Raymarine i40 Depth Display System w/Thru-Hull Transducer

The Raymarine i40 Depth Display System w/Thru-Hull Transducer is a compact, reliable depth sounder built for boaters who demand real-time water column data without complexity. After years on the water, any angler or captain knows that accurate depth readings are non-negotiable—they separate productive fishing grounds from hazardous shallows. The i40 series delivers this essential intel in an instrument designed for straightforward operation and dependable performance, making it an ideal choice for recreational anglers, cruisers, and commercial operators seeking high-value marine electronics.

This depth display system integrates a thru-hull transducer that mounts directly through your hull, establishing a solid acoustic path for precise bottom tracking and water temperature data. The three-button control interface keeps operation intuitive—no menu diving required—while the extra-large digits ensure readout clarity even in bright sunlight or rough conditions. The thru-hull design eliminates the drift and performance inconsistencies common with transom-mounted alternatives, delivering stable readings whether you're running 2 knots or 25 knots, and across varying bottom compositions from mud to hard structure.

Boaters installing the i40 Depth Display System benefit most when operating in coastal, freshwater, or offshore environments where bottom awareness directly impacts safety and catch success. Installation requires a thru-hull penetration and integration with your vessel's power and data network; professional installation is recommended to ensure proper transducer alignment and housing seal integrity. Compact dimensions and lightweight construction (3.75 lbs) make the i40 a practical addition to helm spaces of all sizes, from center consoles and open boats to larger cruising vessels seeking auxiliary depth monitoring without dashboard clutter.