Evidence
11 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-11).
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[1]research packet 1096-packet.md (1 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-banaag-yt104-pkt-1096-packet-md
-
[2]DANFS, 'Banaag (Tug) 1911-1942,' Robert J. Cressman, 2 March 2006 (NHHC, published 15 May 2018; live page verified 2026-10-05) [nhhc_danfs]
- Locator
- DANFS entry, full narrative + spec block
- Finding type
- vessel_history
- Finding
- Documented for this hull: composite-hull, copper-sheathed tug built 1910 at Hong Kong by the Whampoa Dock Co.; delivered to the U.S. Navy 1 February 1911 and placed in service at the naval station at Olongapo, P.I., serving there for three decades; classified district tug YT-104 on 17 July 1920. December 1941: on duty at Olongapo; on 18 December reported 'tied up across the bay so that she will not be endangered if the station proper' should be bombed; her 3-pounder gun had been turned over to the 4th Marine Regiment, recently arrived from Shanghai, for use as artillery; 'may well have been destroyed while the Olongapo Naval Station was being demolished on Christmas Day 1941.' Stricken from the Navy Register 24 July 1942 and subsequently listed as 'lost due to enemy occupation.' Spec block: tonnage 125; length 96'0"; beam 16'0"; draft 7'6-3/8"; armament 1 3-pounder. Name is a Philippine word meaning 'dawn' in the Tagalog dialect.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1910-1942
- Population
- Hong Kong construction trades (1910); U.S. Navy station personnel and transient tug crews, Olongapo (1911-1941)
- Limitations
- Ship-specific history only; contains no asbestos or material-content information. Loss is hedged in the source itself ('may well have been destroyed'; subsequently 'listed as lost due to enemy occupation') - the exact loss mechanism (U.S. demolition vs. Japanese action) is not resolved by DANFS. No complement or launch/lay-down dates are given.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-01
-
[3]NHHC, 'Casualties: U.S. Navy and Coast Guard Vessels - Sunk or Damaged Beyond Repair during World War II, 7 December 1941-1 October 1945,' Navy District Craft > Harbor Tug (YT) section (live page verified 2026-10-05) [other_primary]
- Locator
- Casualty list page, 'Navy District Craft' section, 'Harbor Tug (YT)' subsection
- Finding type
- vessel_history
- Finding
- Official Navy casualty history corroborates in-scope WWII service and loss: 'USS Banaag (YT-104) lost due to enemy action in the Philippine Islands and stricken from the Navy List, 24 July 1942.' The entry appears in the Harbor Tug (YT) section alongside USS Iona (YT-107), sunk by Japanese aircraft at Cavite 2 January 1942, and USS Mercedes (YT-108), destroyed to prevent capture at Cavite 2 January 1942.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941-1942
- Population
- U.S. Navy district-craft personnel, Philippine Islands (December 1941 loss window)
- Limitations
- Establishes that the Navy officially recorded this hull as a WWII casualty ('lost due to enemy action') - corroborating in-scope wartime service - but gives no loss date or mechanism and contains no asbestos content. Note the wording difference vs. DANFS ('lost due to enemy occupation'); carried faithfully as printed.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-02
-
[4]U.S. Navy Department, Navy Filing Manual (4th edition, 1941) - hull-number and name indexes (NHHC online reading room transcription, live page verified 2026-10-05) [other_primary]
- Locator
- Filing Manual 1941, ship/hull-code index (YT series) and alphabetical index, 'Banaag' entries
- Finding type
- historical_record
- Finding
- The official 1941 Navy Filing Manual indexes 'YT104 Banaag' in both the hull-number subject list ('YT104 Banaag.') and the alphabetical name index ('YT104 | Banaag.'). Adjacent hull codes YT71, YT72, YT73, YT81, YT106 (Christine), and YT111 (Delaware) are marked '(stricken)' while YT104 is not - confirming Banaag was a current unit under her official filing code on the eve of war. This also establishes the archival pathway: Bureau of Ships correspondence for this hull is filed under 'YT104' (see NARA row ev-uss-banaag-yt104-09).
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1941 (edition in force)
- Population
- Navy administrative correspondence population for this hull code (1941)
- Limitations
- Establishes official designation and in-service status in 1941 only; contains no asbestos content. The filing-manual listing does not locate the hull or state its condition.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-03
-
[5]NavSource Online: Service Ship Photo Archive, Banaag (YT-104) - timeline, specifications, campaign participation, awards (live https URL verified 2026-10-05) [other_primary]
- Locator
- NavSource 14/08104.htm header block, campaign table, and specifications block; 'no images available' notice
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: built as the copper-sheathed composite-hull tug Banaag by Whampoa Dock Co., Hong Kong, BCC; launched, date unknown; delivered to the U.S. Navy 1 February 1911; placed in service as Banaag, 1 February 1911, at Naval Station Olongapo, P.I.; designated District Harbor Tug YT-104, 17 July 1920; assigned to the Asiatic-Pacific Theater and credited with the Philippine Islands operation, 8 to 25 December 1941 (Asiatic-Pacific Campaign); struck from the Naval Register 24 July 1942; final disposition 'believed destroyed, 25 December 1941 when Japan occupied Naval Station Olongapo.' Awards displayed: American Defense Service Medal; Asiatic-Pacific Campaign Medal; World War II Victory Medal; Philippine Defense Medal. Specifications: displacement 125 t.; length 96'; beam 16'; draft 7'6"; speed unknown; complement unknown; armament one 3-pdr; propulsion steam, single screw. No images of the hull are held.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 1910-1942
- Population
- U.S. Navy district-craft personnel, Olongapo (1911-1941)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - milestone dates track DANFS/Navy Register but the page adds campaign/award compilations that are not independently adjudicated for a 1910-41 district craft. Contains no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-04
-
[6]D.X. Wright, 'United States Asiatic Fleet Order of Battle, December 1941' (asiaticfleet.com) - 16th Naval District / Cavite Navy Yard yard-craft table (secondary compilation from official narratives) [other_primary]
- Locator
- orbat.htm, 16th Naval District > Cavite Navy Yard > 'Yard craft assigned to 16th Naval District' table and note
- Finding type
- historical_record
- Finding
- Secondary order-of-battle compilation places Banaag among the yard craft assigned to the 16th Naval District: '3 x yard tugs | BANAAG (YT-104), IONA (YT-107), MERCEDES (YT-108),' under Cavite Navy Yard / 16th Naval District (Rear Admiral Francis Warren Rockwell, Commandant), with the note 'None of these district vessels had crews permanently assigned; many were non-self propelled.' Naval Station Olongapo is listed separately under Lt. (jg) Vance C. Prewitt - consistent with DANFS placing the tug at Olongapo within the district's yard-craft pool.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- December 1941
- Population
- 16th Naval District yard-craft pool; Olongapo station personnel
- Limitations
- Well-documented secondary compilation (drawn on official narratives and source documents, per the author's footnotes), not an official publication - carried as context with partial verification. The 'no permanently assigned crews' note explains why no complement figure exists for this hull but is not itself a primary record.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-05
-
[7]Era inference built on: NavSource/DANFS spec block (steam, single screw, built 1910); Hedley-Whyte & Milamed 2008 (PMC2604477, ev-uss-banaag-yt104-07); GAO HRD-80-2 program documentation (ev-uss-banaag-yt104-08) [other_primary]
- Locator
- Composite inference: NavSource spec block (steam, single screw); PMC2604477 era documentation; GAO HRD-80-2
- Finding type
- asbestos_application
- Finding
- A composite-hull, copper-sheathed steam harbor tug built in 1910 for U.S. Navy service sits inside the documented era of marine and naval asbestos use: by the early twentieth century asbestos was established as the standard insulating material, and the U.S. Navy specified asbestos for gaskets, insulation, packing, and tape in new construction from at least 1922 - inside this hull's 1911-1941 service window. Era-standard applications aboard a steam tug of this type and period: boiler and steam-pipe insulation (lagging), gaskets, and valve packing around the steam plant.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1910-1941
- Population
- Hong Kong construction trades (1910); Olongapo station personnel and transient crews (1911-1941)
- Limitations
- Class/era inference only - no hull-specific material list, insulation survey, build specification, or work package located for YT-104; the Whampoa Dock Co. build records and any Navy overhaul records for this hull are not digitized. Names era-standard applications, not confirmed installed materials. No quantity. No manufacturer attribution. The 1922 Navy specification date post-dates her 1910 construction - the inference rests on era-standard marine practice plus Navy maintenance practice within her service window, not on a documented specification for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-06
-
[8]Hedley-Whyte J, Milamed DR. 'Asbestos and Ship-Building: Fatal Consequences.' Ulster Medical Journal 2008 Sep;77(3):191-200 (PMC2604477) [other_primary]
- Locator
- PMC2604477, 'Logistics of Asbestos' and 'Shipbuilding' sections
- Finding type
- asbestos_application
- Finding
- Peer-reviewed historical review documents the asbestos era relevant to this hull's construction and service: 'In the early Twentieth Century scientific methods of measuring fire-resistance of materials showed that asbestos was the best and most cost effective insulating material'; 'In 1922 the US Navy specified asbestos use in new submarines. South African chrysotile asbestos was specified for gaskets, insulation, packing and tape'; asbestos use averaged 783 million pounds/year in the U.S. during WWII, and the January 20, 1942 Asbestos Conservation order prioritized naval ship-building. 'Shipbuilding in World War II is a significant aetiology of the malignancies caused by asbestos.'
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1900-1945 (era reviewed)
- Population
- Shipbuilding and Navy populations of the era (general context)
- Limitations
- Peer-reviewed secondary review, not a hull record - does not name this vessel or any district craft; documents era practice only. The Navy-specification item cited (1922, submarines) post-dates this hull's 1910 construction; carried as service-window-era context, not build specification.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-07
-
[9]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) [gao]
- Locator
- GAO product page HRD-80-2 (full text blocked to automated fetch; product-page description used)
- Finding type
- gov_survey
- Finding
- GAO documented the Navy's asbestos-protection program: the Navy used asbestos insulation aboard ships and did not begin substituting alternative insulation materials until the early 1970s, with a 1975 policy to remove only damaged insulation and a 1979 modification for selective replacement - spanning the entire asbestos era this hull's service window (1911-1941) falls within.
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-05
- Study period
- 1979 (report); era reviewed spans this hull's service period
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; the review's fieldwork (Long Beach and Norfolk Naval Shipyards, 1970s) post-dates this hull's 1941 loss and it does not address pre-WWI construction directly - supports era context only. Full text not retrieved (gao.gov blocked automated PDF fetch this session, returning HTML); content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-08
-
[10]National Archives and Records Administration, 'Researching Asbestos aboard US Naval Vessel up through 1961' - official research guide to RG 19 (Bureau of Ships) asbestos-relevant series, indexed by hull filing code under the Navy Filing Manual [other_primary]
- Locator
- NARA guided-topic page, 'Bureau of Ships General, Confidential, and Secret Correspondence' and 'Specifications and Standards [Item S-28]' sections
- Finding type
- historical_record
- Finding
- NARA's official research guide establishes the ship-specific asbestos-research pathway: Bureau of Ships (RG 19) correspondence is arranged by Navy Filing Manual code - for this hull, 'YT104' - within series including General Correspondence 1940-1945 (Entries A1 1266-A through -N) and Specification/Standard Development Case Files 1920-1966 (Entry P 45). The guide's covered window, '1941-1961' materiel use, overlaps only this hull's final service year; the filing-code pathway is nonetheless concrete because the 1941 Filing Manual indexes 'YT104 Banaag' as a live hull (ev-uss-banaag-yt104-03). No digitized YT-104 correspondence was located; records are undigitized at College Park.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- context_only
- Accessed
- 2026-10-05
- Study period
- records coverage 1920-1966; hull relevance 1940-1941 window
- Limitations
- Archival pathway documentation, not a hull record - names no vessel and contains no asbestos content for this ship. The guide's collections chiefly cover 1940-1961; this hull's 1910 construction and 1911-1940 records would sit in earlier BuShips/contract series not enumerated here. Lead is unverified against physical records.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-09
-
[11]Batch-9291 search ledger (this record): NHHC DANFS + casualty list + Navy Filing Manual 1941; NavSource; NVR; NARA catalog and asbestos research guide; GAO; PMC2604477; asiaticfleet.com orbat; secondary web sweep; CourtListener via cl-auth-search.py [other_primary]
- Locator
- search_ledger rows sl-uss-banaag-yt104-01 through -13
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, build specification, or material list naming USS Banaag (YT-104) was found in the public sources searched (see search_ledger). The hull was lost to enemy action in December 1941, foreclosing any present-day exposure pathway; no wreck survey or salvage record was located. CourtListener base queries completed 2026-10-05: 'Banaag' opinions returned 8 hits and 'Banaag' dockets 139 (returned page classified) - all Filipino-surname collisions, no vessel litigation; 'YT-104' opinions returned zero; 'YT-104' dockets returned 2 name collisions (a criminal statutory action and a terrorism case). No qualifying asbestos litigation naming this hull located. Secondary web sweeps likewise surfaced no qualifying asbestos litigation and no marketing coverage - 'Banaag' collides only with a Filipino surname.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-05
- Study period
- 2026-10-05
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - era inference supports probable asbestos-containing steam-plant materials, but no ship-specific documentation exists. Deck logs, BuShips correspondence under filing code YT104, and any loss/demolition reports are undigitized archival leads (see NARA row). Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-banaag-yt104-10