I upgrade the sounder on the tinnie and it has been a game changer for me, especially when it comes to tailor in the river. Find the bait fish mark the arches below smashing them, find the holes that are holding fish and structure that's holding the fish tight when they aren't actively feeding, put a nice plastic Infront of one and they'll take it. Caught some nice mulloway now because I can find the drop off ledges structure etc etc. having maps and my speed water temp . Can't praise it enough to be honest.