Kongsberg EM 3002 Technical specifications

EM 3002
Multibeam echo sounder
Product Description

Kongsberg EM 3002
Multibeam echo sounder
Product description
855--164929 / Rev.A

Note
Kongsberg Maritime AS makes every effort to ensure that the information contained
within this document is correct. However, our equipment is continuously being
improved and updated, so we cannot assume liability for any errors which may occur.
Warning
The equipment to which this manual applies must only be used for the purpose for
which it was designed. Improper use or maintenance may cause damage to the
equipment or injury to personnel. The user must be familiar with the contents of the
appropriate manuals before attempting to install, operate or maintain the equipment.
Kongsberg Maritime AS disclaims any responsibility for damage or injury caused by
improper installation, use or maintenance of the equipment.
Copyright
E2004 Kongsberg Maritime AS
The information contained within this document remains the sole property of
Kongsberg Maritime AS. No part of this document may be copied or reproduced in any
form or by any means, and the information contained within is not to be communicated
to a third party, without the prior written consent of Kongsberg Maritime AS.
Contact information
Support: [email protected]
Sales: [email protected]
24 hrs support telephone: [phone]
Strandpromenaden 50
P.O.Box 111
N-3191 Horten,
Norway

EM 3002 / Base version
II 855-164929 / A
Table of contents
1SYSTEMOVERVIEW 1.....................................
Key facts 1...............................................
System characteristics 2.....................................
2PERFORMANCE 5..........................................
3 INSTALLATION 13..........................................
Introduction 13.............................................
Operator Station 13.........................................
Processing Unit 13..........................................
Sonar Head 13.............................................
4OPERATION 16..............................................
System control 16...........................................
Data logging 18............................................
5 POST-PROCESSING 19.....................................
Post-processing options 19....................................
Brief descriptions 19........................................
6 CUSTOMER SUPPORT 20....................................
Introduction 20.............................................
Installation 20..............................................
Documentation and training 20................................
Service 20.................................................
FEMME 21...............................................
Terms and conditions 21.....................................
7 SCOPE OF SUPPLY AND OPTIONS 22......................
Standard system 22.........................................
Options 22................................................
System integration 22........................................
8 TECHNICAL SPECIFICATIONS 24..........................
Overall specifications per Sonar Head 24........................
Interfaces 24...............................................
Physical specifications 25....................................
Environmental and EMC specifications 26.......................

Product description
III
855-164929 / A
Document logistics
Rev Date Written Checked Approved
A11.03.04 EHa FP KN
B
C
D
E
F
G
(The original signatures are recorded in the company’s logistic database.)
Rev Comments
AOriginal issue.
B
C
D

Product description
1
855-164929 / A
1SYSTEMOVERVIEW
Key facts
The Kongsberg EM 3002 multibeam echo sounder is a very
high resolution seabed mapping and inspection system meeting
the most demanding standards for survey accuracy. The
minimum operating depth is from less than 1 m below its
transducers, and in typical sea water conditions the system
operates to more than 150 m depth (less in warm water and
more in fresh water). Small dimensions and low weight makes
the system portable and easy to install. This allows use on
survey launches and subsea vehicles to 1500 m water depth.
The EM 3002 system has a very high ping rate of up to 40 Hz, a
large number of measurements per ping (up to 254 per sonar
head), 1.5°beamwidth, and electronic pitch and roll
stabilization. 100% coverage of the bottom is achievable at
vessel speeds of about 10 knots in shallow waters with
acrosstrack coverage of up to four times depth with a basic
system. At larger depths the achievable coverage may be up to
200 m, and then 100% coverage is achievable with vessel
speeds up to 20 knots.
The EM 3002 may be configured to use two sets of transducers
(Sonar Heads). This increases the shallow water coverage to up
to ten times the depth, and the number of measurements per
ping up to 508. With an angular coverage sector of nominally
200°(with the heads tilted 40° to each side) the dual system also
allows surveying to the water surface along shorelines, river
banks and man-made structures.
The EM 3002 beamspacing may be set to equiangular or
equidistant. The beams are electronically roll stabilized. The
coverage may be limited by the operator either in angle or in
swath width without reducing the number of beams. In the near
field dynamic focussing is employed. A combination of phase
and amplitude bottom detection algorithm is used, resulting in a
measurement accuracy of 5 cm RMS being achievable.
The system sonar frequency is nominally 300 kHz allowing
small dimensions, good range capability and high tolerance to
turbid waters. The transmit fan may be widened as an aid to
target detection. Integrated seabed acoustical imaging capability
is included as standard. Options include display and logging of
beamformed water column data and of raw stave data (before
beamforming).

EM 3002 / Base version
2855-164929 / A
The EM 3002 can be delivered either as a basic multibeam echo
sounder instrument for system integration, or as a complete
stand-alone seabed mapping system. The Operator Station, a
high-performance PC workstation, will always include the
necessary operator controls for setting and running the system,
data logging, and system testing. Normally the Operator Station
also includes an extensive set of graphical displays for data
quality control, but third-party software may instead be installed
for this purpose.
Postprocessing software for the EM 3002 is available from both
Kongsberg and third-party suppliers. A world-wide marketing
and service organization having many years of multibeam
experience is available for supporting the EM 3002.
→A system overview is shown in figure 1.
→Data example is shown in figure 9 on page 18.
System characteristics
Main units
The basic Kongsberg EM 3002 multibeam echo sounder
consists of three (or four) units:
•Sonar Head(s)
•Processing Unit
•Operator Station
The system may be delivered either with one sonar head (EM
3002S) or with two sonar heads (EM 3002D).The dual sonar
heads can be arranged in different ways. The most common
configuration is to mount the two sonar heads tilted about 40
degrees to port and starboard in order to obtain a wider swath
coverage.
A complete mapping system will in addition include a vessel
motion sensor, heading sensor, sound speed sensor and a
positioning system. For ROV applications a telemetry system is
required for data communication between subsea units and
surface electronics.
Sonar Head
The EM 3002 Sonar Head contains the transducers and all
transmitter and receiver electronics. The diameter of the Sonar
Head is 332 mm and it’s height 119 mm. The sonar head
material is titanium, making the unit robust, durable and 100%
non-corrosive. The transducers are replaceable in the event of
damage for example due to grounding.

Product description
3
855-164929 / A
The maximum deployment depth for the standard sonar head is
500 m. A sonar head is available for maximum 1500 m water
depth.
A single cable with an underwater plug connects the Sonar Head
to the EM 3002 Processing Unit. The cable is normally 15 m
long, optionally up to 45 m.
Existing EM 3000 sonar heads may be used in an EM 3002, but
a factory check-up is recommended.
Processing Unit
The EM 3002 Processing Unit performs the beamforming and
bottom detection. It further controls the sonar head with respect
to gain, ping rate, pitch compensation of the transmit fan and
roll compensation of the receive beams. It contains all interfaces
for time-critical external sensors such as vessel attitude (roll,
pitch, heading and heave), vessel position and external clock.
The Processing Unit is contained in an instrument case prepared
for mounting in a 19” rack (height 4U). All circuit boards are
plugable into a cPCI bus backplane giving a very robust
solution. Ethernet is used for data communication with the
Operator Station.
Operator Station
The Operator Station of the EM 3002 is the HWS 10 high
performance PC workstation with Kongsberg SIS software.
Additional third-party sw may be installed. The HWS 10 is dual
bootable to either Linux® or Microsoft Windows XP®.
Software for controlling the EM 3002 installation and runtime
parameters, data logging and running selftest on the system is
always included as standard.
The HWS 10 is normally supplied with a 17.4” industrial LCD
monitor with a resolution of 1240x1024 pixels. Support for a
second monitor is included. A spill-proof US keyboard and a
standard optical mouse is normally supplied, but optionally a
small IP 65 rated keyboard with integrated track stick can be
delivered.

EM 3002 / Base version
4855-164929 / A
Figure 1 EM 3002 System overview
(CD21510)
Storage
media
Processing Unit
Optional, may also be
connected to the ship's ethernet.
Interfaces:
Sound Speed Sensor
Tide
Center depth output
Ethernet
Internal
Ethernet
Serial interfaces:
Special interfaces:
Supply voltage:
Positioning systems
Attitude (roll, pitch and heave)
Heading
Clock
Trigger input/output
Clock synchronization
115 or 230 Vac 50/60 Hz
Sonar Head Second Sonar Head
(optional)
Operator
Station