Sonar Bathyswath-2-UW 468kHz

Shallow survey efficiency & quality for commercial, scientific & military needs

The Underwater (UW) version of Bathyswath has the system electronics inside a pressure-tight sub-sea unit bottle. This is useful for mounting on the end of a pole fixed to a survey vessel, or on sub-sea vehicles. Bathyswath provides wide swath widths; this increases survey speeds significantly, especially in shallow water. It has 2 frequencies : 234 or 468 kHz, to be used respectively up to 200 & 80m of water depth.

ITER Systems

La Motte-Servolex, FR

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Description

Bathyswath 2 is the standard version of our bathymetric systems, in use since 2015. It gives excellent performance and reliability in a small, low-power package. It can be used at any frequency from 100 to 500 kHz.

Bathyswath-2-UW system is our underwater and integrated version, it consists of :

The Subsea Unit (SU) in titanium. It is waterproof to 300 (or 3000m) and includes :

        - Sonar electronics for 1 or 2 transducers
        - A communication and power board
        - An optional INS or MRU (Ekinox A or E)
        - An optional Sound Velocity Sensor (miniSVS)
        - One or two transducers (234 or 468 kHz)

An umbilical (20m by default, longer or shorter on demand)

To complete the bathymetric "package", you will also need the following ancillary devices :

A GNSS receiver
- Double antenna for the heading value and PPS for the GPS time
- RTK (Rover) or satellite correction services (Omnistar, Atlas, etc.) or GSM for centimetric position
A sound velocity profiler for the speed of sound in the water column

The Bathyswath-2 UW 468kHz package is used at the end of a pole or on underwater vehicles. The bottle contains Transducer Electronics Module, power supply, cooling fan & Ethernet switch &
optionally Ekinox INS/IMU & miniSVS sound velocity sensor. The transducers are fixed to each side.

Bathyswath-2 UW is part of the company ITER Systems : the world's most experienced team of developers of interferometric sonars. Its products are direct descendants of the world’s first commercially available interferometric swath sonar system, developed into SWATHplus, which renamed Bathyswath in 2013. Bathyswath 2 is a completely new design, with improved performance and usability.

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Specifications

Physical properties of transducer head: Length [m]

0.66

Width [m]

0.29

Height [m]

0.192

Min. external power [V]

9

Max. external power [V]

36

Max. power consumption [W]

25

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

Y

Real-time integration of SV-profile

Y

Explanation of SV-profile application process

Ray-tracing from SV profile

Maintenance criteria: Mean time to repair [hr]

1

Interfaces: Compatible software

Compatible with all industry-standard packages, including QINSy, Hypack, SonarWiz, EIVA, CARIS, GeoDas, PDS and StarfixAlso, a basic but fully-functioning acquisition and processing package is supplied included in the price of the system.

Compatible hardware

All standard motion sensors and positioning systemsWindows computers for software

Real-time access procedure

Ethernet interface to hardware; TCP/IP interface between Bathyswath driver software and external software

Motion compensation: Motion sensors compatible to the system

All standard

Required pitch uncertainty [deg]

0.05

Required roll uncertainty [deg]

0.05

Mounting and deployment: Mounting

Hull mounted & Portable

Retractable

Y

Used Sonar Methods: Type of system

Interferometric Bathymetry; Sidescan

Bottom Detection Method

Vernier Phase Detection

System Parameters: Min. frequency [kHz]

438

Max. frequency [kHz]

498

Min. depth [m]

0.1

Max. depth [m]

3000

Depth resolution [mm]

1.5

Max. Slant Range [m]

150

Max. swath as a function of depth

15

Max. pings / second

100000

Ping frequency [Hz]

50

Min. beam width across track [deg]

0.05

Min. beam width along track [deg]

0.85

Number of selectable frequencies

1

Bottom Coverage: Footprint in nadir direction [m]

0.74

Smallest identifiable cube [m3]

0.2

Max. swath width [m]

300

Equal footprint spacing

Y

Max. number of points per ping for side scan operation

100000