Raymarine CPT-S In-Hull Chirp Transducer 170-230 kHz

The Raymarine CPT-S In-Hull Chirp Transducer 170-230 kHz is the silent workhorse of modern fishfinding, engineered for anglers and boaters who demand precision below the waterline without the noise of traditional through-hull installations. Built as an in-hull design, this transducer mounts directly inside your hull—ideal for fiberglass boats where drilling through the bottom isn't an option or simply isn't desired.

Whether you're targeting walleye in freshwater lakes or working structure in saltwater, this Raymarine unit delivers the sonar clarity that separates productive days from frustrating ones. The CPT-S operates on dual frequencies within the 170–230 kHz range, providing both broad-coverage scanning and detailed target definition in a single compact package. This frequency band excels at medium-range penetration and excellent resolution, making it responsive to baitfish, gamefish, and bottom structure at typical recreational fishing depths.

The Chirp sonar technology delivers superior target separation and clarity compared to single-frequency alternatives, allowing you to distinguish between individual fish, weeds, and hard bottom in high-detail color displays. Weighing just 1.21 pounds, the transducer integrates seamlessly with compatible Raymarine chartplotter systems, leveraging the brand's proven architecture for reliability and ease of use. In-hull installation suits anglers who value aesthetics and simplicity without sacrificing performance; the transducer couples effectively with the hull for optimal sonar performance.