Raymarine CPT-S High CHIRP Plastic Thru-Hull Flush Mount Transducer - 20 Angle [A80447]CPT S High CHIRP Plastic Thru Hull Flush Mount Transducer 20 Angle The CPT S High CHIRP transducer provides high resolution sonar imagery in a small and inexpensive package. With a simple design, the CPT S is easy to install, while still offering excellent performance at speed. This CPT S is a low profile, flush mounted plastic Thru Hull High CHIRP transducer compatible with Raymarine's CP100 sonar module and embedded CHIRP MFD's. This single element