4205

Tri-Frequency Side Scan Sonar

The next-generation 4205 is a versatile side scan sonar system that can be configured for almost any survey application from shallow to deepwater operations. EdgeTech’s Full Spectrum CHIRP technology to provide crisp, high-resolution imagery at ranges up to 50% greater than non-CHIRP systems; thus allowing customers to cover larger areas and save money spent on costly surveys.

Edgetech

West Wareham, US

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Description

EdgeTech’s Full Spectrum® CHIRP technology to provide crisp, high resolution imagery at

ranges up to 50% greater than non-CHIRP systems; thus allowing customers to cover larger

areas and save money spent on costly surveys. In addition to the high-resolution imagery

that EdgeTech is known for, the 4205 comes with a number of new features which makes

the system even more flexible and powerful in offshore operations. The 4205 is available

in either a tri-frequency side scan sonar configuration or motion tolerant and multi-pulse

configuration. The tri-frequency version allows surveyors the option to operate any two

frequencies simultaneously from the tri-frequency system. Long range operations for

example can be achieved with a selection of 230/540kHz combination. Then, on-demand the

system can be changed to a 540/850kHz system for an even higher resolution survey. The

4205 motion tolerant configuration with multi-pulse provides surveyors the ability to operate

either at faster survey speeds or in more adverse weather conditions while still obtaining

high quality underwater imagery. Additionally, this configuration can be operated in a single

pulse high-resolution mode for those operations that require an even more finite view of the

seafloor.

In both the tri-frequency and motion tolerant/ multi-pulse configurations, towfish and target

positioning has been improved with the integration of a more accurate heading sensor

that can be coupled with an optional USBL beacon. Additionally, all systems now come

with Increased towfish power to support a wider range of additional 3rd party sensors. All

EdgeTech 4205 systems are comprised of a topside system and a reliable stainless steel

towfish. Topside processors come in a choice of configurations from portable to rack mounted

units. In addition, an easy-to-use GUI software is supplied with every unit.

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Specifications

Towfish: Model identification

4205

Length [m]

1.4

Width [m]

0.2

Height [m]

0.12

Weight in air [kg]

50

Max. depth rating [m]

2000

Transducer type and material

Aluminum; Urethane; PZT

Materials used

Choice of stainless steel or Lightweight Aluminum

Fish height from seabed determination method

Bottom track on Sidescan Echo

Deployment methods

Winch/A-frame; over the side

Depression technique

Optional v-fin depressor wing

Transceiver and recorder: Model name

4205

Data processing and imaging capabilities

Supplied with acquisition; target logger; & CoverageMapper software

Standard system interfacing capabilities

Standard XTF output for 3rd party interface

Generation of firing trigger

Internal; or External options

System Description: System type

Stand alone, Integrated

Mode of operation

Simultaneous dual frequency

Location of digitation

Towfish

More information: Application

Cable/pipeline surveys; geological/geophysical surveys; channel clearance; etc.

Distinguishable features

Tri-Frequency and Motion Tolerant versions

Cable and winch: Type of Cable supported

Coaxial

Max. length of cable [m]

10000

Operating frequencies: Min. frequency [kHz]

100

Max. frequency [kHz]

900

Min. pulse length [µs]

1000

Max. pulse length [µs]

20000

Source level [dB]

226

Max. Range [m]

500

Min. beam width [deg]

0.2

Max. beam width [deg]

0.2

Min. vertical beam width [deg]

50

Max. vertical beam width [deg]

50

Min. depression angle [deg]

20

Max. depression angle [deg]

20

Max. horizontal resolution [cm]

1

Max. operating speed [kt]

10