Advanced Firmware
(H) (formerly known as Professional Series): This upgrade to the Basic firmware (G) includes additional procedures requested by the United States Geological Survey that are intended to improve the accuracy of measurements in troublesome conditions. Some of the many improvements include:
Add or delete a station anywhere in the cross section
Up to 5-point measurements in a vertical (Surface, 0.2, 0.6, 0.8, Bottom)
Ability to perform ice measurements.
Display of available memory
Warning flags that identify the incorrect meter, sounding weight