Evidence
8 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-8).
-
[1]U.S. GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (18 October 1979), reproducing CNO enclosure 1, attachment 1 (5 January 1979) [gao]
- Locator
- PDF p. 21, printed enclosure p. 11, Large Harbor Tug–YTB table, rows 827–832 and horizontal divider
- Finding type
- historical_record
- Finding
- The Navy's January 1979 ship list names DEKANAWIDA, hull 831, with construction start 6/73 and delivery 10/74. On the scanned table, YTB-831 falls below the divider after YTB-827 in the group labeled 'Asbestos-free thermal insulation' beside YTB-832; the earlier YTB-817 through YTB-827 group is labeled 'Asbestos thermal insulation.'
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The table reports original thermal-insulation status for machinery, equipment and piping, not an itemized hull survey. It does not establish that all shipboard materials were asbestos-free, that no asbestos was later introduced, or that any worker was or was not exposed. The group boundary was verified visually on the report facsimile, because text extraction alone obscures the divider.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-01
-
[2]U.S. GAO, HRD-80-2, CNO enclosures (January and February 1979) [gao]
- Locator
- PDF pp. 22–23, printed enclosure pp. 12–13, Note 1 and class weight table
- Finding type
- historical_record
- Finding
- The Navy attachment defines thermal insulation as insulation for machinery, equipment and piping, and notes that asbestos was also used in other shipboard applications, including gaskets and pipe-hanger liners. Its later 6,858-pound figure is an estimate of total thermal insulation for the large-harbor-tug class, not an asbestos weight for Dekanawida.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-24
- Limitations
- Generic Navy practice and a YTB class estimate do not prove that Dekanawida carried asbestos-containing gaskets or liners, or any particular amount of thermal insulation. No class estimate is entered as a hull-specific asbestos quantity.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-02
-
[3]NavSource Online, Service Ship Photo Archive, Dekanawida (YTB-831), updated 27 May 2016 [other_primary]
- Locator
- Natick Class District Harbor Tug chronology and Specifications
- Finding type
- vessel_history
- Finding
- NavSource records YTB-831 as a Natick-class harbor tug laid down at Marinette Marine, Wisconsin, on 22 January 1974, launched 12 September 1974, and delivered to the Navy and placed in service 31 October 1974; it lists diesel single-screw propulsion.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- NavSource is a specialist archive rather than an original Navy construction record. GAO independently corroborates the October 1974 delivery month, not the exact day, builder, keel or launch dates. Its crew figure is excluded pending DANFS/NHHC confirmation; no asbestos inference is drawn from diesel propulsion or construction date.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-03
-
[4]Naval History and Heritage Command photo catalog, DN-SN-88-09235 [nhhc_danfs]
- Locator
- Catalog DN-SN-88-09235, caption and original date
- Finding type
- vessel_history
- Finding
- An NHHC cataloged Navy photograph identifies USS Dekanawida (YTB-831) underway near Naval Air Station Rota, Spain, during a joint EOD/SEAL parachuting exercise on 9 October 1986.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- Photographic service evidence only. The caption does not document insulation, asbestos, maintenance, crew exposure, or present status.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-04
-
[5]Defense Visual Information Distribution Service, The tugboats of GTMO, image 1877325 and story 160191 (April 2015) [other_primary]
- Locator
- Image caption/date; companion story https://www.dvidshub.net/news/160191/tugboats-gtmo
- Finding type
- vessel_history
- Finding
- A Joint Task Force Guantanamo photograph documents U.S. Navy YTB-831 Dekanawida assisting the Guantanamo Bay Express barge at Naval Station Guantanamo Bay on 1 April 2015; a companion DoD report describes the station's Natick-class tugs as Navy-owned and civilian-contractor operated in 2015.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The photo verifies the vessel's 2015 operation, not its present location or material condition. The contractor-operation statement is for the three station tugs collectively; individual manning records were not located.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-05
-
[6]National Archives, Special List 44—Named Vessels, Dekanawida and Agnes Foss entries [other_primary]
- Locator
- Dekanawida (YT-334, Agnes Foss), 1 January 1943–31 December 1944; Agnes Foss cross-reference
- Finding type
- historical_record
- Finding
- NARA's World War II logbook index lists an earlier Dekanawida as YT-334 (also Agnes Foss), with records dated 1943–1944. Those records belong to a different hull, not YTB-831, delivered in 1974.
- Verification
- verified
- Role
- correction
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Limitations
- Identity disambiguation only. NARA's index does not supply an asbestos finding for either tug and cannot support WWII-era metadata for YTB-831.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-06
-
[7]Batch-9486 official-source search ledger for USS Dekanawida (YTB-831) [other_primary]
- Locator
- search_ledger rows sl-uss-dekanawida-ytb831-01, -03, -04, -06, -07, -08
- Finding type
- historical_record
- Finding
- No hull-specific asbestos survey, abatement record, or material inventory for YTB-831 was located in the official Navy, NARA, GAO, or government document searches recorded in the ledger.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- This describes the result of a bounded public-source search, not proof that such records do not exist. It does not contradict the Navy's 1979 thermal-insulation classification or establish presence or absence of asbestos in other materials.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-07
-
[8]Batch-9486 authenticated CourtListener search ledger, four exact-identifier queries [other_primary]
- Locator
- search_ledger rows sl-uss-dekanawida-ytb831-09 through sl-uss-dekanawida-ytb831-12; each HTTP 200, count 0
- Finding type
- litigation_documented
- Finding
- Authenticated CourtListener v4 exact-name (Dekanawida) and exact-hull (YTB-831) searches returned zero results in both the opinion and RECAP docket indexes on 24 September 2026; no qualifying asbestos case was located in those indexes.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- A zero-result index search is not proof that no lawsuit, unindexed pleading, sealed matter, or differently worded reference exists. No complaint, discovery record, trial finding or judgment was found to classify; no individual exposure conclusion follows.
- Atlas source
- true
- Evidence ID
- ev-uss-dekanawida-ytb831-08