Fish Finder

Humminbird Helix 7 SI GPS Review

Humminbird is the most prominent and widely used brand of fish finder around the world. We’re presenting you different classes of fish finders featuring different specifications. These are meeting all the basic demands of the user groups. One of the popular models from Humminbird brand is Humminbird 409850-1 Helix 7 SI GPS Fishfinder. It comes up with chock full of alluring features like extra large screen, better viewing area, clarity of imaging with SwitchFire Sonar technology, extremely strong GPS technologies, and so on.

Moreover, this model can provide the best services regarding down imaging, side imaging, under water exploring. So, it’s time to have the complete follow up on this amazing device.

Here, in this article, you will get the complete ins and outs of Humminbird 409850-1 Helix 7 SI GPS and Fish Finder. If you are the beginner one and still over thinking the issue which one to choose from so many options of fish finders available in the market then you can also make a try with this Fish Finder.

So, don’t waste your time. Go through the article, and make yourself learned why this model is highly recommended for your uses.

Who is this product designed for?

Humminbird 409850-1 Helix 7 SI GPS is a very famous model of fish finder to the professional fishermen. This model also a useful one to the seasonal ones. Let’s have a check of the list.

  • Professional fishermen.
  • Amateur learners.
  • Pastime lovers.
  • Fishing loving people.
  • Seasonal fishers.
  • Restaurant owners.
  • Official chefs or cooks.


  • Ultra large screen.
  • Protective anti glare bonded glass formed display.
  • Faster operation of the fish finder.
  • Suitable for both salt water and fresh water operation.
  • Best option for noise free services in the shallower water regions.
  • In built transom transducer with temperature probe.


  • You need to purchase the mapping software separately for this unit.
  • Not connectable to other Humminbird products.

Some Key Features of Humminbird Helix 7 SI GPS Fish Finder

Before going for the details, first, lets get some knowledge about the basic features of this exclusive model. It comes with all the traditional features of a successful fishing unit like the built in GPS with Sonar features, chartplotting options to explore the down water along with some very own exclusive functions of this model. Let’s scroll downward and get a bit details of such amazing unit. You are surely going to love all of them.

Better Imaging

Humminbird 409850-1 Helix 7 SI GPS Fish Finder is capable to provide you the best combo of both the side imaging and also the down imaging. This combo is one of the biggest reasons of picking this unit from multiple choices. You can apply this tool as an angler and also as the fish or depth finder to explore what is happening beneath your boat under water. The users can have the view of the side imaging up to 100 feet of depth and the down imaging option features the depth range up to 600 feet. Moreover, you can also extend these ranges from their standard value up to around 1500 feet by using a simple XD transducer.

Thus, Humminbird Helix 7 SI GPS can ensure the biggest exploration range in the water for its users. This unit has the standard RMS output power of 500 Watt. It also ensures to provide the best and clear most images possible while fishing with relatively smaller noise and within a very limited budget.

Excellent Side Imaging

Humminbird 409850-1 Helix 7 SI GPS Fish Finder comes up with amazing side to side imaging process extended up to 180 degree and provides you the greater chances of exploring what is happing below the water surface beneath your boat. It works with side imaging sonar which offers the frequency of 455 kHz. The images presented by this feature are of a monochromatic type and three-dimensional in nature. So you can get the detailed information. Moreover, this function offers two different side beams, where each one covered angle up to 84 degree and depth of around 240 feet on the each of the sides.

Thus, the area up to 480 feet will be under your supervision with this feature. It’s possible to magnify some specific regions for your convenience with this feature. You can also mark some regions to show them up in the digital screen. You will not get such quality of side imaging while fishing with any other fish finders.

Strong GPS

Humminbird 409850-1 Helix 7 SI GPS Fish Finder provides the built in GPS features to its customers. It is equipped with internal precise GPS antenna along with the receiver. You can track all the routes, locations, hotspots, waypoints, and so on with this amazingly powerful GPS. The users can be able to store up to 2500 waypoints along with around 45 different routes with this precise GPS feature. You will also get an additional track plotting function being available with this device. Using this feature, you will be able to save up to 50 additional tracks and about 2000 numbers of waypoints. If you intend to know the speed of your boat, you can even find out the info with the use of the GPS function of the Humminbird Helix 7 SI GPS Fish Finder.

Smooth Down Imaging

Apart from the amazing side imaging feature of this device, Humminbird 409850-1 Helix 7 SI GPS Fish Finder also provides smooth down imaging option. This device uses the thin beam which is fan shaped and razor thin with the frequency of 455 kHz. When these thin shaped beams hit any object down the water, they immediately return to the XNT 9 SI 180 T type of transducer and thus produce the ultra bright images of the down water.

The images formed by this option are of three-dimensional as well and also monochromatic in nature like the side imaging option of this device. These images can carry the vegetations, location of the fishes, structure of the down surfaces, etc. You can get the view up to 600 feet while using this feature, but you can also upgrade the depth range as well. You can upgrade the range even up to 1500 feet.

SwitchFire Sonar

Humminbird 409850-1 Helix 7 SI GPS Fish Finder also provides the SwitchFire Sonar option to its customers. This function can operate with both the 83 kHz frequencies and 200 kHz frequencies. These beams of different leveled frequencies produce two dimensional and multi colored images presented at the display. You will get some additional information like depth of the watery regions, water temperature, etc. in the display. There are two modes available with this device-clear mode and the max mode. When you will use the clear mode, you will be able to get the images free from noise. Thus, this mode is perfect for fishing in the shallower regions. On the contrary, you will get the glimpse of water currents while using the max mode option of the SwitchFire Sonar feature.

Bonded Glass Formed Display

The display of Humminbird 409850-1 Helix 7 SI GPS Fish Finder is surely one of the best you have ever experienced so far. It has the display bonded with the glass cover. This additional feature of the display ensures better protection for the users’ eye and let them have a clearer view without any eye pain or strain. Moreover, you can also use this unit even in the direct sunlight as your view won’t get hampered because of the bonded glass cover. The screen is also of landscape design and you can get the full benefits of the split screen imaging option.

Ultra-large Screen Display

Humminbird 409850-1 Helix 7 SI GPS Fish Finder comes with the amazingly large and wider LED screen with an aspect ratio of 16:9. The screen resolution is 800 X 480 pixels and 256 colors are available in the screen. A LED backlight is also available with this display for providing the night time services to its users. The users can enjoy greater viewing area due to the ultra large screen of this device and get more detailed and more defined images of the bottom surface.

Upgraded Mounting System

Humminbird 409850-1 Helix 7 SI GPS Fish Finder is a user friendly device to use as it has an easier, but sturdier gimbal mounting bracket option for its users. It is a huge improvement considering of Humminbird Helix 7 SI GPS Fish Finder that might not be available for the traditional previous models of Humminbird branded fish finders. The users can easily install this unit as per their wishes. Moreover, the overall dimensions of this model are suitable one for using this item as a good portable option.

Comes with Upgraded Memory

One of the biggest reasons of choosing Humminbird 409850-1 Helix 7 SI GPS Fish Finder is its upgraded memory which is about to be the double of normal range. The mapping with this unit becomes easier due to this feature. Moreover, the refresh rate of the device also gets faster with such option. You can have the continuous displaying of the maps along with the real time images without facing any kind of hassle. There will be no problems of having the screen lag with such feature. This feature makes the Helix 7 SI GPS faster and more accurate unit than its precedent models of the same brand.

Selective FishID+ Sonar Features

Another useful and exclusive feature of Humminbird 409850-1 Helix 7 SI GPS Fish Finder is its selective FishID+ sonar features. This option uses the SwitchFire Sonar beam or the Dual Beam Sonar features of different frequencies and detects the fishes from different positions of the bottom surface. Then it provides a fish like sign to the returned sonar beam to the device. Thus you can easily locate the fish’s exact and accurate positions while it’s flying and thus can be able to catch them up easily during your fishing time.

UniMap Cartography

UniMap Cartography is a traditional feature that almost comes up with all the running models from Humminbird. Humminbird 409850-1 Helix 7 SI GPS Fish Finder is also equipped with this function. This function uses the GPS and provides the more detailed mapping of more waypoints and hotspots. This technology covers all the coastal lines of the USA border and also all the inland lakes within the border as well. It uses 30 meters per pixel rate of mapping for the chart plotting features.

Bird’s Eye View Function

Another exclusive option that you will get while using the Humminbird 409850-1 Helix 7 SI GPS Fish Finder is its Bird’s Eye View technology. It is actually operated by strong GPS system and provides the three dimensional views of your current location. You can also set your view point both the below surface of your boat and also to the above of your exact position as well. Thus, you can enhance the chances of getting more clarity in your view and makes the sure about great navigation as well.

Transom Transducer Mounting Body

Last but not the least feature of Humminbird 409850-1 Helix 7 SI GPS Fish Finder is its transom transducer mounted body. The model is XNT 9 SI 180 T. It operates with any frequencies like of 83, 200 or 455 kHz ranges. There is a built-in temperature probe comes along with this transducer. It helps to detect the temperature of the water surface. It also presents the data in the screen. Sometimes you might need to know the water temperature for making yourself sure about the exact position of the fishes’ species, vegetation, hotspots, and so on. This feature will help you in that state.


Will I get some additional information like boat speed or water temperature while using this unit?

Yes, you will. Humminbird 409850-1 Helix 7 SI GPS Fish Finder provides the additional info of boat speed, depth range, water temperature. Additionally, a lot more staffs for making the task more convenient to its users.

Will this unit be suitable for fishing in the shallower water regions?

Yes, surely this unit will be. Humminbird 409850-1 Helix 7 SI GPS Fish Finder provides the best noise-free service. This is one of the best options for fishing in the shallower water regions apart from the deeper ones.

Will this unit come with any other additional tools along with it?

Yes, it will. You will get the Helix 7 series unit cover and RAM mount along with this unit while purchasing.

Bottom words

If you are looking for any mid-ranged fish finder you can surely pick this Fish Finder without any single hesitation. This unit is one of the most effective and budget-friendly options. Enjoy your fishing time to its fullest with Humminbird 409850-1 Helix 7 SI GPS Fish Finder.