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EM® 2040C MKII


Catalog excerpts

EM® 2040C MKII - 1

MULTIBEAM ECHO SOUNDER The EM 2040C MKII is a shallow water multibeam echo sounder based on EM 2040 technology. It is an ideal tool for any high resolution mapping and inspection application. With the release of the EM 2040 MKII series Kongsberg Maritime has upgraded the hardware and software to increase the swath and improve the data quality of our EM 2040 series. Key facts The system fulfils, and even surpasses, IHO-S44 Exclusive Order and the more stringent LINZ sp ecification. The operating frequency range is from 200 to 400 kHz with frequency selection in steps of 10 kHz. The operator can on the fly choose the best operating frequency for the application: 300 kHz for near bottom, 200 kHz for deeper waters and 400 or 700 kHz for very high resolution inspection. 700 kHz inspection mode provides the highest resolution available contained within a narrow 30° swath. By alternating b etwe en the fre quenc y mo de s p er ping, the system is capable of providing the operator with Multi Frequency Backscatter of up to 5 frequencies in a single pass. The same functionality allows the system to alternate between a full swath mode and a high resolution mode providing full coverage while maintaining ultra high resolution over a target. By utilizing both CW and FM chirp pulses, the system can achieve long range capability and still maintain a high resolution. The maximum depth range for a dual head system in cold ocean water is 520 m at 200 kHz with a swath width up to 700 m. Due to the large operating bandwidth, the system has an output sample rate up to 60 kHz. The system can effectively operate with very short pulse l e n g t h s . T h e s h o r t e s t p u l s e i s 14 m i c r o s e c o n d s , which gives a raw range resolution (ct/2) of 10.5 mm The angular coverage for 200 to 320 kHz modes are 140° with one sonar head, allowing coverage of 5.5 times water depth. For a dual transducer system, 200° angular coverage or 10 times the water depth is achieved on a flat bottom. Components The basic EM 2040C MKII has three components: a sonar head, a processing unit and a workstation. The EM 2040C MKII can be delivered with the standard processing unit or an IP67 rated (24 VDC) portable processing unit. For real-time motion stabilization and compensation, data input from a motion sensor, heading and a p o s i t i o n i n g s y s te m i s re q u i re d . A s o u n d s p e e d profile of the water column is recommended for realtime correction, especially for a dual head system. As an option the EM 2040C MKII can be delivered with the dual swath capability, allowing a sufficient sounding density to meet survey coverage standards along track while maintaining a high vessel speed. All electronics are contained in the sonar head(s) which is interfaced to the processing unit via GBit Ethernet. The processing unit also supplies 48 VDC power via the same cable. Operator control, data quality inspection and data storage is handled by the hydrographic workstation running SIS software or by 3rd party software. EM 2040C is also available in a 1500m depth rated version with a 130° swath for ROV or AUV operations.

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EM® 2040C MKII - 2

FEATURES • Included Features Optional features • 200-400 kHz wide frequency range • Dual swath • Seabed image • Water column display and logging for SIS users • 700 kHz mode • EM® MultiFrequency Mode • Extra detections • Roll, pitch stabilisation • Water column display and logging • Yaw stabilisation with dual head • Water column phase logging • Short pulse lengths, large bandwidth • Dual Head • Transmit and receive nearfield focusing • Easy to install TECHNICAL SPECIFICATIONS Frequency range Beam width Max ping rate Swath coverage sector Depth Rating Beam patterns No. of beams per ping...

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