Raymarine Dragonfly-4 Pro Sonar/GPS with US C-Map Essentials Review

By Robert Johnson | Fish Finders

Raymarine Dragonfly-4 Pro Sonar/GPS with US C-Map Essentials

Raymarine Dragonfly 4 Pro 1

Rating: 3.9/5


Screen Resolution




• It is a standard fish finder that comes with high precision GPS

• It comes with a microSD slot

• It features integrated Wi-Fi


• The 4.3 screen is too small

• It does not have a built-in sonar recording



The new Raymarine Dragonfly-4 Pro Sonar comes with CHIRP and DownVision technology. It features GPS combo and a 4” screen that guarantees crisp-clear imaging and just everything that anglers look for in a finder.

Raymarine Dragonfly 4 Pro 2

The unit can suitably be used to fish in rivers, lakes, and oceans and gives the angler a chance to stream the sonar data to smartphones since it features a Wi-Fi app that allows the angler to rewind, save and share the day’s catch with friends on social media networks.

The unit is designed to change your underwater view and enables the angler to maximize his time fishing since it enables him to identify and differentiate fish and other objects underwater easily.

Main Usage

The Raymarine Dragonfly-4 Pro Sonar is a Dual Channel sonar that comes with a wide-spectrum CHIRP down sonar that guarantees photo like images as well as a CHIRP sonar channel that targets the fish.

The unit has an inbuilt Wi-Fi and comes with a C-MAP and combines GPS with the advanced dual-channel CHIRP sonar. The inbuilt Wi-Fi enables the angler to stream active sonar from their smartphone. The unit features a 4.3” standard CHIRP and is capable of a Downvision CHIRP of up to 900’. It also features internal C-Map Essentials and a coastal chat bundle.

Raymarine Dragonfly 4 Pro 4

Also, it includes lake navigation data such as navigation aids, marina icons, chart objects contours to about 60 feet, and sports soundings. The units display resolution is 480 x 272 WQVGA and works well on operating voltage of between 12- 15 V DC. The unit utilizes a standard IPX6 and IPX7 for waterproofing.

Product Features

Screen Resolution:

The Dragonfly 4PRO comes with a 4.3-inch LCD screen that provides images at 480 x 272 WQVGA. This is a high definition resolution that allows the angler to view images that are sharper and bright. It gives the angler a chance to view images from various angles. The unit can display 480 dots in each row from left to right and 272 dots in each column downward.

This is sufficient to enable the angler to see more details of the images of objects within the targeted area. It allows them to map the area with the type of fish they are interested in. When we put together the high screen resolution and the 4.3” screen, it gives the angler an upper hand, and it guarantees them a good catch.


The transmission power is a critical factor in a fish finder. The wattage of the finder determines how fast it can display the transmitted images. Dragonfly 4PRO boasts of a 500w RMS and 4000w peak to peak transmission power.

This makes it easy for the finder to receive the sonar waves, a thing that makes the reading much clearer. It makes the unit the best option for anglers planning to fish in shallow rivers and those planning to fish in deep waters. The finder can show reading up to 600 feet for both sonar and DownVision.

It means that the unit can be a good companion for anglers planning their trip to salt water bodies or those planning to visit great lakes.

Raymarine Dragonfly 4 Pro 3


A colored screen does not just allow for greater details but enables the angler to differentiate between the fish and other objects such as weeds. A fish finder with a colored screen enables you to see what is going on in the bed of the river or lake. The angler is also able to read it regardless of whether it is dark or cloudy.

The colored screen gives images that are brighter and sharper. If the screen is fog resistant, it makes it easier to read the screen even when the fog is heavy. Buying a finder with a huge colored screen will give you a clear picture of what is happening in the background and enables you to make decisions that guarantee you a bigger catch.


The Dragonfly 4PRO is equipped with the highly ranked sonar technology that is enjoyed by anglers. It a dual Channel CHIRP with frequencies of 50/200 kHz and 83/200 kHz. The unit emits beam pulses over multiple frequencies and results in images that are clearer. This unit emits 60-degree signals that create a monotone display.

Raymarine Dragonfly 4 Pro 5

The sonar can emit and receive signals that allow for the formation of images of objects found at a depth of 6000 feet. The angler can view and differentiate images of game fish, bait fish, terrain features, and vegetation.

The low frequencies of 50 and 83 kHz enables the angler to monitor everything that happens in deep water while the higher frequencies enable the angler to use the tool to map fish rich areas in shallow waters. The high frequencies allow more details to show up on the screen.


Transducers emit sonar waves which are signals that are sent into the water to help find the objects on the lake bed. About this, the Dragonfly 4PRO uses the CHIRP technology which transmits a wide spectrum of sonar signals into the water.

When the waves bounce off the objects under water, they are once more picked up by the transducers and translated into pictures that the angler can understand and use to make a decision.


If you are a full-time angler, you need a fish finder that can help you map out areas with the type of fish you are targeting. One of the devices that can help to show you all the underwater structures where the fish hide is the Dragonfly 4. 

The unit comes with a screen with very good resolution, has CHIRP sonars that are easy to install and use.

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