For fire and rescue the helix 12 is the answer
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Thanks Vicko. That's pretty definitive!For small squishie shallow stuff the new humingbird helix is by far the best (i can see octopus on the sand with it)
For deep structure garmin is king (gtm51 transducer with a xsv unit can find wrecks up to 150m in good conditions)
I'm hearing similar from another FD source, Mike. Will call you to discuss further.For fire and rescue the helix 12 is the answer