Free tools for hydrographers
Calculators
A suite of free online tools for multibeam and sidescan sonar planning, calibration, and analysis. Built from field experience and provided without cost — use them as informational aids, not as a substitute for engineering judgment.
Offline calculator bundle
All tools in a single downloadable file — works without an internet connection.
Download v0.23 Beta
Updated 14 July 2026
Multibeam echosounder
9 tools
Swath width
Total swath for a given depth and swath angle.
→ Open
Dual head swath width
Advanced calculator for dual head systems with asymmetric swaths.
→ Open
Footprint size
Nadir footprint from transmit/receive beamwidths and altitude.
→ Open
Hits per grid cell
Sonar hits in a grid cell based on swath, altitude, speed, and ping rate.
→ Open
Survey total time
Total time for a single-swath MBES survey given area, depth, and speed.
→ Open
Beamwidth after frequency change
Resultant along- and across-track beamwidths at a new frequency.
→ Open
Tilt adapter lever arm
Resultant lever arm after rotating a sonar on a tilt adapter.
→ Open
Patch test – tilted head line spacing
Line spacing for all three patch tests with a tilted sonar head.
→ Open
Patch test – yaw line spacing
Distance between yaw test lines for desired overlap at minimum depth.
→ Open
Sidescan sonar
1 tool
Utilities
1 tool
These calculators are informational tools provided without warranty or cost. They should not be relied upon when planning any survey where financial or safety factors are present. MosaicHydro is not responsible for the consequences of any decisions or actions taken based on their output.
