Evidence
10 evidence entries recorded; each entry has a stable permalink (#ev-1 … #ev-10).
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[1]research packet 852-packet.md (2 sources cited) [other_primary]
- Finding type
- vessel_history
- Finding
- Identity packet verdict: VERIFIED (allocation)
- Verification
- verified
- Role
- supporting
- Documentation level
- ship_specific
- Evidence ID
- uss-built-in-the-netherlands-as-msi9-pkt-852-packet-md
-
[2]NavSource Online: Mine Warfare Vessel Photo Archive, MSI-9 page — construction timeline, specifications, disposal, namesake caption, and 'no DANFS history' statement (live page verified this session) [other_primary]
- Locator
- NavSource 11/059.htm — Van Straelen Class Inshore Minesweeper block, specifications block, photo caption set (incl. namesake biography caption)
- Finding type
- vessel_history
- Finding
- NavSource documents this hull as 'MSI-9 ... built in The Netherlands', a Van Straelen-class inshore minesweeper: laid down 29 June 1959 under the Mutual Defense Assistance Program; launched 10 May 1960; commissioned HNLMS Chömpff (M 874), 19 December 1960; 'Struck from the Navy Register 1 January 1984'; scrapped in 1988 at Zaandam, Holland. Specifications: displacement 151 t.; length 108.2 ft; beam 21 ft 8 in; draft 5.9 ft; speed 13 kts; complement 13; armament one 20 mm mount; propulsion two 500 hp Stork Werkspoor diesel engines, two shafts. Photo captions document the launch (10 May 1960), being placed in service (19 December 1960), Rhine River service, and the 1988 scrapping at Zaandam, and identify the namesake: Luitenant ter Zee Jan Marie Lodewijk Ignasius Chömpff (21 December 1904 - 19 February 1942), who died when HNLMS Piet Hein was sunk 19 February 1942 at the Battle of Badung Strait, struck by a Long Lance torpedo fired from the Japanese destroyer IJN Asashio, and was posthumously awarded the Military Order of William 4th class. The page states explicitly: 'There is no DANFS history currently available for MSI-9.'
- Verification
- verified
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1988
- Population
- De Noord or Arnhemse SM construction trades (1959-60, yard disputed); Royal Netherlands Navy crew, complement ~13 (1960-1983); Zaandam shipbreakers (1988)
- Limitations
- NavSource is a volunteer-maintained secondary compilation, not a primary registry. Its builder attribution (Arnhemsche scheepsbouwmaatschappij, Arnhem) conflicts with Dutch sources naming De Noord, Alblasserdam — see ev-09 and gaps. 'Navy Register' phrasing for a Royal Netherlands Navy vessel is loose terminology; the 1 January 1984 strike date is corroborated by Onze Marine Vloot ('uit de sterkte afgevoerd'). Contains no asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-01
-
[3]NavSource Online: Motor Mine Sweeper Photo Archive, Inshore Minesweepers (MSI) index — hull-number-to-foreign-vessel mapping (live page verified this session) [other_primary]
- Locator
- NavSource 11/05idx.htm — Inshore Minesweepers (MSI) index, MSI-9 row
- Finding type
- vessel_history
- Finding
- SCOPE CORRECTION: the index documents MSI-9 as 'built in The Netherlands as Chömpff (M 874)' — one of eight sequential MDAP inshore-minesweeper numbers (MSI-3 through MSI-10) built in the Netherlands for the Royal Netherlands Navy. MSI-9 is a U.S. allocated hull number for offshore-procurement construction under the Mutual Defense Assistance Program; the craft was never commissioned in the U.S. Navy and never carried a USS prefix. Secondary lists that style the row 'USS MSI-9' (e.g., the 'List of mine warfare vessels of the United States Navy' mirrored on aggregator sites) apply the USS prefix by list convention, not as a historical fact.
- Verification
- verified
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1960 (MDAP numbering window)
- Limitations
- Corrects the 'USS' framing inherited from secondary list convention; NavSource itself does not style the hull 'USS'. The MSI index is a secondary compilation — the underlying MDAP hull-number assignment is not independently documented here; U.S. hull-number assignment records are an open archival lead.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-02
-
[4]Wikipedia, 'Van Straelen-class minesweeper' (citing van Amstel 1991; Raven 1988; Schoonoord 2012; Woudstra 1982) — class article and ships-in-class table naming this hull (live page verified this session) [other_primary]
- Locator
- Wikipedia Van Straelen-class minesweeper — Design and construction section, Ships in class table (Chömpff M874 row), class overview block
- Finding type
- vessel_history
- Finding
- The class article documents 16 inshore minesweepers designed in the Netherlands and built 1958-1962 at Dutch yards (G. de Vries Lentsch Jr., Amsterdam; De Noord, Alblasserdam; Arnhemse Scheepsbouw Maatschappij, Arnhem); construction cost split between the United States under the Mutual Defense Assistance Program (eight ships) and the Netherlands (eight ships); total class cost ƒ64 million; RNLN service 1960-1962 through 1 March 1983; ships named for Royal Netherlands Navy personnel decorated posthumously with the Military Order of William or Bronze Cross; used for sweeping mines in shallow and narrow inland waters. The ships-in-class table documents this hull: Chömpff, pennant M874, builder De Noord, laid down 29 June 1959, launched 10 May 1960, commissioned 19 December 1960, decommissioned 1983, sold in 1988 in Zaandam. Class characteristics given: 171.3 t, 33.08 m length, 6.87 m beam, 1.80 m draft, two 1,100 hp Werkspoor diesels on two propellers, 13 knots, crew 14, one 20 mm machine gun.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1958-1988
- Population
- RNLN crews across class service 1960-1983
- Limitations
- Secondary encyclopedia used for triangulation against NavSource and Onze Marine Vloot — its citations are to Dutch-language standard references (van Amstel 1991, 'De schepen van de Koninklijke Marine vanaf 1945'; Raven 1988; Schoonoord 2012). Its builder attribution (De Noord) conflicts with NavSource (Arnhemse SM). Specification figures differ from NavSource on displacement (171.3 t vs 151 t — reconciled by worldnavalships.com as standard vs full load) and complement (14 vs 13). No asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-03
-
[5]Onze Marine Vloot (Dutch naval vessel reference compilation), Hr.Ms. Chömpff page — build data, namesake, strike date, disposal sale (live page verified this session) [other_primary]
- Locator
- onzemarinevloot.weebly.com — Hr.Ms. Chömpff vessel record block (Bouwwerf / op stapel gezet / te water gelaten / in dienst gesteld / naamsein fields)
- Finding type
- vessel_history
- Finding
- Dutch-language vessel record documents: builder De Noord te Alblasserdam; laid down 29 June 1959; launched 10 May 1960; placed in service 19 December 1960; pennant M 874; named after Ltz.1 J.M.J.I. Chömpff, commanding officer of the torpedo boat destroyer Hr.Ms. Piet Hein, who died with that ship on 19 February 1942 in the Battle of Badung Strait and was posthumously appointed Knight 4th class of the Military Order of William; 'Het schip werd voor Amerikaanse rekening gebouwd' (the ship was built for American account); struck from the fleet strength 1 January 1984; sold 25 June 1988 together with Hr.Ms. Fret in a single purchase for ƒ134,200 for scrapping at Zaandam.
- Verification
- partial
- Role
- context
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1988
- Population
- De Noord construction trades (1959-60); RNLN crew (1960-1984); Zaandam scrapping yard (1988)
- Limitations
- Volunteer-maintained Dutch secondary compilation; milestone dates and the strike date agree with NavSource and the Wikipedia class table, and the disposal detail (joint sale with Fret, price, date) is unique to this source. The 'built for American account' phrasing corroborates MDAP funding independently of the MSI index. No asbestos or material content.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-04
-
[6]Nationaal Archief (Dutch National Archives), inventaris 2.12.03 'Scheepsjournalen van het Ministerie van Marine, 1813-1995' — inventory listing ship's journals for Hr.Ms. Chompff (live page verified this session) [other_primary]
- Locator
- Nationaal Archief inventaris 2.12.03, invnr/7445 section — Hr.Ms. Chompff journal entries (22-09-1966 to 09-06-1978 run per archive search listing)
- Finding type
- historical_record
- Finding
- The Dutch National Archives inventory of Royal Netherlands Navy ship's journals lists surviving journal runs for Hr.Ms. Chompff; the National Archives search listing shows a run covering 22 September 1966 - 9 June 1978, availability physical (reading-room access). This is the extant official log record for the hull's operational period.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1966-1978
- Population
- RNLN crew, 1966-1978 journal window
- Limitations
- Archival lead only: inventory listing verified live; journal contents are not digitized and were not examined. A ship's journal documents movements and events, not installed materials — no asbestos claim attaches; it is the closest thing to a ship-specific primary record located.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-05
-
[7]Nationaal Archief (Dutch National Archives), inventaris 4.MST 'Bouwtekeningen van schepen van de Nederlandse Marine, 1683-1996' — construction-drawings inventory covering the Van Straelen class including Chompff (live page verified this session) [other_primary]
- Locator
- Nationaal Archief inventaris 4.MST, section 4020-4033 / invnr 4031 — Ondiepwater-mijnenvegers, Van Straelen-klasse list
- Finding type
- historical_record
- Finding
- The National Archives inventory of Dutch Navy ship construction drawings lists the Van Straelen class under 'Ondiepwater-mijnenvegers' (inshore minesweepers): Alblas, Bussemaker, Lacomblé, Van Hamel, Van Straelen, Van Moppes, Chompff, Van Well Groeneveld, Schuiling, Van Versendaal, Van der Wel, Van 't Hoff, Mahu, Staverman, Houtepen and Zomer. Surviving construction drawings for this hull are the authoritative lead for resolving the builder conflict (De Noord vs Arnhemse SM) and would document installed materials and insulation if examined.
- Verification
- partial
- Role
- archival_lead
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1960
- Population
- De Noord / Arnhemse SM construction trades (1959-60)
- Limitations
- Archival lead only: the inventory section verified live; drawing contents not examined and not digitized for online retrieval. Whether the drawings carry insulation/material schedules is unknown until pulled.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-06
-
[8]GAO, Navy Efforts To Protect Workers From Asbestos Exposure, HRD-80-2 (Oct 18, 1979) — product page [gao]
- Locator
- GAO product page HRD-80-2 (full text not retrieved; gao.gov returns HTTP 403 to automated fetch)
- Finding type
- gov_survey
- Finding
- GAO documented that the U.S. Navy used asbestos insulation extensively aboard ships and did not begin substituting alternative insulation materials until the early 1970s — the documented asbestos era for U.S. naval construction overlaps this hull's 1959-60 Dutch build window.
- Verification
- verified
- Role
- context
- Documentation level
- context_only
- Accessed
- 2026-10-03
- Study period
- 1979
- Population
- U.S. Navy shipyard workers (documented); NOT this hull's population
- Limitations
- Program-level U.S. Navy documentation carried for era context only; it does not reach this hull — the MSI-9 craft was Dutch-designed, Dutch-built, and Dutch-operated, outside U.S. Navy construction, crewing, and occupational-health documentation channels. No equivalent Dutch or MDAP-era asbestos documentation for foreign offshore-procurement construction was located.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-07
-
[9]Batch-7591 search ledger (this record): NavSource MSI-9 page and MSI index; Wikipedia Van Straelen-class article; Onze Marine Vloot Chömpff page; Nationaal Archief 2.12.03 and 4.MST inventories; NVR probe; GAO product page; CourtListener (blocked); secondary web litigation sweep [other_primary]
- Locator
- search_ledger rows sl-uss-built-in-the-netherlands-as-msi9-01 through -11
- Finding type
- historical_record
- Finding
- No asbestos record located for this hull at any level: no ship-specific asbestos survey, abatement record, or hazmat disclosure; no class-level asbestos documentation for the Van Straelen class; no builder-yard asbestos record for De Noord or Arnhemse Scheepsbouw Maatschappij; and no litigation naming MSI-9 or Chömpff surfaced in secondary web sweeps. NavSource states no DANFS entry exists for MSI-9; the Naval Vessel Register has no detail page (the hull was never in U.S. service and was disposed before the NVR's coverage window); U.S. program-level asbestos documentation (GAO HRD-80-2, NIOSH yard surveys) does not extend to foreign-built offshore-procurement MDAP hulls operated by foreign navies. CAVEAT: CourtListener could not be queried this session — the authenticated helper returned daily-quota exhaustion (~5 h to reset); logged blocked in search_ledger, not a negative result.
- Verification
- verified
- Role
- negative_finding
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 2026-10-03
- Limitations
- Absence of a located public record does not prove absence of asbestos aboard. The litigation repository is an open gap (throttled, not run). The strongest remaining leads are Dutch-side and undigitized: Nationaal Archief ship's journals (2.12.03) and construction drawings (4.MST), plus any Dutch Ministry of Defence material records. Does not establish or defeat any claim of exposure or legal eligibility.
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-08
-
[10]Builder-attribution cross-check: NavSource MSI-9 page (Arnhemsche scheepsbouwmaatschappij, Arnhem) vs Wikipedia Van Straelen-class ships table and Onze Marine Vloot (both De Noord, Alblasserdam) [other_primary]
- Locator
- NavSource 11/059.htm construction line vs Wikipedia ships-in-class table (Chömpff M874) and onzemarinevloot.weebly.com Bouwwerf field
- Finding type
- historical_record
- Finding
- CONFLICT FLAGGED: NavSource attributes this hull's construction to Arnhemsche scheepsbouwmaatschappij, Arnhem; the two Dutch-side sources — the Wikipedia class table (citing van Amstel 1991, Raven 1988, Schoonoord 2012) and Onze Marine Vloot — attribute De Noord, Alblasserdam. Laid-down (29 June 1959), launch (10 May 1960), and commissioning (19 December 1960) dates are identical across all three sources, confirming one hull with conflicting yard attribution. De Noord is carried as the better-attested value; NavSource may have transposed the yard line from MSI-10 (Van Well Groeneveld, built by Arnhemse SM per NavSource's own MSI-10 page).
- Verification
- disputed
- Role
- correction
- Documentation level
- ship_specific
- Accessed
- 2026-10-03
- Study period
- 1959-1960
- Limitations
- Conflict between secondary sources, unresolved against a primary record. The Nationaal Archief 4.MST construction drawings for Chompff are the resolution lead. Spec figures also conflict across sources (displacement 151 t vs 171 t — reconciled as standard vs full load by worldnavalships.com; complement 12-14; engine rating 500 hp each vs 1,100 hp total).
- Atlas source
- true
- Evidence ID
- ev-uss-built-in-the-netherlands-as-msi9-09