Evidence
4 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-4).
-
[1]U.S. Navy Bureau of Ships, Naval Vessel Register, NAVSHIPS 18-1-11 (1 January 1949) [other_primary]
- Locator
- Printed p. 236, YTB-511 row (PDF p. 237)
- Finding type
- vessel_history
- Finding
- The Bureau of Ships Naval Vessel Register lists CARASCAN as YTB-511 with vessel status ACT and status code 1 in its January 1949 list of service craft.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 1949-01-01
- Limitations
- This register establishes hull identity and active status as of the register date. It contains no asbestos inventory, equipment material identification, exposure history, or crew figure for this vessel.
- Atlas source
- true
- Evidence ID
- ev-uss-carascan-ytb511-01
-
[2]National Archives, Ship Plan Index [other_primary]
- Locator
- CARASCAN | YTB-511 | 19 | Microfilm | 175668587
- Finding type
- historical_record
- Finding
- The National Archives Ship Plan Index lists CARASCAN, YTB-511, in Record Group 19 microfilm, catalog identifier 175668587.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- An index entry confirms a potential plans collection, not the contents of the microfilm. No asbestos, construction detail, or material specification is established by this index.
- Atlas source
- true
- Evidence ID
- ev-uss-carascan-ytb511-02
-
[3]Batch 9428 source search ledger [other_primary]
- Locator
- search_ledger entries sl-uss-carascan-ytb511-01 through -03 and -09
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, abatement record, material specification, or exposure finding for Carascan was located in the public primary sources searched in this batch.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 2026-09-24
- Limitations
- This is a bounded search result, not proof that asbestos was absent aboard the tug. The NARA microfilm itself was not examined, and unpublished Navy maintenance and procurement files may contain relevant evidence.
- Atlas source
- true
- Evidence ID
- ev-uss-carascan-ytb511-03
-
[4]Naval History and Heritage Command, Ship Abbreviations and Symbols [nhhc_danfs]
- Locator
- YTB -- large harbor tug
- Finding type
- historical_record
- Finding
- The Naval History and Heritage Command defines the Navy hull symbol YTB as 'large harbor tug'; the 1949 register applies YTB to Carascan.
- Verification
- verified
- Role
- supporting
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Limitations
- A hull-symbol definition establishes vessel type when combined with the hull-specific register; it says nothing about this tug's machinery, construction materials, asbestos, or crew.
- Atlas source
- true
- Evidence ID
- ev-uss-carascan-ytb511-04