Humminbird Side Imaging Forums
Side Imaging Forums => 997c SI, 998c SI & 999ci HD SI => Topic started by: markbigsur on October 25, 2015, 03:06:10 PM
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Hello all,
I fish deep sea, mainly salmon and tuna. I have moved the transom mount transducer that came with my 998csi all over the place and have not been able to get good readings even with the regular sonar at 4-5knts. There is so much turbulence at the transom on my 2052 trophy I/O mainly from the exhaust that I am going to install the Thru hull xpth9 hdsi 180t transducer on the bottom of my boat. Here is what I would like to accomplish: 1. Be able to see bait balls and and bottom on the reg. sonar while running at 20kts or so. and 2. be able to use the side scan and DI at 2-6knts while trolling to pick up bait and fish to the sides of the boat. The water is often 2000-3000ft deep for tuna. I set the reg sonar for just the top 300ft. Will the SI still look to the sides even with the bottom so deep? And will the XPTH get a good reading on reg sonar while running or will I also need a shoot thru the hull for running?
Thanks for the help,
Mark
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Doing some more research looks like what might work best for what I need would be an airmar b-260. Any thoughts on this would be appreciated.