Pay attention to downloading an important update at the end of March 2017.
Then the vegetation is also visible on the aircraft at Autochart Live
The HELIX 7 Sonar-GPS has in addition to the same fishfinder as the sonar (2D DualBeam 200/83 kHz 4000watt) also a built-in GPS on board. With the Helix 7 Sonar - GPS you get an optimal split-screen display of, for example, navigation together with the fishfinder image.
DualBeamPlus with SwitchFire. 200/83 kHz. Built-in GPS, only Micro SD card slot.
Complete with XNT-9-20-T