755-pc755-05
-
[7]Identity/classification correction grounded in: NavSource SC-755 page ('ex-PC-755'); NavSource SC-497 page ('Commissioned USS PC-497, 15 April 1942; Reclassified SC-497 in April 1943'); NavSource SC index (SC-977 'ex-PC-977' through SC-1072+ blocks) [other_primary]
- Locator
- NavSource 12/150755.htm ('ex-PC-755'), 12/150497.htm (SC-497 designation line), 12/01idx.htm and 12/15idx.htm (SC index)
- Finding type
- historical_record
- Finding
- CORRECTION: 'USS PC-755' and 'USS SC-755' are one hull, not two vessels. The boat was laid down 20 June 1942 carrying the patrol-craft designation PC-755, and was reclassified SC-755 at launch (3 April 1943) as part of the Navy's April 1943 reclassification that returned the 110-foot wooden chasers from the PC to the SC series (the class name-ship itself commissioned as USS PC-497 and became SC-497 in April 1943). The hull is an SC-497-class 110-foot WOODEN submarine chaser - not a PC-461-class 173-foot steel patrol craft. Any source listing 'PC-755' in the PC-461 class is propagating the pre-launch designation.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1942-1943
- Limitations
- Corrects a classification ambiguity, not a material/asbestos claim. The April 1943 class-wide PC-to-SC reclassification is corroborated by the class name-ship's own designation line and the NavSource index ('ex-PC-' annotations across the SC-977+ block); NavSource carries the reclassification at the launch date for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-06
-
[8]Batch-8129 search ledger (this record): NavSource ship page; Robinson Marine yard record; uboat.net; NavalCoverMuseum; NARA Special List 44 (ACPL edition); NARA catalog (NAID 594258); NHHC/DANFS candidate URLs; splinterfleet.org; HyperWar USN 1940-45 listing; GAO product page; secondary web sweep [other_primary]
- Locator
- search_ledger rows sl-uss-pc-755-pc755-01 through -11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, material list, abatement contract, hazmat disclosure, or docketed case naming SC-755/PC-755 was found in the public sources searched. There is no DANFS entry for this hull (NavSource states this; all NHHC candidate URLs return 404), no NVR entry (vessel disposed 1948, pre-1987), and no digitized deck-log file units in the NARA catalog. The vessel's wartime assignment is undocumented in every secondary source consulted - the deck logs (7 volumes, NARA College Park) are the open primary source.
- 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; era materials are plausible (see ev-04). CourtListener status: 3 of 4 base queries completed with only name-collision noise; the 'PC-755' opinion query was pacing-blocked all session (sl-02) - the litigation picture is near-complete but not formally exhaustive. Post-Navy commercial modifications (fishing-boat conversion and later) could have added or removed era materials - undocumented.
- Atlas source
- true
- Evidence ID
- ev-uss-pc-755-pc755-07