Raymarine CPT-DV Transom Mount Transducer, For Dragonfly 4DV/5DV and WiFish, DownVision, Depth and Temperature, 4m Cable

Overview

The Raymarine R70373 is a CPT-DV transom mount transducer for Raymarine Dragonfly 4DV and WiFish sonar setups. It supports DownVision imaging with an ultra-wide fan-shaped beam, giving anglers and small-boat operators a wider look at bottom structure, fish-holding cover, and depth changes directly below the hull.

This transducer also returns depth and water temperature, so it is useful as both an imaging sensor and a basic situational tool for fishing, cruising, and shallow-water navigation. The 4 m cable, equal to 13.1 ft, gives enough reach for many transom-to-display installations on small boats, skiffs, tenders, and trailerable fishing vessels.

Key features

• CPT-DV transducer format for DownVision imaging on compatible Raymarine Dragonfly 4DV and WiFish systems.
• Transom mount configuration suits outboard boats, small fishing craft, and other hulls where a stern-mounted transducer is the practical choice.
• Ultra-wide fan-shaped beam helps show a broad DownVision view of bottom detail and underwater structure.
• Depth and water temperature sensing keep core sonar information available from one transducer.
• 4 m cable, equal to 13.1 ft, helps with clean routing from the stern to the connected display or sonar unit.
• Speed sensing is not included, which helps buyers confirm this is the correct replacement when speed-through-water data is not required from the transducer.

Installation and setup

The transom mount style places the transducer at the stern, where it can keep contact with clean water flow when installed at the proper height and angle. This matters most on planing hulls and trailerable boats, where turbulence, strakes, and prop wash can affect sonar readings if the sensor is placed poorly.

Before mounting, plan the cable route from the transom to the display location and confirm that the 4 m cable length works for the boat. Leave enough service loop for steering movement, tilt, and routine access, while keeping the cable protected from sharp edges, heat, and areas where gear may crush or pull on it.

Compatibility and fit

This unit is a match for installations using Raymarine Dragonfly 4DV or WiFish equipment that calls for a CPT-DV transom transducer. It is a good replacement choice when the existing system uses DownVision imaging and the owner needs depth and temperature data without changing the display.

For refits, confirm the display model, connector style, and cable path before installation. This is especially important on older boats or mixed electronics setups where previous owners may have changed sonar hardware or used adapter cables.

Use cases on board

The R70373 suits boaters who want DownVision detail for fishing ledges, rocks, wreck edges, weed lines, and bottom transitions from a compact transom-mounted package. It also works well for small-boat cruising where the operator wants clear bottom awareness and temperature readings without adding a through-hull sensor.

It is most relevant for owners maintaining or refreshing a compatible Raymarine Dragonfly or WiFish setup, rather than building a new networked electronics system from scratch.