Multibeam vs. Single-Beam Sonar: How to choose the best option for your projects

In the fields of hydrography and marine mapping, choosing between multibeam and single-beam sonar can have a significant impact on the quality and precision of the data collected.

Each of these technologies comes with its own features and advantages, and the right choice depends on the specific needs of your project. This article helps you understand their differences so you can make an informed decision.

What Is a Single-Beam Sonar?

Single-beam sonar uses a single acoustic beam to measure the depth at a specific point on the seabed. It is often used for high-precision surveys over targeted areas.

Advantages of Single-Beam Sonar

• High Accuracy: Ideal for focused surveys where precision is critical.

• Ease of Use: Simpler to set up and interpret, making it a good choice for smaller-scale projects or less experienced users.

• Reliable Data: Delivers accurate and repeatable measurements, which is essential for environmental studies and underwater infrastructure monitoring.

  
  

Limitation to Consider

• Limited Coverage: Since it uses a single beam, it is slower to cover large areas, which can increase survey time.

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What Is a Multibeam Sonar?

Multibeam sonar uses multiple acoustic beams to capture a wide swath of the seabed simultaneously. This enables the creation of detailed maps and the collection of topographic data in a single pass.

Advantages of Multibeam Sonar

• Wide Coverage: Capable of mapping large areas quickly, making it ideal for large-scale surveys.

• Rich Data Output: Provides detailed information about seabed topography and texture, allowing for in-depth analysis and better understanding of underwater features.

• Efficiency: Reduces data collection time—an advantage for extensive and time-sensitive projects.

  
  

Limitation to Consider

• Technical Complexity: Data interpretation may require technical expertise and specialized software, which can be a challenge for some users.

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Differences in Data Deliverables

• Single-Beam Sonar: Deliverables typically include accurate bathymetric profiles and depth maps. These are well-suited for targeted studies, environmental assessments, and monitoring projects.

  
  

• Multibeam Sonar: Outputs include digital terrain models, detailed topographic maps, and point clouds. These are ideal for complex analyses, infrastructure planning, and resource management studies.

  
  

How to Choose?

The choice between single-beam and multibeam sonar depends on your specific objectives, the scale of your project, and your requirements for precision and data detail.

Each technology offers unique advantages, and understanding their differences will help you select the most suitable method for your project.

At BathyDrone-USV, we are equipped to deploy both technologies to deliver the most accurate and relevant data for your needs.

Our partner MARITECH provides high-quality sonar solutions. Their expertise and the reliability of their equipment enable us to ensure precise measurements and dependable results—whether using single-beam or multibeam sonar.

For more information on these technologies and how they can benefit your projects, feel free to contact us!