While wandering among the Big Four of dedicated marine-electronics systems, you may well bump into Geonav, the brand that’s trying to become Number Five. Long based in Italy, Geonav is now the saltwater mark of Johnson Outdoors, which also owns Humminbird along with extensive engineering and manufacturing operations here in the States. And while the brand may not acknowledge sailing quite yet, it certainly exemplifies the current demands of mainstream convergence and what it takes to add something new to the do-it-all category. You’ll see two handsome M.F.D. series along with radars, fishfinders, an autopilot, and numerous Ethernet, NMEA 2000, or NMEA 0183 peripherals. Add to that the option of Side Imaging, which Humminbird actually pioneered and may remain marginally better at than Navico’s StructureScan facsimile. What’s still unique—besides a brand-new interface that seemed interesting in prototype—is the ability to display the most advanced cartography bundles available from both C-Map or Navionics, 4D and Platinum+, respectively. Geonav’s MID 110 multi-instrument display is also unusual in that it has an Ethernet port in addition to NMEA 0183 and 2000. What that means in practice hasn’t been revealed, but what’s possible is 4 colorful inches of auxiliary video, charting, fishfinding, or other moving imagery.