Konsberg EM 124, Installation Manual

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System description
EM 124 multibeam echo sounder is a high performance echo sounder for deep water
mapping.
The EM 124 is designed to perform seabed mapping to full ocean depth with an
unsurpassed resolution, coverage and accuracy. The system is cost effective, reliable,
and easily operated. The design of the EM 124 is based on more than 50 years of
hydrographic experience with echo sounders, sonars and underwater positioning for
civilian and military use. It is the latest model in a series of deep sea multibeam echo
sounders that started with the EM 12 in 1990.
The EM 124 consist of new state-of-the-art electronics and separate transmit and receive
transducers in a Mills Cross configuration. It uses the same field-proven transducers as
the EM 122, making it easy to upgrade. Care has been taken to design a highly, modular
and flexible solution with compact electronics for easier and faster installation. Due to a
flexible transducer design, the system can be tailored to almost any required size. The
largest standard size, 0.5 x 1 degrees, gives the ultimate system performance in terms of
resolution and range, while a smaller 4 x 4 degrees solution allowing full ocean depth
surveys even on smaller vessels.
The EM 124 multibeam echo sounder consists of the following main units.
• Transducer arrays
• Transmitter Unit(s)
• Receiver Unit(s)
• Processing Unit
• Hydrographic Work Station
To form a complete system it is also required to have sensors providing vessel attitude,
velocity, position, sound speed profile of the water column and speed of sound at the
transducer depth.
Kongsberg EM 124 Installation Manual