HELIX 12 SI G1 will have CHIRP 2d and traditional 455/800kHz SI and computer generated DI (no DI piezo in the HELIX SI G1 units) ...
HELIX will only share waypoints with ONIX ...
ONIX SI will have CHIRP 2d/DI/SI (with version 3.00) and dedicated DI ...
ONIX SI will share 2d/DI/SI, accessories, and waypoints with ONIX sonar unit ...
Rickie