Raymarine CP470 CHIRP Sonar Module [E70298]CP470 CHIRP Sonar Module High Performance Sonar Module For Offshore and Coastal Fishing CHIRP Sonar Module Engineered for serious anglers, the CP470 sonar module bring best in class target separation and high resolution CHIRP sonar imagery to Raymarine multifunction displays. Using a wide spectrum of frequencies and greater sensitivity the CP470's advanced CHIRP transceiver can see through dense schools of baitfish, identify thermoclines, and