Evidence
9 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-9).
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[1]research packet 1076-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-73-yms73-pkt-1076-packet-md
-
[2]NavSource Naval History, Mine Warfare Vessel Photo Archive, YMS-73 page (transcription of official register data) [other_primary]
- Locator
- NavSource archives/11/19073.htm, vessel data block; statement 'There is no DANFS history available for YMS-73'
- Finding type
- vessel_history
- Finding
- YMS-73, a YMS-1-class auxiliary motor minesweeper, was laid down 22 July 1941 by Weaver Brothers Shipyards, Orange, TX; launched 23 April 1942; completed 22 January 1943; struck from the Naval Register 10 June 1947; transferred to the U.S. State Department Foreign Liquidation Commission in October 1947; fate unknown. Specifications listed: 270 t displacement, 136 ft length, 24 ft 6 in beam, 8 ft draft, 15 kt speed, complement 32; armament one 3"/50 dual-purpose mount, two 20 mm mounts, two depth-charge projectors; propulsion two General Motors 8-268A diesel engines on two shafts. NavSource states no DANFS history exists for this vessel and no photograph is archived.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1947
- Population
- Crew of ~32 (class standard) during 1943-1947 service
- Limitations
- Establishes identity, construction milestones, disposition, and class specifications. Contains no asbestos or materials information; 'fate unknown' means post-FLC disposition is unrecorded. 'Completed' vs 'Commissioned' wording differs from uboat.net - see gaps.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-01
-
[3]uboat.net Allied Warships of WWII, USS YMS-73 (ship/9490), transcribing CTG 78.1 Oboe I report and COMTASKGROUP 78.2 / 78.2.9 Balikpapan reports [other_primary]
- Locator
- Ship data table; 'Notable events' sections for 1 May 1945 (Oboe I) and 1 Jul 1945 (Oboe II); cited sources at page foot
- Finding type
- vessel_history
- Finding
- uboat.net's Allied Warships entry for USS YMS-73, transcribing the action reports of the Tarakan and Balikpapan operations, places YMS-73 (commanded by Lt. J.H. Frederick, USNR) in Task Group 78.1.5, the minesweeping unit for Operation Oboe I (Tarakan landings, 1 May 1945), specifically Task Unit 78.1.52 'Sweep Unit Two' with YMS-51, YMS-68, and YMS-363; the ship then escorted a departing LCI echelon to Morotai on 5 May 1945. For the Balikpapan operation (Oboe II, Fox day 1 July 1945), YMS-73 is listed in the minesweeping unit TU 78.2.92 under Lt.Cdr. D.W. Blakeslee, USNR, with USS Cofer and USS LSM-1 as tenders. The same source gives: ordered 1 April 1941; laid down 22 July 1941; launched 23 April 1942; commissioned 22 January 1943; stricken 10 June 1947; built by Weaver Shipyards, Orange, Texas.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-04 to 1945-07
- Population
- Ship's company (~32) aboard during combat minesweeping operations, April-July 1945
- Limitations
- Secondary compilation naming this hull in operational task-unit rosters transcribed from U.S. Navy action reports; establishes presence in the Tarakan and Balikpapan minesweeping forces but not individual sweep-line detail for this hull. Unit-level narrative on the page records sister YMS hulls mined, shelled, or sunk during the same operations. No asbestos or materials content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-02
-
[4]NARA, Record Group 38 (Office of the Chief of Naval Operations), WWII War Diaries, Other Operational Records and Histories, NAID 77485672 - USS YMS-73 report of minesweeping operations supporting Brunei Bay assault landings, 6/7-12/45 (2 digitized images, read at image level 2026-10-05) [other_primary]
- Locator
- NARA catalog file unit NAID 77485672; microfilm serial 140652, serial 322; images A_1861/0819-0820.jpg
- Finding type
- vessel_history
- Finding
- The ship's own action report, 'Action Report, U.S.S. YMS-73 - BRUNEI BAY Operation, 7 June to 12 June 1945' (Serial 322, dated 29 June 1945, signed by commanding officer J.H. Frederick, addressed to Commander in Chief U.S. Fleet via CTU 78.1.5, CTG 78.1, and CTF 78 / Seventh Amphibious Force / Seventh Fleet), records: underway from Morotai 2 June 1945 with Echelon O-6-B of the Oboe Six attack group; entered Brunei Bay 7 June and cut three moored contact mines (Lat 05-08-21 N, Long 115-05-24 E) and six moored contact mines (Lat 05-08 N, Long 115-04-31 E); swept areas Saxaphone, Triangle, Trombone, and Alto 8-10 June with negative results; cut six moored contact mines in area Banjo on 11 June (approx Lat 05-11-30 N, Long 115-11-10 E); on 12 June one moored contact mine exploded in her port sweep gear (Lat 05-12-03 N, Long 115-09-06 E). The report states 'No battle damage was sustained by this vessel.'
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1945-06-02 to 1945-06-29
- Population
- Ship's company (~32) aboard during June 1945 combat minesweeping
- Limitations
- Primary source - the vessel's own combat report. Documents combat minesweeping under the Oboe VI operation and the hull's presence at Brunei Bay; contains no asbestos or materials information. Also documents that YMS-73 operated within TU 78.1.5 during Oboe VI, corroborating the uboat.net unit-roster placement pattern.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-03
-
[5]NARA catalog: NAID 192920713 (RG 24 Muster Rolls); NAIDs 134228183, 134263185, 78129653 (RG 38 WWII War Diaries, deck-log format) [other_primary]
- Locator
- NARA catalog file units; 192920713 spans 1/25/43-5/2/46; sibling war-diary units at /id/134228183, /id/134263185, /id/78129653
- Finding type
- vessel_history
- Finding
- NARA holds the vessel's personnel and log records: RG 24 (Bureau of Naval Personnel) muster-roll file unit 'YMS-73, 1/25/43-5/2/46' (NAID 192920713, 246 digitized images via Ancestry partnership) documents continuous personnel accounting from commissioning week through 2 May 1946; RG 38 war-diary/deck-log file units cover May 1943 (NAID 134228183, 34 images - the May 1943 submission is in standard N.Nav.330 'DECK LOG BOOK' format, verified at image level), 6/1-7/7/43 (NAID 134263185, 38 images), and 7/8-31/43 (NAID 78129653, 24 images).
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1943-1946
- Population
- All hands mustered aboard, 1943-01-25 through 1946-05-02
- Limitations
- Record existence verified at catalog level; apart from the May 1943 deck-log cover page, the daily content of these rolls and logs was not examined this session. Muster rolls ending 5/2/46 support service continuing at least to that date; decommissioning date itself is not stated in any located source. These records are the lead for reconstructing full underway history, yard periods, and any shipyard maintenance that could bear on materials exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-04
-
[6]ShipbuildingHistory (Tim Colton), Weaver Shipyards, Orange TX - yard history and build table [other_primary]
- Locator
- Yard build table, row 'YMS 73'; yard history paragraphs above the table
- Finding type
- vessel_history
- Finding
- Tim Colton's ShipbuildingHistory yard table for Weaver Shipyards, Orange TX lists 'YMS 73, US Navy, Minesweeper, 278 GT, delivered 22-Jan-43, Struck 1947.' The yard history states Weaver (founded 1897 as Joseph Weaver and Son, renamed Weaver Shipyards in 1941) was primarily a repair facility until WWII contracts to construct wooden minesweepers and subchasers were awarded in 1941 and 1942.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1943
- Population
- Construction trades at Weaver Shipyards, Orange TX, 1941-1943
- Limitations
- Authoritative secondary reference work on U.S. shipbuilding; corroborates builder, delivery date, tonnage, and the yard's wooden-minesweeper construction. 'Wooden' characterizes the hull material, consistent with the class's magnetic-mine-avoidance design. No asbestos or materials detail for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-05
-
[7]Naval History and Heritage Command, H-Gram H-051-1, 'The Last Sacrifices' (Director's Corner) [nhhc_danfs]
- Locator
- Sections 'Tarakan: Operation Oboe 1', 'Brunei Bay: Oboe 6', and Balikpapan/Oboe 2 narrative
- Finding type
- historical_record
- Finding
- NHHC H-Gram H-051-1 ('The Last Sacrifices', April-July 1945 Borneo minesweeping) documents the operational environment of the YMS units YMS-73 served in: the 2 May 1945 concealed Japanese 75 mm shore battery at Tarakan sank YMS-481 (six killed) and damaged YMS-364 while the unit swept in support of Oboe 1; at Balikpapan the YMS force grew to 38 boats amid Dutch, Japanese, and sophisticated U.S. air-dropped influence mines, with multiple YMS mined or sunk (YMS-50 on 18 June, YMS-365 and YMS-39 on 26 June) and under repeated shore-battery fire. The sweep areas and operating pattern - small wooden vessels detonating or cutting moored contact mines within small arms and artillery range - are documented.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-05
- Study period
- 1945-04 to 1945-07
- Population
- Seventh Fleet minesweeping crews, April-July 1945
- Limitations
- Official Navy historical narrative of the units and operations YMS-73 is independently documented to have served in (via uboat.net transcription and the ship's own NARA action report); the H-gram does not name YMS-73. Establishes operating environment only - no asbestos or materials content.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-06
-
[8]Corn, Jacqueline Karnell, and Jennifer Starr, 'Historical perspective on asbestos: Policies and protective measures in World War II shipbuilding,' American Journal of Industrial Medicine 11(3):359-373 (1987) [other_primary]
- Locator
- Abstract and article, AJIM 11(3):359-373
- Finding type
- asbestos_application
- Finding
- Peer-reviewed historical research documents that asbestos was used extensively as a fireproofing and insulating material in U.S. shipbuilding during World War II - the program and era under which this 1941-1943 wooden minesweeper was built - and that wartime demand drove unprecedented asbestos utilization aboard naval and merchant-type hulls.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1940s era documented; article 1987
- Population
- WWII shipyard workers and ship crews (class context)
- Limitations
- Program/era-level scholarly documentation of asbestos use in WWII shipbuilding generally; does not name this vessel, the YMS-1 class, or small wooden combatant craft. Does not establish that asbestos was or remains aboard this hull, nor quantity, location, condition, exposure, or causation. Wooden-hulled diesel-powered craft carried a materially smaller asbestos-relevant plant than steam-driven steel hulls.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-07
-
[9]Batch-9155 search ledger (this record): NavSource, uboat.net, NARA catalog, NHHC DANFS/H-gram, ShipbuildingHistory, Naval Vessel Register, Atlas class-profile set [other_primary]
- Locator
- search_ledger rows sl-uss-yms-73-01 through sl-uss-yms-73-08
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or docketed case naming YMS-73 was found in the public sources searched (see search_ledger). NavSource confirms no DANFS entry exists for this hull; the vessel predates the Naval Vessel Register; no class profile exists in the Atlas class dataset.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - era construction makes some asbestos-containing components plausible. Does not establish or defeat any claim of exposure or legal eligibility. CourtListener coverage is logged in the search ledger per its session status.
- Atlas source
- true
- Evidence ID
- ev-uss-yms-73-08