Evidence
5 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-5).
-
[1]National Archives, Ship Plan Index, CANOCAN / YT-290 row [other_primary]
- Locator
- CANOCAN | YT-290 | 19 | Hull series of Ship Engineering Drawings | 153716502
- Finding type
- historical_record
- Finding
- The National Archives Ship Plan Index lists CANOCAN, YT-290, in Record Group 19's Hull series of Ship Engineering Drawings, catalog identifier 153716502.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The index identifies an archival drawing series; it does not reproduce the plans or establish construction dates, builder, machinery, asbestos content, Navy service date, or subsequent designations.
- Atlas source
- true
- Evidence ID
- ev-uss-canocan-yt290-01
-
[2]Naval History and Heritage Command, Ship Abbreviations and Symbols [nhhc_danfs]
- Locator
- Y designation entries, YT / YTB / YTM
- Finding type
- historical_record
- Finding
- NHHC's ship abbreviation reference defines YT as harbor tug, YTB as large harbor tug, and YTM as medium harbor tug.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Limitations
- This glossary defines designations generally; it does not show that Canocan ever bore YTB-290 or YTM-290, or identify its equipment or asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-canocan-yt290-02
-
[3]Batch 9350 search ledger, NARA and NHHC entries [other_primary]
- Locator
- search_ledger sl-uss-canocan-yt290-01 through sl-uss-canocan-yt290-04
- Finding type
- historical_record
- Finding
- No public ship-specific asbestos survey, abatement file, or material list was located in the completed NARA ship plan index and NHHC searches. The NARA drawing entry remains an archival lead, not a reviewed plan set.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 2026-09-24
- Limitations
- A search result, not proof that no asbestos was aboard. The cataloged drawings were not inspected; non-digitized records may exist. It establishes neither individual exposure nor legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-canocan-yt290-03
-
[4]U.S. Coast Guard, Coast Guard Sector Juneau, contractors successfully recover submerged tugboat, 2023-02-28 [other_primary]
- Locator
- Press release opening paragraphs, recovery and disposal description
- Finding type
- environmental_record
- Finding
- The Coast Guard reported that the tug Tagish was recovered at Gastineau Channel in February 2023, dewatered and defueled, then dismantled for disposal outside Alaska.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Study period
- 2023-02
- Limitations
- The Coast Guard calls the vessel Tagish and does not identify it as Canocan, YT-290, or YTB-290. This row documents a possible identity lead, not Canocan's confirmed fate or an asbestos condition.
- Atlas source
- true
- Evidence ID
- ev-uss-canocan-yt290-04
-
[5]Alaska Department of Environmental Conservation, FY2023 SPAR Annual Report, Tagish section [other_primary]
- Locator
- PDF page 13, Tug Tagish Sinking at National Guard Dock in Juneau
- Finding type
- environmental_record
- Finding
- Alaska DEC's FY2023 SPAR report says the tug Tagish sank at its Juneau dock overnight before 2022-12-29 and describes it as a 107-foot wood-plank-hull former World War II fireboat.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Study period
- 2022-12
- Limitations
- The report never connects Tagish to Canocan or Navy hull 290 and does not discuss asbestos. Its wood-hull description conflicts with a secondary registry's steel-hull description for the alleged same vessel; identity requires a primary documentation chain.
- Atlas source
- true
- Evidence ID
- ev-uss-canocan-yt290-05