The Airmar P79-8G in-hull transducer is a great choice for various boats. It can adjust to hull deadrise angles from 2° to 22°, ensuring accurate depth readings by vertically orienting the beam to receive echoes. No need to drill holes, and there are no hull protrusions. It's designed for solid fiberglass hulls and can adhere to aluminum hulls under 3.8 mm thick. Ideal for planing-hull power boats, trailered boats, rigid inflatable boats (RIBS), and racing sailboats up to 8 m long. It features exclusive Xducer ID® technology. The P79 consists of a base bonded to the hull and filled with liquid, with a separate transducer attached via a twist lock. Sound waves travel more efficiently through the liquid for top performance. It also replaces Garmin 010-10327-20. The package includes a transducer, a flange base, and a locking ring with an O-ring.

Using the Airmar P79 transducer is easy. First, make sure your boat's hull is suitable, either solid fiberglass or an aluminum hull under 3.8 mm thick and up to 8 m long. Bond the base of the transducer to the hull, then fill it with the provided liquid. Attach the separate transducer to the base using the twist - lock mechanism. When using, the transducer will automatically adjust to hull deadrise angles from 2° to 22° to give you accurate depth readings. As for maintenance, keep the transducer clean. Check the bonding of the base to the hull regularly to ensure it's secure. Also, inspect the locking ring and O - ring for any signs of wear or damage. If you notice any issues, replace the parts as needed. And remember, since it doesn't require drilling holes in the hull, you don't have to worry about water leakage from drilling points.