Evidence
12 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-12).
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[1]research packet 1061-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-380-yms380-pkt-1061-packet-md
-
[2]National Archives and Records Administration, Special List 44: List of Logbooks of U.S. Navy Ships, Stations, and Miscellaneous Units, 1801-1947 - 'by Ship Numbers' inventory, PDF p. 120 [other_primary]
- Locator
- Special List 44 'by Ship Numbers' PDF, p. 120, entry 'YMS-380 10/12/1943 3/22/1945'; online index at https://www.archives.gov/research/military/logbooks/navy-online
- Finding type
- historical_record
- Finding
- NARA Special List 44 inventories US Navy deck logs for YMS-380 covering 10/12/1943 - 3/22/1945 - the hull's entire US Navy service period, the end date matching her documented transfer to Norway on 22 March 1945.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1945
- Population
- Crew, October 1943 - March 1945
- Limitations
- Inventory coverage dates are log-holdings dates, not commissioning/decommissioning dates. The logs themselves are held in RG 24 at NARA College Park; YMS-380 does not appear in NARA's online deck-log index (archives.gov 'Navy Deck Logs Available in the National Archives Catalog' page checked 2026-10-04), so they are presumed undigitized - an open archival lead. Contains no asbestos information.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-01
-
[3]NavSource Online: Mine Warfare Vessel Photo Archive, YMS-380 page (11/19380) - timeline, specifications, photographic record; states 'There is no DANFS history currently available for YMS-380' [other_primary]
- Locator
- NavSource 11/19380.htm timeline block and specifications block; photo caption 'YMS-305, YMS-406 and YMS-380 in a French port sometime after D-Day'
- Finding type
- vessel_history
- Finding
- NavSource timeline for this hull: laid down 6 April 1943 by Greenport Basin and Construction Co., Greenport, NY; launched 29 May 1943; 'Completed 27 September 1943 and commissioned USS YMS-380'; transferred to Norway 22 March 1945, reclassified NYMS-380 and later named Vorma (M 321); 'Returned to U.S. custody 7 June 1948 (on paper); transferred to the State Department, Foreign Liquidation Commission and sold to Norway the same day'; struck from the Naval Register 12 August 1948; struck from the Norwegian Navy list in 1959; 'Fate unknown.' Spec block: displacement 270 t.; length 136'; beam 22' 9"; draft 6' 3"; speed 14.5 kts.; complement 50; armament one 3"/50 dual-purpose mount, two 20mm mounts, two depth charge projectors, two depth charge tracks; propulsion two 880bhp General Motors 8-268A diesel engines, Snow and Knobstedt single-reduction gear, two shafts. Photo captions document YMS-380 in a French port after D-Day alongside YMS-305 and YMS-406 (crewmember George Meier collection). Call sign Nan-Fox-King-Zebra.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1959
- Population
- Construction trades, Greenport Basin (1943); US Navy crew (1943-45); Royal Norwegian Navy crew (1945-59)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates corroborated here by uboat.net and shipbuilding-history yard lists, and the transfer date by the NARA log-coverage end date. Spec figures conflict with class references (complement 50 vs 29-32; beam 22'9" vs 24'6"; draft 6'3" vs 8'; engine power 880bhp vs ~440shp per unit - see gaps). Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-02
-
[4]uboat.net, Allied Warships of WWII, 'USS YMS-380 (YMS-380) - Minesweeper of the YMS class' warship data sheet [reputable_press]
- Locator
- uboat.net ship/9799 data table ('Ordered', 'Laid down', 'Launched', 'Commissioned', 'End service', 'History' rows)
- Finding type
- vessel_history
- Finding
- Corroborating registry data for this hull: built by Greenport Basin and Construction Co. (Greenport, Long Island, NY); ordered 13 April 1942; laid down 6 April 1943; launched 29 May 1943; commissioned 27 September 1943; end of US service 22 March 1945; 'Transferred to Norway on 22 March 1945 being renamed NYMS-380. Later renamed Vorma (M 321).'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1942-1945
- Population
- US Navy crew (1943-45)
- Limitations
- Secondary warship registry (Gudmundur Helgason's uboat.net compilation) - consistent with NavSource and the yard build list on all overlapping dates; adds the 13 Apr 1942 order date not present elsewhere in the searched sources. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-03
-
[5]Operation Plan No. 2-44, Serial 00144, 3 May 1944 - Annex 'L', Communication Plan (ONCOWEST), Naval Western Task Force (Operation NEPTUNE) - official US Navy operation plan; HyperWar Foundation transcription [other_primary]
- Locator
- Annex L, Table II 'Call Signs (Voice) - Alphabetically by Call Signs': row '9B2 | YMS 380'; alphabetical ship index entry 'YMS 380 | 9B2'
- Finding type
- vessel_history
- Finding
- The communication plan (Table II, Call Signs (Voice)) for the Naval Western Task Force's execution of Operation NEPTUNE allocates YMS 380 the voice call sign 9B2, documenting this hull's assignment to the Normandy invasion force effective 3 May 1944 planning date. Twenty other YMS-class sweepers appear in the same allocation (YMS 231, 247, 251, 305, 346-352, 355, 356, 358, 375, 377, 378, 381, 382, 406).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- May-June 1944
- Population
- Crew aboard during Operation NEPTUNE, June 1944
- Limitations
- Documents task-force assignment, not executed action - a call-sign allocation does not itself prove which sweeps this hull performed on/after D-Day (the Desrosiers account and battle-star credit cover that). HyperWar is a faithful-transcription mirror of the official plan; Sheets 1-3 of the annex were missing from the source document. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-04
-
[6]The Morning Call (Allentown, PA), 'Doing a yeoman's job on D-Day,' 20 August 2000 - interview-based account of Yeoman First Class John B. Desrosiers Jr., helmsman of YMS-380 [reputable_press]
- Locator
- Morning Call 2000-08-20 feature, Desrosiers narrative sections (D-Day sweep; Cherbourg Christmas Eve)
- Finding type
- vessel_history
- Finding
- First-person veteran account for this hull: Desrosiers was at the helm of YMS-380 off Normandy on 6 June 1944. His squadron of 11 YMS-class minesweepers lined up in the Channel at midnight 5 June; six swept the last 20 miles to Omaha Beach, clearing a channel about 300 yards wide, and withdrew under German shore-battery fire without losing a sweep. He describes acoustic, moored, and magnetic sweep methods; the ship as wooden-hulled, 136 ft, with a crew of four officers and about 30 enlisted men under a captain named George Harrelson; and a ship's dog, Lady. At Cherbourg on Christmas Eve 1944, YMS-380 stood out beyond the outer harbor to respond to a torpedoed troop transport carrying US replacement troops. The newspaper reports Desrosiers, Harrelson, and Chief Boatswain Robert Corbin received Bronze Stars for the Normandy work.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- June 1944; December 1944
- Population
- YMS-380 crew, June 1944 - March 1945; embarked troops of the torpedoed transport (Dec 1944)
- Limitations
- Oral history published 55 years after the events - internally consistent with the operation-plan assignment and battle-star credit but uncorroborated in detail by an official source this session. The Christmas Eve troopship is not named in the account; date, location (off Cherbourg), and circumstances are consistent with SS Leopoldville (torpedoed by U-486, 24 Dec 1944) but identification is inference, and the account's figures (~10,000 aboard / ~4,000 dead) materially exceed documented totals (~2,235 troops embarked, ~763 soldiers dead per uboat.net; 'more than 2,000' aboard, 'approximately 800' killed per ABMC) - reported here as recollection, not established fact. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-05
-
[7]US Navy ship WWII campaign/battle-star engagement-credit listing (commercial transcription of the Navy award data), YMS-362 to YMS-481 page [reputable_press]
- Locator
- YMS-380 entry: '6 Jun 44 - 25 Jun 44 | E5 | Invasion of Normandy (including bombardment of Cherbourg)'; '20 Apr 44 | E219 | Convoy UGS-38'
- Finding type
- vessel_history
- Finding
- The engagement-credit list for this hull records two WWII credits: engagement E5, 'Invasion of Normandy (including bombardment of Cherbourg),' 6 June - 25 June 1944; and engagement E219, 'Convoy UGS-38,' 20 April 1944 - the latter consistent with an Atlantic/Mediterranean convoy-screening deployment before the Normandy assignment.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- April 1944; June 1944
- Population
- Crew aboard, April-June 1944
- Limitations
- Commercial vendor transcription of Navy battle-star/engagement data - the primary NAVPERS award list was not located and fetched this session; verification partial. The UGS-38 credit implies presence in that convoy's screen during the 20 April 1944 air attack off Algeria, but participation detail is not documented by the list. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-06
-
[8]NavSource Online: Mine Warfare Vessel Photo Archive, YMS/BYMS class index page - class design and production history [other_primary]
- Locator
- NavSource 11/19idx.htm 'Auxiliary Motor Minesweepers (YMS)' class narrative
- Finding type
- vessel_history
- Finding
- Class documentation for this hull's type: the wood-hulled YMS-1 class was designed by Henry B. Nevins, Inc. (City Island, NY), first keel 4 March 1941; 481 ships of the type built at 35 yacht yards (12 East Coast, 19 West Coast, 4 Great Lakes) for inshore sweeping ahead of amphibious assaults; YMS-135 through -445, -480, -481 (the range including this hull) were the single-stack sub-type. Surviving YMS's were reclassified AMS and given names in 1947 - this hull left US service in 1945 and so never received a US name.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1941-1945
- Population
- Class-wide crew and construction trades
- Limitations
- Class-level context only - does not name this hull and establishes type characteristics, not hull-specific condition. Volunteer secondary compilation. No asbestos content; no materials list for the class located.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-07
-
[9]Era inference built on: NavSource YMS-380 spec block (diesel plant, wood hull); NavSource YMS class index (design/type data); GAO HRD-80-2 (Navy asbestos-era program, see ev-09); era-standard small-combatant material practices [other_primary]
- Locator
- NavSource 11/19380.htm specifications; NavSource 11/19idx.htm class narrative; GAO HRD-80-2 context row ev-uss-yms-380-yms380-09
- Finding type
- asbestos_application
- Finding
- A wooden-hulled, diesel-powered minesweeper built in 1943 at a small yacht yard sits inside the Navy's documented asbestos era; era-standard applications aboard a diesel combatant of this type and period were diesel exhaust lagging, machinery insulation, gaskets, valve packing, and electrical insulation in a confined 136-ft hull. As a wood-hulled vessel she carried less structural thermal insulation than a steel combatant, and with no steam plant the boiler/turbine lagging pathway does not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-04
- Study period
- 1943-1959
- Population
- Greenport Basin construction trades (1943); US Navy crew (1943-45); Royal Norwegian Navy crew (1945-59); unknown disposal workforce after 1959
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, work package, or deck-log extract was located for YMS-380. 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-380-yms380-08
-
[10]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 (1943) and service era (US Navy 1943-45; Norwegian 1945-59).
- 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 has historically blocked automated fetch, HTTP 403) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-09
-
[11]ShipbuildingHistory (Colton) / Naval Marine Archive 'Greenport Basin and Construction Co., Greenport NY' yard build list - YMS-380 row; corroborating Norwegian fleet lists (klueser.de; Conway's-derived NYMS table) [other_primary]
- Locator
- shipbuildinghistory.njscuba.net/us-comm-small/greenport/ YMS-380 row; klueser.de Norway ship list (NYMS 380/Vorma 1945-1959); asp.bibliotekservice.no maritime bibliography, KNM Vorma index entry
- Finding type
- vessel_history
- Finding
- Builder documentation for this hull: Greenport Basin & Construction Co. was founded in the mid-19th century by Pliny C. and Theodore W. Brigham, building fishing vessels and yachts; during WWII it acquired neighboring Greenport Shipyard Company and expanded into steel boatbuilding; it continues today as Greenport Yacht & Shipbuilding Co. The yard list's YMS-380 row gives delivery 11 October 1943 and disposition 'To Norway 1945 as NYMS 380/Vorma (M 321)'. Norwegian-derived fleet lists corroborate NYMS 380 renamed Vorma (M 321), in Norwegian service 1945-1959; the National Library of Norway's maritime bibliography indexes a journal article on KNM Vorma (Thorbjorn Ingebrigtsen, Skipet arg. 24 nr. 3, 1998, p. 37) - a Norwegian-side archival lead.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-04
- Study period
- 1943-1959
- Population
- Greenport Basin construction trades (1943); Royal Norwegian Navy crew (1945-59)
- Limitations
- Secondary compilations - the yard list's 11 Oct 1943 delivery date varies from NavSource's 'completed and commissioned 27 Sep 1943' (see gaps); the delivery-vs-completion distinction may explain it. Norwegian-service detail beyond dates/pennant is thin in accessible sources; the Skipet article was located only as a bibliographic index entry, not full text. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-10
-
[12]Batch-9015 search ledger (this record): NARA Special List 44 p. 120 + online deck-log index; NavSource 11/19380 + class index; uboat.net; HyperWar Operation Plan 2-44 Annex L; The Morning Call; battle-star transcription list; yard build lists; Norwegian fleet lists; CourtListener (see ledger rows); secondary web litigation/asbestos sweep [other_primary]
- Locator
- search_ledger rows sl-uss-yms-380-yms380-01 through -12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, or verified litigation naming USS YMS-380 (NYMS-380/Vorma M 321) was found in the public sources searched. A secondary web sweep surfaced no law-firm or marketing content naming this hull at all - the hull is below the threshold of listicle coverage. CAVEAT: CourtListener could not be queried this session - the fleet pacing budget was continuously spent (helper exit 2 on all attempts); logged as blocked in search_ledger, not as a negative result.
- 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-standard insulation practices on a 1943 diesel combatant make era materials plausible but unproven. The litigation repository search is a genuine open gap (fleet-paced, never reached the API). Deck logs (RG 24, 10/1943-3/1945) are inventoried but undigitized and could contain availability/materiel detail. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-380-yms380-11