Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 1066-packet.md [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-yms-413-yms413-pkt-1066-packet-md
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[2]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-413 page - construction, commissioning, strike, transfer timeline; specifications; photograph (David Richter) [other_primary]
- Locator
- NavSource 11/19413.htm header block and specifications block; https://uboat.net/allies/warships/ship/9832.html (ordered date)
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 14 January 1944 by Bellingham Marine Railway and Boat Building Co., Bellingham, WA; launched 4 July 1944; completed 26 October 1944; commissioned USS YMS-413; struck from the Navy Register 28 January 1947; transferred to South Korea 6 April 1947 and named Kwang Chu (YMS 503); fate unknown. Call sign Nan-Peter-Peter-Charlie. Specifications: displacement 270 t.; length 136'; beam 24'6"; draft 8'; speed 13 kts.; complement 50; armament one 3"/50 dual-purpose mount and two 20mm mounts; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single reduction gear, two shafts. Page states explicitly: 'There is no DANFS History currently available for YMS-413.' uboat.net (corroborating secondary compilation) adds: ordered 21 July 1943.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-1947 (USN); 1947 onward (ROKN)
- Population
- Bellingham yard trades (1944); U.S. Navy crew (1944-47); ROK Navy crew (1947-onward)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates track NVR/DANFS conventions but are not independently sourced on the page. No asbestos or material content. Complement figure (50) conflicts with class design complement (32) and the DNA report's actual crew figure (32) - see gaps. 'Fate unknown' leaves ROKN service end and disposal unverified.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-01
-
[3]National Archives Special List 44: List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 (Bradley, Kurtz, et al., 1978), print page 522, YMS-413 entry (verified from the Allen County Public Library Genealogy Center page-by-page scan, display page 554) [other_primary]
- Locator
- Special List 44 print p. 522, 'YMS-413' line entry; ACPL scan image narasl44/554.jpg
- Finding type
- historical_record
- Finding
- NARA Special List 44 inventories one logbook for YMS-413 covering 26 October 1944 - 31 March 1945 ('YMS-413 .......... Oct. 26, 1944-Mar. 31, 1945 .......... 1' under the 'Inclusive Dates / No. of Logbooks' column layout). This is deck-log coverage only - the commissioning-date match (26 Oct 1944) indicates the surviving logbook begins at commissioning. NARA's online deck-log index does not list YMS-413 among digitized logs.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1944-10-26 to 1945-03-31 (logged coverage)
- Limitations
- Deck-log holdings inventory only - describes the existence of one logbook, not its contents. The 1944-45 coverage ends a year-plus before her Operation Crossroads assignment; post-March-1945 deck logs (including the Crossroads window) are not in the SL44 inventory and their location/custody is unverified. Log pages themselves are not digitized for public access. Batch prompt described this as 'PDF page 121'; the verified location in the publication is print page 522 (ACPL scan display 554) - the PDF pagination refers to a different wrapper.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-02
-
[4]Bombs at Bikini: The Official Report of Operation Crossroads (William A. Shurcliff / Joint Task Force One, Wm. H. Wise & Co., 1947), Appendix 8 'Support Vessels, Test A', print page 189, Survey Unit (Task Unit 1.8.5) listing (verified against the scanned print original at Internet Archive) [other_primary]
- Locator
- Bombs at Bikini (1947), Appendix 8, p. 189, section (k) Survey Unit; archive.org identifier bombsatbikiniof00unit, leaf n236
- Finding type
- vessel_history
- Finding
- The official 1947 JTF-1 report lists YMS-413 among the ten craft of the Survey Unit (Task Unit 1.8.5, commanded by Captain C. B. Schiano (Navy)): BOWDITCH (AGS-4), JOHN BLISH (AGS-10), JAMES M. GILLISS (AGS-13), YP-636, YMS-354, YMS-358, YMS-413, YMS-463, LST-871, LST-989. Commanding officer listed for YMS-413: 'Ens. V. P. Finos.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946
- Population
- YMS-413 crew (~32 per DNA-TR-82-05-V3), Ens. V. P. Finos commanding; Survey Unit crews
- Limitations
- Establishes assignment and commanding officer at Operation Crossroads (July-September 1946), not the ship's movements or any material condition. Unit rosters reflect the operation's organizational snapshot. No asbestos content. The widely-mirrored atomicarchive.com transcription of this appendix renders the CO rank as 'Bos.' - the print original reads 'Ens.' (see ev-09).
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-03
-
[5]Defense Nuclear Agency technical report DNA-TR-82-05, 'Analysis of Radiation Exposure for Naval Units of Operation CROSSROADS,' Volume III (Appendix B): Support Ships (Science Applications Inc., 3 March 1982), USS YMS-413 section, report p. 435 (hosted by Defense Threat Reduction Agency, Nuclear Test Personnel Review collection) [other_primary]
- Locator
- DNA-TR-82-05-V3, Support Ship Information Summary + Path Report + dose table for USS YMS-413, report p. 435 (PDF pp. ~413-414 in some scan paginations)
- Finding type
- gov_survey
- Finding
- Ship-specific government dose reconstruction: SHIP: USS YMS-413; CREW SIZE: 32; GROUP: SURVEY. Mission narrative: 'YMS-413 arrived at Bikini prior to the first detonation on July 1, 1946. As part of the Survey Unit, its mission included surveying the probable effects of the nuclear tests on fish and other wildlife and conducting an oceanographic survey to determine the character of the ocean currents in and around Bikini Atoll.' Path report places the ship at Rongelap Atoll at both detonations (ABLE 1 Jul, BAKER 25 Jul - both 23 KT), entering Bikini lagoon 4 July; log-reconstructed movements include moored alongside YMS-358, YMS-354 alongside, moored to USS Cebu, fishing operations (2-3 August), moored to YMS-350, and departure from Bikini lagoon 14 September 1946 en route Kwajalein; an inspection party from USS Haven declared the ship 'RADIOLOGICALLY SAFE' at Kwajalein (~day 78, mid-September 1946). 'Total calculated dose received while at Bikini: 0.444 REM'; ship contamination factor on departure: 3.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946 (event); 1982 (reconstruction)
- Population
- YMS-413 crew (32) at Bikini/Kwajalein, 1 July - 14 September 1946; USS Haven radiological inspection party
- Limitations
- Radiological exposure reconstruction, not an asbestos record - contains no material or insulation content. Doses are 1982-model reconstructions (film-badge-equivalent estimates from modeled lagoon water, target-ship, and contamination sources), not measured individual doses; several path-report positions are flagged 'ESTIMATED' because contemporaneous deck-log detail was thin for this craft. 'Declared radiologically safe' (September 1946) addresses residual radioactivity only and says nothing about asbestos. Crew size 32 corroborates the class design complement over NavSource's 50.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-04
-
[6]Era inference built on: NavSource YMS-413 specifications (2 x GM 8-268A diesels, two shafts); NavSource YMS class index ('The wood-hulled YMS...', 561 built at 35 yacht yards, single-stack variant YMS-135 through -445); GAO HRD-80-2 program-level documentation of Navy shipboard asbestos insulation use through the early 1970s (see ev-06) [other_primary]
- Locator
- NavSource 11/19413.htm specifications block; NavSource 11/19idx.htm class narrative; shipbuildinghistory YM index corroboration (561 wooden-hulled boats at 35 yards)
- Finding type
- asbestos_application
- Finding
- A wooden-hulled diesel-powered auxiliary motor minesweeper built at a small yacht/boat yard in 1944 sits inside the Navy's documented asbestos-use era, but the exposure pathway is materially narrower than for steam vessels: no boilers, no steam lines, no turbines - hence no boiler-room lagging pathway (law-firm content describing 'boiler rooms' on WWII minesweepers does not describe this class). Era-standard residual applications aboard a 1944 motor craft of this type were diesel exhaust lagging, engine and machinery gaskets, valve packing, electrical insulation, and winch/windlass brake linings - era inference only.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1944-1947 (USN era)
- Population
- Bellingham yard construction trades (1944); U.S. Navy crew (1944-47); Crossroads crew (1946); ROK Navy crew (1947-onward)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, build specification, or work package located for YMS-413. Names era-standard applications, not confirmed installed materials. No quantity. The wooden hull and diesel plant reduce (not eliminate) the expected asbestos footprint relative to steam vessels; no primary source was located confirming or excluding specific products aboard this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-05
-
[7]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 to automated fetch)
- 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 U.S. service era (1944-47).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- 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, per standing batch experience) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-06
-
[8]Republic of Korea Navy service compilations: NavSource transfer/strike line ('Transferred to South Korea 6 April 1947 and named Kwang Chu (YMS 503); Fate unknown'); Shipbuilding History Bellingham yard table ('to South Korea 1948 as Kwang Chu, struck 1972'); oceania.pbworks register ('KWANG CHU (503) ex YMS 413, deleted 1972'); Wikipedia ROKN ship lists (YMS-503 Gwangju as first-of-name lineage); Korean-language military forum roster (AMS-503 Gwangju, ex YMS-413, retired) [other_primary]
- Locator
- NavSource 11/19413.htm; shipbuildinghistory.njscuba.net/us-comm-small/bellingham/; oceania.pbworks.com 'SK Kang Wha-1943' register; en.wikipedia.org List of ships of the Republic of Korea Navy
- Finding type
- vessel_history
- Finding
- Post-USN service: the hull served the Republic of Korea Navy as Kwang Chu (광주, Gwangju), pennant YMS-503 (later AMS-503 in Korean compilations). Two independent secondary compilations give disposal as 'struck 1972' / 'deleted 1972'; NavSource lists fate unknown. The ROK Navy treats YMS-503 Gwangju as first-of-lineage for the name (later Gwangjus: DD-921 and FFG-817). Korean-source material indicates the ROKN YMS/AMS sweepers performed combat minesweeping and transport during the Korean War era, though no hull-specific 1950-53 operation record for AMS-503 was located.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1947-1972
- Population
- ROKN crew of Gwangju/Kwang Chu (1947-~1972)
- Limitations
- Transfer date (6 Apr 1947) verified via NavSource; the '1948' year in the Shipbuilding History table conflicts and is unresolved - NavSource carried. ROKN service details and the ~1972 disposal rest entirely on secondary compilations; no ROK Navy primary source, U.S. transfer document, or Foreign Military Sales record was located. 'Struck 1972' is carried as a reported figure, not verified.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-07
-
[9]Batch-9052 search ledger (this record): NavSource ship and class pages; NARA Special List 44 (ACPL scan); NARA online deck-log index; NHHC DANFS (per NavSource, none exists); NVR; DTRA NTPR report library; official 1947 Crossroads report; CourtListener (see sl-08 for status); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-413-01 through -11
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or litigation naming USS YMS-413 was found in the public sources searched (see search_ledger). CourtListener returned zero results on all four base queries ('YMS-413' opinion and docket; 'USS YMS-413' opinion and docket) - no docketed case or opinion naming this hull exists in that index; with zero base results, asbestos-variant queries were not run (variant sets are subsets). No DANFS history exists for this hull (NavSource states none). The only 'asbestos aboard minesweepers' material surfaced is law-firm marketing content (mesothelioma.com and similar listicles) asserting boiler-room and living-quarter asbestos on 'WWII minesweepers' generically - without primary sourcing and physically inapplicable to this diesel-powered class (no boilers); excluded by source policy.
- 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 - era-consistent materials may have been fitted. Undigitized leads remain: the Oct 1944-Mar 1945 deck logbook (NARA, RG 24), builder's records for Bellingham Marine Railway (yard defunct; corporate archive unlocated), the 1947 transfer documentation, and any ROKN disposal record. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-08
-
[10]atomicarchive.com transcription of Bombs at Bikini Appendix 8 vs the 1947 print original (archive.org bombsatbikiniof00unit, p. 189) [other_primary]
- Locator
- Bombs at Bikini (1947), Appendix 8, p. 189 (leaf n236) vs atomicarchive.com appendix-8.html
- Finding type
- historical_record
- Finding
- CORRECTION: the widely-cited atomicarchive.com transcription of the Crossroads Appendix 8 support-vessel roster renders YMS-413's commanding officer as 'Bos. V. P. Finos' (and garbles adjacent ranks: 'Bus. E. J. Litty', 'Eus. C. M. Clancy'). The print original reads 'Ens. V. P. Finos' - consistent with the Ensign/Lieutenant ranks of the neighboring YMS/YP commanding officers.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1946 (roster); transcription error undated
- Limitations
- Corrects a circulating transcription error in a tertiary rendering of a primary document; not a material or exposure claim. Researchers citing the atomicarchive transcription should verify against the 1947 print edition.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-413-09