Not a lawyer, and not completely familiar with all the litigation, but a quick search pulled up a civil action from November 2016...Case 2:16-cv-00190

28. Garmin’s Accused Products fall into the categories of products, or portions of
products, that are generally referred to by Garmin as fishfinders, fishfinders/GPS combos,
chartplotter/sonar combos, transducers, and/or sonar modules. In operation, these products
generally include a head unit that has a display, electronics that are located either in the head unit
or a sonar module, and a transducer that includes a linear transducer element and a circular
transducer element. Upon information and belief, Garmin’s current versions of the Accused
Products are found in Garmin’s 2016 Marine Catalog

NAVICO lists (24) requests for relief including going after Garmin for false advertising pertaining to ClearVu and its ability to see under the boat.....