Although forward-looking sonar (FLS) units, such as manufactured by Interphase and EchoPilot, can offer some utility, I suspect they represent a lower “value” (utility vs cost ratio).
In addition to Interphase and EchoPilot, FarSounder recently attempted the crossover to the recreational market. Furuno
and Si-tex make “searchlight” sonar, which displays an image around your boat. Only Furuno
and Si-tex have searchlight units aimed at the recreational market though. Humminbird produces a “side-scan” unit for the recreational market.
See the previous discussion at: www.cruisersforum.com/forums/f105/forward-sonar-5541.html