HYSWEEPHYSWEEP®® Overview Overview

HYSWEEPHYSWEEP®® Overview Overview

S/V Bufe - USACE Sault Ste. Marie S/V Bufe - USACE Sault Ste. Marie Area OfficeArea Office

Full Coverage Survey of a DC3.Full Coverage Survey of a DC3.

Multibeam vs. Single BeamMultibeam vs. Single BeamThe Good:

Saves time: Multibeam provides high resolution and full coverage of the seafloor. The data is more accurate for volume computations.

The Bad:•More data to work with and more time to process. With additional sensors needed, there are more error sources.

Example of using a Example of using a Multibeam where previous Multibeam where previous work was with single beam work was with single beam sonar. An Obstruction was sonar. An Obstruction was easily missedeasily missed

The Ugly: The Ugly:

Plane is lost entirely in single beam contours.Plane is lost entirely in single beam contours.

Multibeam Sonar TypesMultibeam Sonar TypesBeamforming Systems:Beamforming Systems:•Forms beams using an Forms beams using an array of transducer array of transducer elementselements..

•Each beam has a Maximum Response Angle, Each beam has a Maximum Response Angle, giving the direction of the beam.giving the direction of the beam.

Interferometric Systems:Interferometric Systems:•AKA bathymetric sidescan. Forms AKA bathymetric sidescan. Forms beams from phase angle of beams from phase angle of backscatter.backscatter.

Multiple Transducer Systems:Multiple Transducer Systems:•Widely spaced transducers pointing down.Widely spaced transducers pointing down.

Seabat 8101

Atlas Fansweep 20

Ross Sweep System

Support SensorsSupport Sensors

Motion reference (MRU):Motion reference (MRU):•Measures boat heave, pitch and roll.Measures boat heave, pitch and roll.

Heading:Heading:•Using a gyro or dual GPS antenna array. Using a gyro or dual GPS antenna array.

Sound Speed Sensor & Sound Speed Sensor & Profiler:Profiler:•Sensor:Sensor: Sound speed at sonar Sound speed at sonar head.head.

•Profiler:Profiler: Sound speed through Sound speed through water column.water column.

HYSWEEPHYSWEEP®® MB Interfaces MB Interfaces

•Atlas: Bomasweep, Fansweep, Hydrosweep MD2, MD/30, MD/50, DS.

•Benthos: C3D.

•BlueView: MB2250/1350.

•EdgeTech: 4600.

•Furuno: HS Series.

•GeoAcoustics: GeoSwath.

•Imagenex: Delta T, DT100, Dual Delta T

•ISTech

•Kongsberg: MS1000, M3

•Klein: 5000

•Odom: ES3, Dual ES3, Echoscan II, Miniscan, MB1 (dual).

•R2Sonic: SONIC 2020, 2022, 2024.

•Reson: Seabat 71xx, 81xx, 900x.

•Ross: Smart Sweep.

•SEA: SWATHplus.

•Seabeam: 2100, 1000 Series, 3000 Series.

•Simrad (Kongsberg): EM 302, 710, 1002, 2000, 2040, 3000, 3002, 3002 Dual Head, SM2000.

•Tritech: SeaKing.

•WASSP: Multibeam sonar.

Multibeam Sonars Available in HYSWEEPMultibeam Sonars Available in HYSWEEP®®::

At last count, 50 different multibeam and multiple transducer systems are supported.

HYSWEEPHYSWEEP®® Topographic Lasers Topographic Lasers

•MDL: DynascanMDL: Dynascan

•Optech: ILRISOptech: ILRIS

•REIGL: LMS and V REIGL: LMS and V SeriesSeries

Laser Scanners:Laser Scanners:

REIGL V-Series Optech ILRISMDL Dynascan

HYSWEEPHYSWEEP®® Driver Reference Driver Reference

•Applanix: POS/MV, WaveMaster.

•Coda Octopus: F180.

•IXSEA: OCTANS.

•JAE: JM7531.

•KVH: Gyrotrac.

•Novatel: SPAN

•Odim: MVP (Moving Velocity Profiler - HYPACK Survey driver).

•Seatex: MRUx.

•SG Brown: 1000S.

•TSS: 335B, DMS.

• *** - Other sensors available via the generic and NMEA drivers.

Motion / Heading / Other Sensors:Motion / Heading / Other Sensors:

InstallationInstallation

Motion Sensor:Motion Sensor:•Mount at boat CG. Alternate location: As close as possible to boat CG.Mount at boat CG. Alternate location: As close as possible to boat CG.

Sonar mounting (in order of preference):Sonar mounting (in order of preference):•Hull mount at boat CG. Hull mount at boat CG.

•Moon pool at boat CG.Moon pool at boat CG.

•Pole mount; bow or over the side.Pole mount; bow or over the side.

Moon PoolMoon Pool Pole Mount: BowPole Mount: Bow Pole Mount: Over the SidePole Mount: Over the Side

Calibration ToolsCalibration Tools

HYSWEEP® Patch TestHYSWEEP® Patch Test•Pitch, roll and yaw alignment. Find Pitch, roll and yaw alignment. Find out EXACTLY where the sonar is out EXACTLY where the sonar is pointing.pointing.

•Account for GPS latency if needed.Account for GPS latency if needed.

HYSWEEP® Bar CheckHYSWEEP® Bar Check•Much like single beam - verify Much like single beam - verify draft measurement.draft measurement.

Multibeam systems need calibration!Multibeam systems need calibration!

Why we need to patch test. Bar check window.

Survey PreparationSurvey PreparationPlanned Survey LinesPlanned Survey Lines•Make parallel lines spaced for target Make parallel lines spaced for target coverage.coverage.

•Sometimes difficult with multibeam - Sometimes difficult with multibeam - coverage changes with depth.coverage changes with depth.

Coverage MatrixCoverage Matrix•Alternative to planned Alternative to planned lines.lines.

•““Paint the Bottom”Paint the Bottom” until there are no gaps.until there are no gaps.

Large depth changes make line planning difficult. Alternative is “Painting the Bottom”.

HYSWEEPHYSWEEP®® Survey SurveyFeaturesFeatures

•Data collection and logging. Targeting Data collection and logging. Targeting and coverage mapping. TPU and other and coverage mapping. TPU and other QC checks visible in 16 real time dislaysQC checks visible in 16 real time dislays

Refraction Errors seen in real timeRefraction Errors seen in real time•Refraction occurs at changes in sound velocity.Refraction occurs at changes in sound velocity.

•Errors when SV profile doesn’t match conditions Errors when SV profile doesn’t match conditions – estuaries can be troublesome.– estuaries can be troublesome.

•Look for smiling or frowning sweeps.Look for smiling or frowning sweeps.Same take-off angle, different ray paths.

HYSWEEP® 3-D Seafloor

You don’t want to see this profile when the bottom is flat.

Multibeam Post ProcessingMultibeam Post ProcessingIn HYSWEEPIn HYSWEEP®®

•Corrections / Review / Edit with Corrections / Review / Edit with MBMAX32 or MBMAX64MBMAX32 or MBMAX64 editors.editors.

Tide and sound speed Tide and sound speed corrections. corrections.

Graphical data review.Graphical data review.

Manual and automatic Manual and automatic data cleaning.data cleaning.

•Automated data cleaning with Automated data cleaning with CUBECUBE..

Sweep editing window.

After MBMAX, Back Into HYPACKAfter MBMAX, Back Into HYPACK®®

•Sounding Selection: Sounding Selection: MAPPERMAPPER gridding program and gridding program and DATA REDUCTION DATA REDUCTION program to program to minimize number of XYZ points.minimize number of XYZ points.

•Modeling, volumes, sections, contours with HYPACKModeling, volumes, sections, contours with HYPACK®® TIN MODELTIN MODEL..

•Editing and viewing with Editing and viewing with CLOUDCLOUD

•Visualization and fly through with HYPACKVisualization and fly through with HYPACK®® 3DTV3DTV..