What is the difference between Chirp SI and Chirp Mega SI

  • Mike Culpepper
    Posts: 2
    September 23, 2019 at 8:30 am #1880502

    New to the forum. Looking at buying used Helix 10 or 12 for my older Pathfinder 2200V.

    Found a Helix 12 Chirp SI, but wondered what the difference is between this and Mega SI? Is the chirp referring to the traditional sonar? If so, how much of a difference is there between “regular SI and Mega SI?
    Thanks

    Pat McSharry
    Keymaster
    Saint Michael, MN
    Posts: 713
    September 23, 2019 at 4:58 pm #1880625

    It’s a pretty big difference especially in shallow water 20′ or less. mega imaging uses a higher frequency that results in a more clear image. I would make sure any humminbird you’re looking at has mega imaging.

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