Humminbird 678c HD DI Fishfinder

Overview Humminbird 678c HD DI Fishfinder

Humminbird 678c HD DI Fishfinder is a dedicated fishfinder built around a 5-inch display for a clearer view of what sits directly beneath the boat. The 640V x 480H (HD Color TFT) screen works with Down Imaging & DualBeam PLUS to make bottom contour, cover, and fish targets easier to interpret.

Humminbird 678c HD DI Fishfinder is aimed at anglers who want a compact sonar unit with strong bottom-reading performance rather than a more general navigation display. Features such as Clear and Max Modes Included and 250 ft (DI) / 600 ft (DualBeam PLUS) help keep the presentation readable across changing water conditions.

Key Features

• Display clarity: Uses a 5-inch display with 640V x 480H (HD Color TFT) so sonar, charts, and system data remain easier to read from the helm.
• Sonar capability: Down Imaging & DualBeam PLUS. Adds a tighter view below the hull for reading structure, edges, and bottom changes.
• Depth performance: 250 ft (DI) / 600 ft (DualBeam PLUS) shows the sonar range and conditions the model is intended to handle.
• Marine-ready construction: IPX7 Standards supports use in exposed marine environments.

Applications

This model is best suited to anglers who want a dedicated sonar screen for reading bottom contour, cover, and fish targets directly under the boat. It is particularly useful for jigging, structure fishing, and tracking depth transitions where Down Imaging can reveal details that standard sonar may blur together.

Its compact footprint also makes sense on smaller fishing boats where console space is limited but reliable bottom reading still matters.

Specifications

What’s Included

• Humminbird 678c HD DI Display Unit
• XNT-9-DI-T Transom-Mount Transducer
• Tilt and Swivel Quick Disconnect Mount
• Power Cable (6 ft)
• Transducer Mounting Hardware
• User Manual and Documentation Pack