Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
-
[1]research packet crew-cy-packet.md (3 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-ata-170-ata170-pkt-crew-cy-packet-md
-
[2]NavSource Online: Service Ship Photo Archive, USS ATA-170 ex-USS ATR-97 (09/38/38170) - designation timeline, specifications, campaign table, awards, commanding officer, disposal [other_primary]
- Locator
- NavSource 09/38/38170.htm header block, awards/campaign table, specifications block, commanding-officers list (page last updated 15 May 2020; verified live 2026-10-06)
- Finding type
- vessel_history
- Finding
- NavSource record for this hull: Sotoyomo Class Auxiliary Fleet Tug; planned and approved as Fleet Tug AT-170; laid down 9 April 1943 as Rescue Ocean Tug ATR-97 at Gulfport Boiler & Welding, Port Arthur, TX; launched 21 August 1943; commissioned USS ATR-97 7 December 1943, LT. Walter C. Beatie Jr., USNR, in command; reclassified Auxiliary Fleet Tug ATA-170 15 May 1944. WWII service assigned to the Europe-Africa-Middle East Theater with campaigns: Invasion of Normandy 6-25 June 1944 and Invasion of Southern France 15 August-25 September 1944; 'USS ATA-170 earned two battle stars for World War II service.' Awards row: American Campaign Medal, Europe-Africa-Middle East Campaign Medal (2), World War II Victory Medal. Decommissioned - 'date unknown'; struck from the Naval Register - 'date unknown'; sold in 1947 to the government of Greece, renamed Leon; final disposition - broken up at Kynosoura, Greece in 1990. Specifications: 835 t.(lt) / 1,360 t.(fl); 143' x 33'10" x 13'2"; 12 kts; one 3"/50 DP mount, two single 20mm AA; boom capacity 4 t.; complement 5 officers + 40 enlisted; fuel 1,200 Bbls diesel; propulsion two GM 12-278A diesel-electric engines, single Fairbanks Morse main reduction gear, single propeller, 1,200 shp. Call sign NKKZ.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1943-1990
- Population
- Construction trades (Gulfport Boiler & Welding, Port Arthur, 1943); wartime crew (1943-1947); Greek crew (1947-1990); shipbreakers, Kynosoura (1990)
- Limitations
- NavSource is a volunteer secondary compilation, not a primary registry - its milestone dates generally track official lists but it is the most complete single source for this hull because no DANFS entry exists. Contains no asbestos content. The 1990 breakup predates modern ACM-handling regulation but no hazmat or material record for the scrapping was located.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-01
-
[3]HyperWar: 'US Navy Tugs, 1940-45' (ibiblio transcription of the official U.S. Navy tug list) - ATA and ATR sections [other_primary]
- Locator
- ships-at.html ATA table row 'ATA-170' and ATR table row 'ATR-97' (verified live 2026-10-06)
- Finding type
- vessel_history
- Finding
- Official-list lineage confirms this is one hull, not two: ATA table row - 'ATA-170 | | 1944 | Reclassified from Ocean Tug, Old ATR-97'; ATR table row - 'ATR-97 | | 1943-44 / 1944 | Reclassified as Auxiliary Tug ATA-170.'
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1943-1944
- Limitations
- Confirms the designation lineage only - no dates beyond year, no asbestos or material content. HyperWar is a transcription mirror of an official Navy publication; the underlying list itself is authoritative.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-02
-
[4]shipbuildinghistory.com, Gulfport Shipbuilding / Gulfport Boiler & Welding (Port Arthur TX) hull table - hull 224 [other_primary]
- Locator
- gulfport.htm hull table rows 224-227 (verified live 2026-10-06)
- Finding type
- vessel_history
- Finding
- Builder-yard production table corroborates construction and disposal: yard hull 224, 'ATR 97 / ATA 170', owner US Navy, type Tug, 835d (displacement), launched 21-Aug-43, fate 'To Greece 1947 as Leon, scrapped 1990.' Same table lists the three same-yard sister tugs at consecutive hull numbers: 225 ATR 98 / ATA 171 ('Lost off the Azores 1944'), 226 ATR 99 / ATA 172 ('To Panama CC 1947 as Taboga'), 227 ATR 100 / ATA 173.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1943; 1947; 1990
- Population
- Construction trades (Gulfport yard, Port Arthur, 1943)
- Limitations
- shipbuildinghistory.com is a specialist secondary compilation of shipyard production records (T. Colton), not an official registry - used here for corroboration of the NavSource/build timeline and yard-hull identity; no asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-03
-
[5]thamestugs.co.uk, 'US Army and US Navy Tugs [1]' Mulberry Harbour tug log - ATA-170 entry [other_primary]
- Locator
- MULBERRY-TUGS-[US][1].php, entry 'ATA-170 [ex ATR-97]' (verified live 2026-10-06)
- Finding type
- vessel_history
- Finding
- Mulberry-harbour operational log for this hull: 'ATA-170 [ex ATR-97]. US Navy tug. Allocated to SNO Selsey to tow Phoenix and Whale units. Built 1943 by Gulfport Boiler and Welding Co., Port Arthur, Texas. YN224. ... 1500shp 2x General Motors 12-278A Diesel engine/electric drive. Single screw. 12 knots. Complement 45. Armament 1x3" DP. 2x20mm AA. Callsign NKKZ. 9-4-1943 Laid down. 21-8-1943 Launched. 7-12-1943 Delivered to US Navy as ATR-97. 1944 Reclassified as ATA-170. 16-6-1944 22.15 Arrived Mulberry A towing Phoenix unit 64/A2. 22.30 Released. 1947 Deleted from Navy List. 1947 Sold to Government of Greece, renamed Leon. 5-1990 Scrapped at Kynosoura, Greece.' Places the hull concretely at Normandy towing Mulberry Phoenix caisson unit 64/A2 on the night of 16 June 1944 - the tug-level component of Operation Overlord's artificial-harbour deployment.
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1943-1990; tow detail 1944-06-16
- Population
- Wartime crew during Normandy towing operations (June 1944)
- Limitations
- Specialist secondary compilation (thamestugs.co.uk Mulberry tug pages, last updated 29-3-2013) reproducing log-format movement entries - not an official registry; the minute-level 16-6-1944 tow detail is consistent with the campaign-credit window but not independently verified against the unit movement logs it presumably derives from. Dimension variants vs NavSource (L165'6" B33'4" 534grt 1500shp vs 143' B33'10" 1200shp) noted in gaps. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-04
-
[6]NARA RG 80-G photo 80-G-222590 - USS ATR-97 under way near Norfolk, VA, 11 March 1944 (identifier transcribed from NavSource caption, credited 'US National Archives, RG-80-G' via Shipscribe.com); plus undigitized leads: RG 38 WWII war diaries and RG 24 deck logs for ATR-97 / ATA-170 [other_primary]
- Locator
- NARA RG 80-G photo 80-G-222590 (identifier via NavSource 09/38/38170.htm caption); catalog.archives.gov unverified (JS-rendered)
- Finding type
- historical_record
- Finding
- A NARA-held Bureau of Aeronautics blimp photograph (stationed at Weeksville, NC) documents this hull as USS ATR-97 under way near Norfolk, VA, on 11 March 1944 - her pre-reclassification shakedown/working-up period on the Atlantic coast before the Normandy deployment. The identifier chain (RG 80-G, photo 80-G-222590) is transcribed from the NavSource caption crediting the National Archives via Shipscribe.com. Open leads: WWII war diaries (RG 38) and deck logs (RG 24) for ATR-97 / ATA-170, and any Greek-service disposal documentation - none digitized or independently retrieved this session.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1944-03-11
- Population
- Crew during Atlantic-coast working-up (March 1944)
- Limitations
- Archival lead only: the photo establishes physical presence near Norfolk in March 1944, not any work record; catalog.archives.gov is JS-rendered and the photo record could not be independently fetched this session - identifier transcribed via NavSource caption. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-05
-
[7]Era inference built on: NavSource specifications (2 x GM 12-278A diesel-electric, single screw, no steam plant); thamestugs spec block (2 x GM 12-278A diesel/electric drive); GAO HRD-80-2 Navy-wide asbestos-use documentation (see ev-07); WWII-era shipbuilding asbestos documentation (Corn & Starr, AJIM 1987, doi.org/10.1002/ajim.4700110311) [other_primary]
- Locator
- NavSource + thamestugs specification blocks; GAO HRD-80-2 product page; AJIM 11(3):359-373
- Finding type
- asbestos_application
- Finding
- A diesel-electric auxiliary ocean tug built in 1943 to wartime Navy specification sits inside the documented Navy asbestos-insulation era; era-standard applications aboard a vessel of this type and period were thermal insulation, machinery and diesel-exhaust lagging, gaskets, valve packing, and electrical insulation. As a diesel-electric vessel she carried no steam plant - the boiler/turbine lagging pathway of steam vessels does not apply.
- Verification
- inferred
- Role
- supporting
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Study period
- 1943-1990
- Population
- Construction trades (Gulfport yard, 1943); wartime crew (1943-47); Greek crew (1947-90); shipbreakers, Kynosoura (1990)
- Limitations
- Class/era inference only - no hull-specific insulation survey, material list, or work package located for ATR-97 / ATA-170. Names era-standard applications, not confirmed installed materials. No quantity. Product names are normalized era terms; no manufacturer attribution for this hull.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-06
-
[8]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, HTTP 403)
- Finding type
- gov_survey
- Finding
- GAO documented that the Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s - spanning this hull's entire construction (1943) and U.S. service era (1943-47).
- Verification
- verified
- Role
- context
- Documentation level
- class_or_era
- Accessed
- 2026-10-06
- Study period
- 1979
- Population
- Navy shipyard workers; asbestos program review
- Limitations
- Program-level documentation; supports era context only, not any fact specific to this hull. Full text not retrieved (gao.gov blocks automated fetch, HTTP 403, confirmed in prior batches) - content via product-page description.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-07
-
[9]Batch-2845 search ledger (this record): NavSource; HyperWar US Navy Tugs 1940-45 list; shipbuildinghistory.com Gulfport yard table; thamestugs.co.uk Mulberry log; NHHC DANFS index + site search; Naval Vessel Register; Wikipedia; NARA catalog; CourtListener base queries; secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-ata-170-01 through sl-uss-ata-170-12
- Finding type
- historical_record
- Finding
- No qualifying ship-specific asbestos record located: no asbestos survey, abatement contract, hazmat disclosure, museum record, or verified litigation naming ATR-97 / ATA-170 / Leon was found in the public sources searched. There is no DANFS history for this hull (NavSource states this explicitly; site:history.navy.mil search and hazegray DANFS index check returned nothing; no Wikipedia article exists). The Naval Vessel Register carries no entry (disposed 1947 - predates NVR coverage). CourtListener base queries (exact-name opinion + docket, hull-number opinion + docket) returned no qualifying asbestos litigation - see search_ledger for exact queries and results.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 2026-10-06
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard - a 1943 Navy auxiliary with a 47-year service life under two flags is era-consistent with retained asbestos-containing materials, and the 1990 Greek breakup predates modern ACM documentation practice. Deck logs, war diaries, and any Greek-registry disposal records are undigitized leads. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-08
-
[10]Designation cross-check: NavSource designation line (ATR-97 -> ATA-170); HyperWar official-list transcription (ATA-170 reclassified from ATR-97; ATR-97 reclassified as ATA-170); shipbuildinghistory yard table ('ATR 97 / ATA 170' single hull 224); thamestugs ('ATA-170 [ex ATR-97]') [other_primary]
- Locator
- NavSource 09/38/38170.htm header; ships-at.html ATA/ATR rows; gulfport.htm hull 224; MULBERRY-TUGS entry
- Finding type
- historical_record
- Finding
- CORRECTION (pre-emptive): ATR-97 and ATA-170 are the same hull, not two ships. Four independent compilations agree on a single lineage: laid down as Rescue Ocean Tug ATR-97, commissioned USS ATR-97 7 December 1943, reclassified Auxiliary Fleet Tug ATA-170 15 May 1944 - a re-designation, not a second vessel. Searches and records must therefore treat 'ATR-97', 'ATA-170', and the Greek 'Leon' as one hull's successive identifiers.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-06
- Study period
- 1943-1944 (designation window)
- Limitations
- Corrects a lookup error, not a material claim. The reclassification date itself (15 May 1944) rests on NavSource; the official list confirms year 1944 only. No asbestos content.
- Atlas source
- true
- Evidence ID
- ev-uss-ata-170-09