Yumeya Posted March 23, 2017 Posted March 23, 2017 Looking for a new one, I don't need maps or even GPS. Basically I've narrowed it down to 3 specific models. The Garmin striker 7sv, what I like about it is the chirp with down imaging and side imaging it also goes up to 800 KHz on the clear vu and down vu. The Humminbird Helix 7 Chirp SI GPS G2, I like everything about this except it does not have 800 KHz but it has a 455 kHz: 420-520 kHz. The 3rd is the Humminbird Helix 7 DI, it has a higher frequency (800 KHz) for its down imaging but it does not have side imaging....I kinda want side imaging. Right now I have a older Humminbird on my boat, so if I did go with Humminbird I would not need to drill new holes in my boat. Thoughts please. Quote
Super User Wayne P. Posted March 23, 2017 Super User Posted March 23, 2017 What is it about 800 kHz that interests you since it has less coverage and less range than 455 kHz? What holes in your boat do you think will match a Helix model? What is your old Humminbird? Quote
Yumeya Posted March 23, 2017 Author Posted March 23, 2017 800 KHz will show better detail when closer to the shorelines. Less range and less coverage but better detail. The Humminbird I think I have is a 500 series, but has the same transducer mount screw holes as the newer helix series, not 100% sure about the G2 mounts though. Quote
Super User Wayne P. Posted March 23, 2017 Super User Posted March 23, 2017 All the 500 series units come the XNT transom mount. Plastic two parts that have impact trip. That is for the 2D, DI, or SI models. All new units that have XNT transducers have the exact same transom mount. Example: XNT 9 20 T is the Dual Beam 2D sonar transom transducer. The included transducer for every model is in the specs for each model on the Humminbird website. 1 Quote
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