Do You Have Dual Frequency Single Beam Echo Sounders? Here's What You Need to Know.
Dual frequency single beam echo sounders are an essential piece of equipment for any marine surveying work.
But what is a dual frequency single beam echo sounder? How does it work? And why is it important?
What Is a Dual Frequency Single Beam Echo Sounder?
A dual frequency single beam echo sounder is a type of sonar system that transmits sound waves into the water and then detects and analyzes the echo that is reflected back. This system sends a single beam of sound waves directly down to the seafloor and measures the time it takes for the echo to be reflected back.
The sound waves are of two different frequencies, which enables the surveyor to observe different aspects of the seafloor. The lower-frequency waves penetrate deeper into the seafloor, while the higher-frequency waves provide higher resolution images of shallower areas.
How Does a Dual Frequency Single Beam Echo Sounder Work?
When a dual frequency single beam echo sounder is used, a sensor mounted on a boat sends sound waves into the water. These sound waves hit the seafloor and bounce back up towards the sensor, where they are detected and recorded.
Each echo will be assigned a specific depth, measured in either meters or feet, depending on the system used. By combining the individual echo depths, a detailed map of the seafloor can be created.
Why Is a Dual Frequency Single Beam Echo Sounder Important?
In navigation, the main use of marine echo sounder is:
1. Measuring the water depth to ensure the safety of ship navigation when navigating in unknown sea area or shallow water navigation area.
2. In the special case that other navigation instruments are invalid, the ship's position can be recognised by measuring the water depth.
3. Used in channel and harbour surveying to provide accurate hydrographic data.
4. Modern multifunctional marine depth sounder can also achieve underwater survey, fish detection and tracking and other functions.