Multibeam Echosounders

GeoSwath 4 250 kHz

GeoSwath 4 offers the industry’s most efficient simultaneous swath bathymetry and side scan seabed map-ping system for shallow waters. Bathymetry data accuracies have been shown to exceed the IHO Standards for Hydrographic Surveys, while providing seafloor coverage of up to 12 times the water depth and data from nadir to the waterline.

GeoAcoustics Ltd

Great Yarmouth, GB

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Description

The specifically developed GS4 acquisition and processing software included with the system delivers automatically cleaned data in real time.

System Components

The GeoSwath 4 turn-key solution comprises a compact dual transducer head as standard with versatile mounting options. The newly developed deck unit contains the complete sonar electronics together with a high spec PC, running the new GS4 software. This provides full acquisition, calibration and data processing capabilities for producing the final bathymetry map and side scan mosaic. All customary ancillary sensors can be directly interfaced.

Dual sonar head

The transducers are available in a choice of three frequencies: 125, 250, 500 kHz, varying in depth performance and data resolution depending on the survey task. A wide range of motion reference units (MRU) and sound velocity sensors (SVS) can be mounted on the compact head. This has been designed for easy deployment on a supplied pole for over-the side or bow-mount options. Alternatively the transducers can be deployed on bespoke boat hull installations. as well as USV assemblies.

Deck Unit

The workstation contains the complete system electronics. It has been newly designed for increased performance in a more compact housing. It offers twice the data density compared to its previous versions and increased nadir performance. All peripheral sensors (position, motion, heading, transducer face sound velocity, sound velocity profiler and tide) are interfaced directly.

GS4 Software

The GS4 software has been specifically designed for the new GeoSwath 4. It is included with the system and provides a complete project based solution; acquisition, storing and editing of sonar and ancillary data, grid-based patch test calibration, data processing, advanced bathymetry data gridding, side scan mosaicing and 3D data visualisation. Newly developed filter algorithms provide real time processed data with minimum user intervention even in difficult survey situations involving vertical structures, shipwrecks and steep seabed slopes.

***News Flash***

GS4 software v1.0.25 is ready for general release soon

The update introduces a new Artificial Intelligence-powered data processing for GeoSwath users, which has already been trialed by selected end-users globally.

The system improves in-survey operational agility and decision support by providing a high-quality real-time data stream on board while cutting the time to final product in post-processing.

Other new functionality with this update includes Survey Accuracy verification, and an Auto mode for side scan data processing. A full change log is available on request.

The GS4 v1.0.25 software update is available free of charge¹ via micro-SD card for customers already using GS4 v1.0.24.

Contact your local dealer or email [email protected] for more information.

¹Cost of physical media, logistics and support may be applicable.

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Specifications

Physical properties of transducer head: Length [m]

0.36

Width [m]

0.352

Height [m]

0.15

Min. external power [V]

110

Max. external power [V]

240

Max. power consumption [W]

250

Transducer Head Weight, appr. including peripherals

20 kg

Speed of sound: Real-time correction of refraction at transducer head

Y

Real-time integration of SV-profile

N

Explanation of SV-profile application process

SVP can be imported as file and applied

Interfaces: Compatible software

All standard processing packages including QPS Qinsy and Hypack (real time) and Caris HIPS and SIPS; IVS3D Fledermaus

Compatible hardware

Any standard

Real-time access procedure

Data broadcast via Ethernet or file export

Motion compensation: Motion sensors compatible to the system

All standard

Required pitch uncertainty [deg]

0.03

Required roll uncertainty [deg]

0.03

Required heave uncertainty [m]

0.05

Mounting and deployment: Mounting

Hull mounted & Portable

Retractable

N

Used Sonar Methods: Type of system

Phase Measuring Bathymetric Sonar

System Parameters: Min. frequency [kHz]

250

Max. frequency [kHz]

250

Min. depth [m]

0

Max. depth [m]

100

Depth resolution [mm]

3

Max. swath as a function of depth

12

Ping frequency [Hz]

30

Min. beam width across track [deg]

0.75

max Swath Update Rate

30 per second (simultaneous port and starboard)

Pulse length

User selectable