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EM 122

EM 122

MULTIBEAM ECHO SOUNDER

EM 122 full ocean depths capability has been replaced by EM 124

Description

EM 122 multibeam echosounder is a high performance echosounder for deep water mapping with up to 288 simultaneous beams.

It has been replaced by EM 124 system with full ocean depth capability.

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Specifications

Physical properties of transducer head

Length [m]

0.18

Width [m]

0.76

Height [m]

0.2

Min. external power [V]

115

Max. external power [V]

230

Max. power consumption [W]

2000

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

Using Schnell\\\\\\\'s law refraction, in real time

Interfaces

Compatible software

SIS, Hypack, QINSY, EIVA, CARIS and others

Compatible hardware

Integrates with SBP 120 and TOPAS. Sound velocity at transducer; Sound Velocity profile; Position; Heading; 1PPS; Single beam echo sounder (optional).

Real-time access procedure

Acquisition software; Gigabit Ethernet

Motion compensation

Motion sensors compatible to the system

Seatex MRU5; Seapath 300; Applanix POS/MV & others

Required pitch uncertainty [deg]

0.02

Required roll uncertainty [deg]

0.02

Required heave uncertainty [m]

0.05

Mounting and deployment

Retractable

N

Mounting

Used Sonar Methods

Type of system

Multibeam echosounder

Bottom Detection Method

Amplitude and phase

System Parameters

Min. frequency [kHz]

10

Max. frequency [kHz]

13

Min. depth [m]

20

Max. depth [m]

11000

Depth resolution [mm]

20

Max. swath as a function of depth

6

Max. pings / second

864

Ping frequency [Hz]

5

Min. beam width across track [deg]

0.5

Min. beam width along track [deg]

1

Number of selectable frequencies

1

Bottom Coverage

Footprint in nadir direction [m]

0.4

Footprint at max. horizontal range [m]

1.3

Max. swath width [m]

35000

Equal footprint spacing

Y

Max. number of points per ping for side scan operation

100000

Uncertainty

RMS of nadir depth measurement [m]

0.5

Intended S44 order

1

Max. survey speed for specified RMS [kt]

20

More information

Distinguishable features

Dual and triple frequency. Mammal protection

General

Date of first release

2005

Documents

Brochure
migrationpsjts8.pdf
587.8 KB
migrationpsjts8.pdf
Other documents
  • Discovering the redefined EM multibeam series (2)
    729.72 KB
  • Mounting of EM 122 and SBP 120 transducers - Oden icebreaker
    414.29 KB

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