Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
-
[1]research packet 1068-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-424-yms424-pkt-1068-packet-md
-
[2]National Archives, Special List 44: List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (NARA, 1978), 'Ships by Signal Number Designation' T-Y section, typeset ship-number PDF [other_primary]
- Locator
- SL44 typeset ship-number PDF p. 121: 'YMS-424 11/24/1944 12/8/1945'
- Finding type
- historical_record
- Finding
- Special List 44 inventories US Navy deck logs for YMS-424 covering 11/24/1944 through 12/8/1945 - a span bracketing the ship's entire Navy career (commissioned/completed 11/24/1944; hulk destroyed 12/18/1945; struck 1/3/1946). The 12/8/1945 log end, ten days before the recorded destruction date, is consistent with the report's strip-and-abandon disposition for unsalvageable hulls (narrative; Appendix III lists this hull 'Grounded - Beyond economical salvage').
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1945 (log coverage); inventory published 1978
- Population
- YMS-424 crew, 1944-1945 (log coverage period)
- Limitations
- This is an inventory entry, not the logs themselves: it establishes that logbooks exist (RG 24-era custody, NARA) but not their contents - stations, operations, personnel, or any aboard conditions are unread here. YMS-424 does not appear on NARA's digitized deck-log index (archives.gov navy-online page searched 2026-10-04 - numbered YMS hulls appear only where they survived to digitized-era coverage), so the logs are an undigitized archival lead only. Entry verified programmatically on p. 121 of the typeset ship-number PDF (pdftotext extraction): 'YMS-424 11/24/1944 12/8/1945'.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-01
-
[3]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-424 page (build/loss chronology compiled from Navy Register data; photo captions; commanding-officer listing) [other_primary]
- Locator
- YMS-424 chronology block, specifications block, commanding-officer table, photo captions
- Finding type
- vessel_history
- Finding
- YMS-1 Class Auxiliary Motor Minesweeper (call sign Nan-Queen-George-William): laid down 1 January 1944 by the Astoria Marine Construction Co., Astoria, OR; launched 12 August 1944; completed 24 November 1944; grounded and damaged by Typhoon Louise at Okinawa 9 October 1945; destroyed 18 December 1945; struck from the Naval Register 3 January 1946. Spec block: displacement 245 t.; length 136'; beam 23' 4"; draft 8' 7"; speed 14 kts.; complement 60; armament one 3"/50 dual purpose mount, two 20mm mounts, two depth charge tracks, two depth charge projectors; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Commanding officer LT A. F. Tuning, USNR (1945). Photo captions document a 6 July 1944 construction progress photo at Astoria Marine and the ship 'Grounded and damaged in typhoon, Okinawa 9 October 1945... Destroyed Dec 1945.' Page states: 'There is no DANFS History currently available for YMS-424.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1946
- Population
- Astoria Marine construction trades (1944); YMS-424 crew (1944-45)
- Limitations
- NavSource is a compiled secondary archive of official data, not the underlying registers; spec-block figures conflict with secondary class references on complement, engine rating, beam, and displacement (see gaps). Contains no asbestos information. WWII operational stations between commissioning and the Okinawa loss are not listed - service detail is undocumented in located sources.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-02
-
[4]NHHC, 'United States Pacific Fleet Organization, 1 May 1945' (official CINCPOA fleet organization roster, Navy Department Library Online Reading Room) [other_primary]
- Locator
- Pacific Fleet Organization 1 May 1945, Mine Squadron TWENTY YMS block: 'YMS 424 | (1) | Lt. A. F. Tuning (USNR)'
- Finding type
- vessel_history
- Finding
- The official 1 May 1945 Pacific Fleet organization roster lists 'YMS 424' under Mine Squadron TWENTY (Capt. R. A. Larkin), within the forces of Commander Minecraft, Pacific Fleet (Rear Admiral A. Sharp), with commanding officer 'Lt. A. F. Tuning (USNR)' - matching the NavSource commanding-officer listing. The hull carries footnote marker (1) and no number in the mine-division column; numbered YMS divisions shown in the column include 11, 14, 94, and 96. This is the only operational-status documentation located for the period between commissioning (24 Nov 1944) and the Okinawa loss (9 Oct 1945).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945-05-01 (roster date)
- Population
- YMS-424 crew under Lt. Tuning; Mine Squadron 20 minecraft population (1 May 1945)
- Limitations
- Establishes fleet assignment and commanding officer on the roster date, not stations or operations - where in the Pacific she was based or sweeping on 1 May 1945 is not stated. The footnote (1) marker's legend is in the document's collapsed footnote block and was not resolved this session; its meaning for this hull (assignment status, reporting status) is not interpreted here. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-03
-
[5]NHHC, 'Typhoons and Hurricanes: Pacific Typhoon at Okinawa, October 1945' - extract on the typhoon from the Commander in Chief, Pacific Fleet and Pacific Ocean Areas report on the Surrender and Occupation of Japan (Annex A narrative; Appendix III damage listing, progress reports to 19 November) [other_primary]
- Locator
- NHHC page, Annex A narrative paragraphs and Appendix III table row 'YMS 424'
- Finding type
- vessel_history
- Finding
- The official CINCPOA report extract documents Typhoon 'Louise' striking Okinawa 9 October 1945 with 80-knot winds and 30-35 ft seas in the constricted Buckner Bay (Nakagusuku Wan): 12 ships and craft sunk, 222 grounded, 32 severely damaged; personnel casualties 36 killed, 47 missing, 100 seriously injured. Appendix III ('Typhoon Damage at Okinawa. Based Upon Progress Reports to 19 November') lists this hull verbatim: 'YMS 424 - Grounded - Beyond economical salvage.' ComServDiv 104 under Commodore T. J. Keliher was assigned salvage work; by 19 November 79 ships had been refloated and 132 were under repair, and on 14 November ComServPac (Vice Admiral W. W. Smith) decided only 10 of some 90 ships with major damage were worth complete salvage - the balance being decommissioned, stripped, and abandoned.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1945 (event); report compiled November 1945
- Population
- YMS-424 crew at loss (9 Oct 1945); ComServDiv 104 salvage crews (Oct-Dec 1945)
- Limitations
- Ship-specific official disposition: 'grounded - beyond economical salvage' - NavSource's 'Grounded and damaged by Typhoon Louise... Destroyed 18 December 1945' is the same event carried forward; the wreck destruction is consistent with the report's strip-and-abandon disposition for unsalvageable hulls. Establishes loss circumstances and the official damage assessment naming this hull, not material content. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-04
-
[6]uboat.net Allied Warships, USS YMS-424 (YMS-424) page - build/loss data table [other_primary]
- Locator
- uboat.net ship/9844 data table and History lines
- Finding type
- vessel_history
- Finding
- Minesweeper of the YMS class: built by Astoria Marine Construction Co. (Astoria, Oregon); ordered 21 July 1943; laid down 1 January 1944; launched 12 August 1944; commissioned 24 November 1944; lost 9 October 1945 - 'Grounded and damaged on 9 October 1945 off Okinawa during a typhoon. Beyond salvage, wreck destroyed on 18 December 1945.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1945
- Population
- YMS-424 crew (1944-45)
- Limitations
- uboat.net is a compiled secondary database, not a primary registry; its data corroborates NavSource and the SL44 log-coverage start on all shared milestones. The 'ordered 21 July 1943' date rests on this source alone - not verified against a contract record (see gaps). 'Commissioned 24 Nov 1944' vs NavSource's 'Completed 24 November 1944' is a wording variant on the same date. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-05
-
[7]NavSource Online, Auxiliary Motor Minesweeper (YMS) index page - class description [other_primary]
- Locator
- YMS index class-description paragraphs
- Finding type
- vessel_history
- Finding
- The YMS type was a wood-hulled, diesel-powered inshore minesweeper designed by Henry B. Nevins, Inc. (YMS-1 laid down 4 March 1941 at City Island, NY); 561 were built at 35 yacht yards - 12 East Coast, 19 West Coast, 4 Great Lakes - with 481 completed. YMS-135 through YMS-445 (plus 480-481) were the single-stack variant, which includes YMS-424. The index records the 9 October 1945 typhoon loss context: 'One of their greatest losses being on 9 October 1945, when seven U.S. YMS' were sunk in a typhoon off Okinawa.' Surviving YMSs still in naval service were reclassified AMS and named in 1947 - YMS-424, destroyed December 1945, was not among them and received no AMS designation or name.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1941-1969
- Population
- YMS-class crews and builders, 1941-1969 (class context)
- Limitations
- Class-level design and loss context only: establishes wood hull and diesel propulsion (no boilers, no steam piping - the dominant asbestos-lagging pathway of steam ships is absent by design), but documents no asbestos or insulation material content for the class or this hull. The 'seven sunk' class figure counts sunk hulls; NHHC Appendix III shows additional YMS (including this one) grounded and written off without sinking. Does not establish presence or absence of residual asbestos components (gaskets, wiring, brake linings).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-06
-
[8]Era inference built on: NavSource YMS index class description (wood hull, diesel plant); GAO HRD-80-2 program documentation (ev-08); NavSource/uboat.net build records (Astoria Marine Construction Co., 1944) [other_primary]
- Locator
- NavSource YMS index class description; GAO HRD-80-2; NavSource 11/19424.htm; uboat.net ship/9844
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel yard minesweeper built 1944 sits inside the Navy's documented asbestos-use era; era-standard applications aboard a small diesel craft of this type were diesel-exhaust lagging, machinery gaskets, valve packing, electrical insulation, and winch/windlass brake linings in confined below-deck spaces. As a diesel vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply, and the wooden hull means no hull-insulation pathway of steel combatants; residual exposure pathways are machinery-space and maintenance-disturbance.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1944-1945
- Population
- Astoria Marine construction trades (1944); crew (1944-45); salvage/strip crews at Okinawa (Oct-Dec 1945)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, construction specification, or work package located for YMS-424. 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-yms-424-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2
- 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 service era (1944-45).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1979
- Population
- Navy shipyard workers and ships' crews; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull. Full text not retrieved this session (gao.gov product page cited; the report's ship-level scope is program-wide).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-08
-
[10]Batch-9064 search ledger (this record): NARA Special List 44 + digitized-log index; NavSource (hull page + class index); NHHC CINCPOA typhoon report page; NHHC Pacific Fleet organization roster; NHHC/DANFS; Naval Vessel Register; uboat.net; shipbuildinghistory yard coverage; Wikipedia; CourtListener opinion and docket search [other_primary]
- Locator
- search_ledger rows sl-uss-yms-424-01 through sl-uss-yms-424-15
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or environmental assessment naming USS YMS-424 was found in the public sources searched; no DANFS entry exists (NavSource states none; NHHC DANFS URLs return 404); no NVR detail page exists (vessel stricken 1946, outside NVR coverage; SHIPDETAILS URL bounces to the NVR root); the deck logs themselves are undigitized. CourtListener: three of four base queries completed with zero hits - 'USS YMS-424' opinion, 'USS YMS-424' docket, 'YMS-424' opinion (all count 0, 2026-10-04); the 'YMS-424' docket query stayed fleet-paced across ~60 min of spaced retries and is an open gap, not a negative result (sl-15).
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 2026-10-04
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - WWII-era diesel auxiliaries still carried asbestos in some components (gaskets, electrical insulation, brake linings); it establishes only that nothing ship-specific is published. The wreck was destroyed in place at Okinawa in 1945 and never received a material or environmental survey in located records.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-424-09