Airmar P79 In-Hull Transducer Humminbird 9-Pin

Overview

Built for anglers running solid fiberglass hulls or thin aluminum hulls on boats up to 25 feet — especially if you're trailering your rig or running a rigid inflatable. This is the transducer you choose when you don't want to drill holes through your hull and need depth readings you can trust, even on boats with moderate to steep deadrise angles.

The P79 in-hull transducer mounts cleanly below your waterline without hull penetrations. It uses a liquid-filled base bonded to the hull and a twist-lock transducer head that delivers accurate depth readings by orienting itself to match your hull's deadrise — from flat bottoms to 22-degree angles. Sound travels more efficiently through the liquid coupling than air-filled pucks, so you get the performance of a through-hull install without the commitment.

Key Features

• Adjustable deadrise compensation (2° to 22°) — automatically corrects beam angle to match your hull geometry — ensures vertical sound transmission and dead-accurate depth readings no matter your boat's bottom shape.
• No hull drilling required — mounts via adhesive bonding to the hull — protects structural integrity on trailered boats and keeps your warranty clean.
• Liquid-filled coupling base — sound travels more efficiently through liquid than air-filled designs — you get better signal strength and cleaner returns than traditional puck-type transducers.
• Twist-lock transducer head — quick-disconnect design lets you swap or service the transducer element without disturbing the hull-mounted base.
• Works on fiberglass, aluminum, and rigid inflatable hulls — proven across multiple hull types and boat categories.
• Humminbird 9-pin plug compatibility — connects directly to compatible Humminbird fish finders — confirms plug-and-play installation with your head unit.

Specs & What's Included

Compatibility: This transducer is designed for Humminbird fish finders with a 9-pin sonar port. Recommended for solid fiberglass hulls and aluminum hulls under 0.16 inches thick. Works on planing-hull power boats, trailered boats, rigid inflatable boats (RIBs), and racing sailboats up to 25 feet. Not sure if this works with your setup? Call or text us at (833) 831-4077 — we'll tell you straight.

What's Included: P79 in-hull transducer with Humminbird 9-pin plug, adjustable deadrise base, mounting hardware, and adhesive.