Raymarine CPT-S Plastic Conical HIGH CHIRP Thru-Hull 0-Degree Angled Element TransducerCPT S Through Hull Transducer Overview The CPT S family of through hull transducers provides high resolution sonar imagery and reliable depth recording for Raymarine Element and Axiom chartplotters. The low profile design eliminates the need for a fairing block while offering excellent high speed performance. CPT S through hull transducers are available in bronze or plastic housings.??? Features and Specifications Supports a single High CHIRP sonar