Overview

The Attwood Marine 11477-3 is a 12-volt hidden horn for remote mounting below deck, behind the dash, or behind the console. It produces a 105 dB signal and uses a compact horn body that measures 3 inches long x 3 1/4 inches wide x 1 3/4 inches deep, which helps when space is tight behind the helm.

This setup works well when you need an audible signal but do not want a surface-mounted horn visible on the console. It meets ABYC standards for boats up to 16.4 ft. (5 m) and USCG standards for boats up to 39.4 ft. (12 m), so it covers a wide range of small and mid-size recreational boats running on 12V DC systems.

Key features

• 12V DC operation only for boats wired on a 12-volt system
• 105 dB horn output for an audible signal on board
• Remote-mount layout for installation below deck, behind the dash, or behind the console
• Compact horn size at 3 in. x 3 1/4 in. x 1 3/4 in. for tighter helm and console spaces
• Meets ABYC standards for boats up to 16.4 ft. (5 m)
• Meets USCG standards for boats up to 39.4 ft. (12 m)

Compatibility and fit

This horn is meant for 12V DC electrical systems only. Before ordering, the main checks are available mounting space behind the chosen panel or console area and whether your boat falls within the applicable compliance range for your build and use.

The hidden-mount format makes sense on center consoles, runabouts, skiffs, and other boats where helm space is limited or where a cleaner dash layout matters. Its small footprint can also help when working around steering, wiring, and instrument space behind the panel.

Installation and setup

The horn can be mounted below deck, behind the dash, or behind the console, which gives more freedom than a face-mounted horn when laying out the helm. This can make refits easier on boats where the visible panel area is already crowded with switches, gauges, and electronics.

Because the horn is mounted out of sight, it is a good match for owners who want the signaling device onboard without changing the look of the helm. It also suits replacements where an older hidden horn is being swapped into the same general mounting area on a 12-volt boat.

Use on board

This model fits boaters who need a compact electric horn for day boats, small cruisers, and similar vessels that require an audible signal and have limited room at the helm. It is especially relevant when the goal is to keep the console face uncluttered while still meeting the basic horn requirement for the boat’s size range.