15 January 2014 N. de Hilster, Vessel Geometry and Calibrations: a historical perspective 1/17

N. de Hilster

HSB Workshop Vessel Geometry and Calibrations15 January 2014

Vessel Geometry and Calibrations:a historical perspective

15 January 2014 2/17

Positional accuracy ~ 1 metre2D Vessel GeometryMRU only for heaveTape measurements

1980s

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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February 1953: WatersnoodrampFlooding large parts of Zuid-Holland, Zeeland and Noord-Brabant

Also affected Great Britain, Belgium and Germany

Some 2400 casualties around and on the North Sea

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Two major projects:

Great Britain: Thames BarrierThe Netherlands: Delta Works

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying the Storm Surge BarrierTide reduction not possibleFirst 3D dynamic positioning system: the AGA/Minilir

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying survey vesselsFirst surveyed hydrographic vessels:

mv. Scholekstermv. Houtvliet

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying survey vesselsmv. Scholekster

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying vesselsDelta works construction vessels

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying survey vessels1989: First multibeam vessel:

mv. Christaan Brunings (EM100)

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying vessels: equipment1990s: Introduction of KART2000: Introduction of PHINS2001: Introduction of LRK

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying vessels: LiteratureJ.J. Knol, “Maatvoering aan onder helling

opgestelde objekten en op drijvende platforms”, 1982

A.C.D.O. de Wulf, G.J.K. Brouns, “Geometrische kalibratie van een peilschip”, parts I and II, 2002

J.E. Hughes Clarke, “A reassessment of vessel coordinate systems: what is it that we are really aligning?”, 2003

N. de Hilster, “The MRU and SRF aligned”, parts I, II and III, 2008/2009

J. Vint, “Dynamic Calibration of Navigation Sensors Using GNSS Technology”, 2013

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying vessels: Early NamesScholekster by F. Maas and H. van der Marel, after 1988 by A.P.M. Pieters

Houtvliet by H. Murre and an assistant, after 1988 by A.P.M. Pieters

Christaan Brunings by A.P.M. Pieters in 1989

From 1989 on: A.P.M. Pieters and various assistants

1998: N. de Hilster and E.B. Wiegmann take over from A.P.M. Pieters

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying floating objects: FirmsPasse Partout: J.J. Knol(managing director)

GeoW: H. Waanders(former Delta Works surveyor)

Geocon: M. van der Bosch(tunneling)

SimtechDelta Surveys

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Surveying vessels: InstrumentsInitially tape measuresDelta works: Wild T2, tape measures1989: total station (AGA 140, TC1)2004: photogrammetry

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective

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Surveying vessels: AccuracyTape measures: 10-50 cm (only X/Y)Deltaworks (1980s): app. 1-2 cm1998: Move3 modified and implemented: 2-3 mm

2004: 1:20000 (1mm/20m)Now: 1:40000 (1mm/40m)

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Do we need that accuracy?Better comparisonProject requirementsCost reductionImproves performance of LRK/INSHigher accuracy: better calibrations

Aligning the MRU with the SRFPitch/roll alignment accuracy: 0.02°

Aligning a PHINS (0.02xSEC(LAT)°) 3 axis alignment accuracy: <=0.03°

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ConclusionStarted at the Delta WorksKept pace with project requirements and sensor accuracies

Job for specialists

N. de Hilster, Vessel Geometry and Calibrations: a historical perspective