for trolling .... instead of wire line... you can use a downrigger... it is sort of like an "outrigger" but under water. Allows you to put your lure at a deep depth (exactly) without trolling wire or heavy drails.(uses a very heavy weight that is not attached to your fishing line) when the fish hits, the clip releases and you free of the downrigger. Just like an outrigger.
I would like to see someone automate it so it becomes a "smartrigger", it could connect to the depth sounder and then be able to automagicly adjust itself to maintain a specified distance from the bottom. (I am loaded with ideas....just not enough time to see them thru)
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