Evidence
4 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-4).
-
[1]National Archives, Ship Plan Index, HOMBRO entries [other_primary]
- Locator
- HOMBRO rows: YTB-506, RG 19 microfilm NAID 175669393; YTM-769, RG 19 hull-series drawings NAID 153716524
- Finding type
- vessel_history
- Finding
- NARA's Ship Plan Index has entries for HOMBRO under YTB-506 and YTM-769. The later designation is treated as an alias for this record rather than a second vessel.
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The index lists names and designations, not service dates, builder, machinery, crew, asbestos materials, or an explicit redesignation order. Identity across designations is supported by the matching name and known sequence, but the underlying drawings have not been inspected.
- Atlas source
- true
- Evidence ID
- ev-uss-hombro-ytb506-01
-
[2]National Archives, Researching Asbestos aboard US Naval Vessel up through 1961; Ship Plan Index [other_primary]
- Locator
- Cartographic Branch section, S39/S48 guidance; Ship Plan Index HOMBRO rows
- Finding type
- historical_record
- Finding
- NARA identifies RG 19 ship engineering drawings and microfilm as central sources for investigating asbestos on a particular Navy vessel. It directs researchers to S39 insulation and lagging and sometimes S48 piping drawings; Hombro has indexed records in both drawing series.
- Verification
- verified
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- The guide explains how to investigate vessel materials; neither it nor the index establishes that Hombro's particular drawings contain an S39 or S48 sheet or mention asbestos. Drawings themselves were not obtained.
- Atlas source
- true
- Evidence ID
- ev-uss-hombro-ytb506-02
-
[3]NAVSEA, NSTM Chapter 050, Readiness and Care of Inactive Ships (2005) [other_primary]
- Locator
- Section 050-7.2.7, Handling and Removal of Asbestos Materials
- Finding type
- asbestos_application
- Finding
- A Navy technical manual states that past naval shipbuilding programs used asbestos materials for shipboard thermal insulation and deck tile, and addresses asbestos in inactive ships and craft.
- Verification
- verified
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-09-24
- Limitations
- Program-level historical statement. The manual does not identify Hombro, her tug class, a construction date, a product aboard her, or any individual exposure. It must not be used as proof of asbestos on this vessel.
- Atlas source
- true
- Evidence ID
- ev-uss-hombro-ytb506-03
-
[4]Batch 9424 source search ledger, linked official repositories [other_primary]
- Locator
- search_ledger rows sl-uss-hombro-ytb506-01 through sl-uss-hombro-ytb506-05
- Finding type
- historical_record
- Finding
- No ship-specific asbestos survey, insulation specification, abatement record, or product identification for Hombro was located in the reviewed NARA index and guide, NAVSEA manual, GAO report summary, or NHHC web search.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-09-24
- Limitations
- A search result, not proof that the vessel lacked asbestos. The NARA drawings are cataloged but have not been inspected; CourtListener searching is separately tracked and is not included in this negative finding.
- Atlas source
- true
- Evidence ID
- ev-uss-hombro-ytb506-04