Evidence
6 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-6).
-
[1]U.S. Navy photograph 19-N-79531, National Archives; reproduced in the Shipscribe harbor-tug photo gallery from NavSource image 140925402 [other_primary]
- Locator
- Photo 19-N-79531; caption in https://www.shipscribe.com/usnaux/YT/YT119-p.html, Menatonon entry
- Finding type
- vessel_history
- Finding
- U.S. Navy photograph 19-N-79531 identifies Menatonon as YTB-254 in San Francisco Bay on 14 September 1944. The photograph documents the completed tug in wartime Navy service by that date.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Study period
- 1944-09-14
- Limitations
- The official photograph is accessed through a reproduction and caption, not a retrieved NARA catalog record. It establishes appearance, identity, location and date, not commissioning, crew, machinery, asbestos content, work performed, or later disposition.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-01
-
[2]U.S. Navy Radio Call Sign Book, section 18, U.S. Navy Ships by Classes (HyperWar transcription of Navy publication) [other_primary]
- Locator
- Section 18, page 18-114, YTB254 MENATONON NXQM
- Finding type
- historical_record
- Finding
- A wartime U.S. Navy radio call sign book lists MENATONON as YTB-254 with call sign NXQM, independently corroborating the name and YTB designation.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Study period
- World War II
- Limitations
- The online text is a transcription of an official Navy list. Its precise edition date was not verified. It supports identification and call sign only; it gives no construction, service, material, or exposure detail.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-02
-
[3]National Institute for Occupational Safety and Health, 100 Years of Respiratory Protection History, 1920–1950 section [other_primary]
- Locator
- 1920–1950 section, World War II Navy asbestos paragraph
- Finding type
- historical_record
- Finding
- NIOSH's historical account says the U.S. Navy increased its use of asbestos for pipe insulation in naval vessels during World War II. This provides period context for research into Menatonon, which is documented as a wartime Navy tug.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-09-25
- Study period
- World War II
- Population
- U.S. Navy ship construction and service generally
- Limitations
- Program and era context only. NIOSH does not name Menatonon or harbor tugs, establish that this hull had asbestos pipe insulation, or document any individual exposure. No product is attributed to Menatonon from this row.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-03
-
[4]National Archives, Researching Asbestos aboard US Naval Vessel up through 1961 [other_primary]
- Locator
- Cartographic Branch, RG 19 ship engineering drawings and S39/S48 filing codes
- Finding type
- historical_record
- Finding
- NARA directs hull-specific Navy asbestos research to RG 19 engineering drawings, including the hull-number series and S39 insulation and lagging or S48 piping material groups. Menatonon/YT-254 drawings are an archival lead; no drawing for this hull was retrieved.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-25
- Study period
- Potential 1940s construction records
- Limitations
- The guide describes a research route, not a located Menatonon plan. It does not establish that the relevant drawings exist for YT-254 or that any material shown in them was installed on this tug.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-04
-
[5]U.S. Navy, Chief of Naval Operations, Ocean-Going Tugs and Harbor Tugs—Recommendations for Reclassification, Op-23-S-jk Ser. 95223 (13 April 1944), Secretary of the Navy first endorsement; transcription at Researcher@Large [other_primary]
- Locator
- Enclosure A YT-254 / YTB-254 Menatonon row; paragraph 3 effective date; Secretary of the Navy first endorsement approval
- Finding type
- historical_record
- Finding
- Chief of Naval Operations memorandum Op-23-S-jk Ser. 95223, approved by the Secretary of the Navy on 13 April 1944, lists MENATONON YT-254 for redesignation YTB-254, effective 15 May 1944. The memorandum explicitly covers tugs in commission, in service, or building, so it does not by itself establish which status Menatonon held on the memorandum date.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Study period
- 1944-04-13 to 1944-05-15
- Limitations
- Official Navy memorandum accessed through a transcription rather than its archival original. It establishes the approved designation change, not a specific construction, delivery, commissioning, service, propulsion, or asbestos fact for this tug.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-06
-
[6]Batch 9334 source-search ledger: Navy photograph 19-N-79531; CNO reclassification memorandum; U.S. Navy call sign book; NARA asbestos and ship-plan guides; NHHC/DANFS and NVR search [other_primary]
- Locator
- search_ledger sl-uss-menatonon-yt254-01 through -08; CourtListener sweep partly pending
- Finding type
- historical_record
- Finding
- The public authoritative sources reviewed for this batch yielded no Menatonon-specific asbestos survey, material specification, abatement record, or exposure finding. Asbestos status aboard YT/YTB-254 remains unknown.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-25
- Study period
- 2026-09-25 search
- Limitations
- Limited public-source search, with no hull drawing, work package, or survey retrieved. A missing public record cannot prove that asbestos was absent, nor establish presence, exposure, or causation. The exact-name CourtListener opinion search returned zero hits, but docket and hull-number searches remain an explicit gap because the authenticated helper lacked fleet pacing slots.
- Atlas source
- true
- Evidence ID
- ev-uss-menatonon-yt254-05
