This giver needs extra attention, you have to cut the so called fairing block on the shape of the surface. One side is on the inside on the hull, and the other on the outside. This giver can be seen for large surfaces. This is due to the large viewing bundle of 25 deg. Get more coverage under the boat with a new broad bundle of CHIRP. Offering a high frequency range of 150 to 250 kHz and a constant 25 deg beam width, these transducers are truly broadband at its best. In addition to improving the performance of CHIRP ready echo sounder, fishermen will achieve twice the coverage of the ship with the new broad bundle of transducers compared to the current high frequency CHIRP transducers.