Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
-
[1]research packet 1100-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-canonicus-yt187-pkt-1100-packet-md
-
[2]Naval History and Heritage Command, Dictionary of American Naval Fighting Ships, 'Canonicus III (YT-187)' [nhhc_danfs]
- Locator
- Complete brief DANFS entry, paragraph III
- Finding type
- vessel_history
- Finding
- NHHC's Canonicus III entry identifies YT-187 as the third Canonicus, placed in service on 3 June 1941, serving in the 1st and 5th Naval Districts, and transferred to the Maritime Commission for disposal on 30 April 1947.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Limitations
- Documents identity and service only. It gives no builder, machinery, crew figure, asbestos material, work location within a yard, or exposure history; 'placed in service' is not proof of formal commissioning.
- Atlas source
- true
- Evidence ID
- ev-uss-canonicus-yt187-01
-
[3]National Archives, Special List 44, by Ship Numbers [other_primary]
- Locator
- PDF page 135 (zero-index page 134), YT-187 entry
- Finding type
- historical_record
- Finding
- NARA Special List 44's ship-number index lists YT-187 (Canonicus) with deck-log coverage dated 1 July 1941 through 31 December 1942.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Limitations
- This is a holdings index, not reviewed deck logs. Its date span is coverage in the listed collection, not the vessel's complete service period, and it does not establish shipboard materials or asbestos exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-canonicus-yt187-02
-
[4]National Archives, 'Researching Asbestos aboard US Naval Vessel up through 1961' [other_primary]
- Locator
- Beginning Research; RG 19 discussion; Ship Engineering Drawings, S39 and S48 paragraphs
- Finding type
- asbestos_application
- Finding
- NARA's guide treats asbestos in U.S. Navy materiel in 1941-1961 as a research subject and directs vessel-specific inquiry to Bureau of Ships RG 19 correspondence and engineering drawings, particularly S39 insulation and lagging and S48 piping files.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-25
- Limitations
- General Navy-era research guidance only. It does not mention Canonicus or YT-187 and does not show any asbestos product was installed, disturbed, or retained aboard this tug. RG 19 files for this hull were not reviewed.
- Atlas source
- true
- Evidence ID
- ev-uss-canonicus-yt187-03
-
[5]Batch 9320 source search ledger in this record [other_primary]
- Locator
- search_ledger rows sl-uss-canonicus-yt187-01 through -05
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos source was located in the NHHC Canonicus III history, NARA Special List 44 index, NARA asbestos research guide, or public web searches recorded in the search ledger.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Limitations
- A bounded search result, not proof that the vessel lacked asbestos or that no undigitized record exists. No finding about any sailor's exposure, disease, or legal claim follows from this result.
- Atlas source
- true
- Evidence ID
- ev-uss-canonicus-yt187-04
-
[6]Naval History and Heritage Command, 'Ship Abbreviations and Symbols' [nhhc_danfs]
- Locator
- Alphabetical ship-designation list, YT entry
- Finding type
- vessel_history
- Finding
- NHHC's ship abbreviation list defines YT as harbor tug; applied to the YT-187 designation in the ship's DANFS entry, it identifies Canonicus as a harbor tug.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-25
- Limitations
- Defines a Navy vessel type, not this tug's equipment, materials, operation at a specific yard, crew count, or asbestos exposure.
- Atlas source
- true
- Evidence ID
- ev-uss-canonicus-yt187-05