MBES Patch Test – Yaw Line Spacing Calculator
This tool will determine the distance between the Yaw test lines to achieve the desired overlap at the minimum depth. Enter the minimum Altitude/Depth along the Yaw Lines, the swath…
Multibeam Swath Width Calculator
This tool will calculate the Total Swath for a given depth (sonar altitude) and Swath Angle. Enter the sonar altitude (depth) and your swath in degrees. The calculation will give…
Multibeam Backscatter Grazing Angle
Why is the grazing angle of the acoustic pulse on the bottom so important in Multibeam backscatter, and even MORE important when generating multispectral backscatter imagery? Look at the road…
MBES Footprint Calculator
This tool calculates the nadir size of a multibeam footprint based on Transmit & Receive Beamwidths and the altitude of the sonar above the bottom. If you do not know…
Sidescan Basics II
The second part of Sidescan Basics covers Practical Acoustics, including Source Level, Pulse Length (Width), Frequency, and Resolution, to enable the new operator to understand how each of these sonar…
Sidescan Basics I
This 18-minute video covers the very basics of sidescan sonars, including the principles of operation, how objects are detected, limitations, terminology and image interpretation. Below is the PDF document referenced…
Stop Using DGPS!
This article, first published in Hydro International in 2012, is still relevant but has a few caveats due to advances in Satellite Based Augmentation Systems (SBAS). In 2012 SBAS corrections…
