Evidence
7 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-7).
-
[1]Naval History and Heritage Command, Dictionary of American Naval Fighting Ships, 'Iona II (YTB-220)' [nhhc_danfs]
- Locator
- Iona II entry, history paragraphs 1-2; search-indexed text retrieved 2026-09-24
- Finding type
- vessel_history
- Finding
- NHHC's Iona II entry identifies YTB-220 as a wooden tug, originally YT-220, launched at Greenport Basin & Construction Co. on 26 August 1944 and placed in service on 2 February 1945. It records Pearl Harbor harbor duty, transfer to the Philippines in 1955, reclassification as YTM-220 in February 1962, accidental sinking in May 1963, and disposal by burning in June 1963.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The official page was indexed with this text but returned HTTP 404 on direct retrieval during this batch. It contains no asbestos information, crew figure, propulsion specification, or exposure finding. DANFS says placed in service, not commissioned.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-01
-
[2]U.S. Navy, Naval Vessel Register, 1 January 1949, NAVSHIPS 18-1-11 [other_primary]
- Locator
- Printed page 234, YTB-220 row (PDF page 235)
- Finding type
- historical_record
- Finding
- The 1 January 1949 Naval Vessel Register lists IONA, YTB-220, under Harbor Tug Big, with vessel status ACT and status code 1.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- A Navy status snapshot, not an asbestos inventory or evidence of individual work or exposure. The scan is hosted by a private archive but reproduces the original Navy register.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-02
-
[3]Naval History and Heritage Command, 'Dawson (APA-79),' photograph caption [nhhc_danfs]
- Locator
- Caption: Dawson underway at Pearl Harbor, assisted by Iona, 19 March 1946
- Finding type
- historical_record
- Finding
- NHHC's Dawson history captions a Navy photograph of Iona (YTB-220) assisting Dawson (APA-79) at Pearl Harbor on 19 March 1946.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The official page returned HTTP 404 on direct retrieval; indexed caption text is the accessible evidence. The photo caption proves only this harbor operation and gives no information about asbestos, crew, or repairs.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-03
-
[4]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' [other_primary]
- Locator
- Beginning Research; Bureau of Ships correspondence; Cartographic Branch, S39
- Finding type
- historical_record
- Finding
- NARA's guide says asbestos use in U.S. Navy materiel during 1941-1961 requires vessel-specific archival research and identifies RG 19 Bureau of Ships correspondence and S39 insulation/lagging drawings as potential records to consult.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-24
- Limitations
- This guide discusses Navy materiel during Iona's service era but does not identify Iona, her class, any product installed aboard her, or any exposure. The suggested RG 19 files and drawings were not inspected in this batch.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-04
-
[5]U.S. Government Accountability Office, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (1979) [gao]
- Locator
- Highlights, paragraphs 1-2
- Finding type
- historical_record
- Finding
- GAO's 1979 report describes asbestos insulation in Navy ships and later Navy policies for removal and replacement during repair work.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Limitations
- GAO examined Long Beach and Norfolk naval shipyards and a 1970s Navy policy, after Iona's 1963 disposal. The report does not name Iona and cannot establish asbestos aboard her or a repair at either reviewed yard.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-05
-
[6]National Archives, Ship Plan Index, IONA / YT-220 entry [other_primary]
- Locator
- IONA, YT-220, RG 19 Hull series, NAID 153716467; https://catalog.archives.gov/id/153716467
- Finding type
- historical_record
- Finding
- NARA's Ship Plan Index lists IONA, YT-220, in Record Group 19's Hull series of Ship Engineering Drawings, catalog identifier 153716467.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The index identifies a record series and catalog item, not the contents or digitization status of the drawings. No insulation or asbestos drawing was inspected, and the index does not establish any material aboard Iona.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-06
-
[7]Batch 9390 official-source search ledger, rows sl-uss-iona-ytb220-01 through -06 [other_primary]
- Locator
- search_ledger sl-uss-iona-ytb220-01 through -06
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, materials list, abatement record, or exposure document for Iona/YT/YTB-220 was located in the official public sources searched in this batch.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- A bounded negative result for searched public sources only. It does not establish asbestos absence, disprove exposure, or include the uninspected NARA engineering drawings or RG 19 correspondence. CourtListener litigation searches are separately tracked and are not implied complete here.
- Atlas source
- true
- Evidence ID
- ev-uss-iona-ytb220-07