These mount and cover the TotalScan transducer which comes with the Elite TI range providing protection and also maintaining a crisp image with the structure scan. Side imaging requires the transducer to sit lower than the sides of the hull to not interfere with the image. The image above shows a transducer mount sitting on a PA14 and you can see the height of the transducer sits approx. the same height as the twin hull section at the rear. This extends below the hull on other Hobie models.
This is made from tough ABS plastic and comes with stainless steel fasteners required.