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1. Multibeam Echo-sounding System
& Single-beam Echo-sounding System
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- Components of a single-beam echo-sounding system
(SBES)
- Components of a multibeam echo-sounding system
(MBES)
- Comparison between SBES and MBES
- Positioning System of SBES and MBES
- Foot print of SBES and MBES
20 February 2012 1

2. Single Beam Echosounding System
• Simple configuration
– GPS Antenna (for
positioning)
– Single transducer (for
sounding)
• Minimum coverage
of survey area
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3. Data Acquisition
Computer
SBES Diagram
GPS Receiver Bathy 500
Transducer
GPS Antenna
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5. Single Beam Echosounding System
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6. 6

7. Multi-Beam Contour
Mapping System
Magnetic
Intensity
Satellite Communication
(INMARSAT)
Expendable
Sensors
Acoustic Doppler
Current Profiler
CTD & Water
Sampler
Gravity
Meter
SUB-BOTTOM
PROFILER
HEADING & DYNAMIC
MOTION SENSOR
DGPS Reference
Station
Satellite Navigation (GPS)
SURVEY SYSTEMS CONFIGURATION OF BRPH PRESBITERO AND VENTURA

8. 8

9. 9

11. Single beam echo-sounding system vs
multi-beam echo-sounding system
- Coverage
- Limitations of both systems
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12. 12

13. 13

14. 14

15. Multibeam data
- 100% coverage
Singlebeam data
- sparse coverage
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16. 16

17. Method Soundings/hr Mb/hr
Lead line 10 .00008
Echo sounder 21,600 .1728
1st gen. 292,000 2.1
2nd gen. 324,000 27.9 (ss)
3rd gen. 1,500,000 79.8 (ss)
in 5 m of water 30,000,000 1,000
Fansweep-30 300,000,000? 10,000??
Water column data 60,000
From Dr. Larry Mayer
Data Volume Comparison
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18. Positioning System
The positioning system required by a single-beam
echo-sounding system is simpler compared to
multibeam system.
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19. Positioning System
GPS Antenna
Dual GPS
baseline
Motion
Sensor
Gyro
Compass
Reference
Point

20. Positioning System
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21. Summary
- Single-beam echo-sounding systems can provide enough data for
near-shore surveys and other surveys which does not require a full
sea-floor coverage.
- The positioning system of a multibeam echo-sounding system is more
complex compared to a single-beam system.
- The vast amount of data that comes with the continuous
development of the multibeam echo-sounding system requires more
powerful algorithms and programs for data processing.
- The narrow beamwidth and smaller footprint of MBES results to a
more accurate and better horizontal resolution of the sea-floor as
compared to the larger foorprint of SBES.
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