I don't read much into all the lawsuits in this space. High technology is nothing but fierce competition, reverse engineering, and patent lawyers. I don't think end consumers will see much of an impact.
Johnson, Navico, and Furuno has sued Garmin.
Raymarine has sued Furuno.
Furuno has sued Navico.
Garmin won the Navico...http://www.tradeonlytoday.com/2015/07/garmin-wins-ruling-navico-patent-lawsuit/