[ripndip]

Eagle- I currently run a new model thruhull transducer built by airmar- it is a tilted element transducer which allows it to flush mount on the bottom of the boat (only sticks down about 1/8") which gives you depth and temperature. The transducer is tilted inside the housing at a degree of either 20 or 12 degrees depending on which model you order. I have the 20 degree 600 watt, which was all that was available when I put it in in January 07, but now they have a 1000 watt model. The bottom step of a 23' is exactly 20 degrees, so it works out perfectly. With my 600 watt, I read at speeds up to 40 knots, and so far have read good bottom up to 2300 feet, I had to turn the gain up to get 2300 feet, but it read bottom well. At 1800 feet swordfishing the other night, I didn't have to touch the adjustments. I am using a Raymarine C120 with the DSM300 sounder module. The transducer cost me approximately 245$. It comes with instructions which give you an arrow to point toward the keel for proper orientation.