Helix features

[bigfoot17]

What are the main differences in features between the helix 7/8 g3n si and the helix 9 g3n msi if any besides size?

[Wayne P.]

What are the main differences in features between the helix 7/8 g3n si and the helix 9 g3n msi if any besides size?

If you would use the entire model names for each, you can see some of the differences.
Helix 7 CHIRP MEGA SI GPS G3N
Helix 8 CHIRP MEGA SI+ GPS G3N
Helix 9 CHIRP MEGA SI+ GPS G3N

The Helix 7 doesn't have Down Imaging, it gets DI views by blending the two SI pulses (composite DI) and it has a single memory card reader.
Both the 7 and 8 are MSI, but the 7 is not +.

The 8 and 9 have the same SI+ transducer so just the display size is different.
The 8 and 9 will run the MEGA 360 and the 7 will not.

[bigfoot17]

Thank you for the info Wayne!