Evidence
4 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-4).
-
[1]Naval History and Heritage Command, Dictionary of American Naval Fighting Ships, Mamo (YT-325) [nhhc_danfs]
- Locator
- Complete short vessel entry; indexed text reviewed; live URL returned HTTP 404 on 2026-09-24
- Finding type
- vessel_history
- Finding
- Mamo was built in January 1931 by Bethlehem Shipbuilding Corp. in San Francisco; the Navy acquired her from Young Brothers Ltd. of Honolulu and commissioned her there on 9 May 1942. Assigned to the 14th Naval District, she served out of Pearl Harbor through World War II. She was redesignated from YT-325 to YTM-325 on 13 April 1944 and to YTB-325 on 15 May 1944, then returned to her owner on 5 February 1946.
- Verification
- partial
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 1931-1946
- Limitations
- Official NHHC entry supports identity and chronology but does not identify propulsion, crew, asbestos materials, repairs, exposure, or post-return disposition. Its indexed text was available while direct retrieval returned HTTP 404; verify against a restored page or NHHC copy before publication.
- Atlas source
- true
- Evidence ID
- ev-uss-mamo-yt325-01
-
[2]National Archives and Records Administration, Special List 44, Named Vessels [other_primary]
- Locator
- Alphabetical Mamo rows, near Manatee
- Finding type
- historical_record
- Finding
- NARA Special List 44 lists Mamo (YT-325) deck-log spans dated 9 May 1942 through 30 September 1944 and 1 January through 31 March 1945.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 1942-1945
- Limitations
- The list identifies log spans; individual log pages were not reviewed. NARA explains deck logs do not directly document shipboard asbestos. Missing months in this index are not proof that no logs exist. The index retains YT-325 even though NHHC reports later designations.
- Atlas source
- true
- Evidence ID
- ev-uss-mamo-yt325-02
-
[3]National Archives and Records Administration, Researching Asbestos aboard US Naval Vessel up through 1961 [other_primary]
- Locator
- Beginning Research; Cartographic Branch; Other Records and their usefulness
- Finding type
- historical_record
- Finding
- NARA's Navy asbestos research guide identifies RG 19 Bureau of Ships correspondence, ship engineering drawings under hull-number and material-group codes including S39 (insulation and lagging) and S48 (piping), and related specifications as possible research paths. It states deck logs and muster rolls provide no direct evidence of asbestos in ship components.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-09-24
- Study period
- Potential 1931-1946 vessel records
- Limitations
- Repository guidance only. No Mamo-specific RG 19 file, drawing, specification, or asbestos reference was retrieved; coverage for this commercially built acquired tug is unconfirmed. It cannot establish any material aboard Mamo.
- Atlas source
- true
- Evidence ID
- ev-uss-mamo-yt325-03
-
[4]Batch 9352 search ledger: NHHC DANFS Mamo entry; NARA Special List 44; NARA Navy asbestos research guide [other_primary]
- Locator
- search_ledger sl-uss-mamo-yt325-01 through sl-uss-mamo-yt325-03
- Finding type
- historical_record
- Finding
- No ship-specific asbestos documentation was found in the official NHHC vessel entry, NARA Special List 44, or NARA's general asbestos research guide; none identifies an asbestos-containing product, survey, abatement activity, or exposure aboard Mamo.
- Verification
- partial
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Study period
- 2026-09-24 search
- Limitations
- This is a limited public-source search result, not proof that asbestos was absent. NHHC's live page returned HTTP 404; the indexed entry was reviewed. NARA log pages and RG 19 holdings were not reviewed. No conclusion about individual exposure or causation follows.
- Atlas source
- true
- Evidence ID
- ev-uss-mamo-yt325-04