I have the "pre ICE" version of the hummingbird it has the sonar/gps and it, to me, is a must have. Served me faithfully and without an issue for 10+ years.
I also take this unit up as a portable GPS/Sonar on remote lakes too (have the summer transducer with suction cup too).
It's great - use the GPS to get exactly over the structure you want (or to your previous way point) - drill a hole, then switch it to sonar and fish away.
Camera, of course, is separate, but I like it that way. I keep the camera in the tent and grab my sonar if I'm going to drill another hole or do some hole hopping.
The 3 in 1 is cool though.
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