Humminbird 859ci HD DI Review

The humminbird 859ci HD di is an affordable fish finder that offers complete simplicity when it comes to use. It is large and easy to read, whilst setting it up can be done in just a couple of minutes.

Useful features such as GPS and twin SD card slots for memory expansion makes this a handy device to take on a fishing trip, and you can be sure of complete reliability too. Although it works best as a standalone device, as long as you don’t plan on creating a network of fish finders, this device will be perfectly sufficient for your needs.

This Humminbird 859ci HD di review will highlight some of the best features that you can expect form this great fish finder.


Humminbird 859ci HD DI ReviewAffordability

If you’re looking for a fish finder that has everything you need at a price that you can afford, then the humminbird 859ci HD di has it all. You can be sure of complete reliability and durability when you purchase this device too, so it’s a worthwhile buy in the long term too.

Ease Of Use And Screen

The viewing screen on this fish finder is much better than most of the comparable models of fish finder on the market. When you have a limited budget, you will probably have seen some of the highly pixelated screens that come with some of the other fish finders. Unlike the others, the humminbird 859ci HD di has a high definition display that is easy to read and aesthetically pleasing too. Whilst the 800×480 screen still isn’t anywhere near as impressive as your iPhone may be, it can offer you a far better user experience than some of the alternatives. For fish finding, this unit is one of the best for viewing.

Another great thing about the screen on this fish finder is that it reduces the glare from the sun as much as possible. This means that even if you’re out on a really sunny day, you will be able to view the display of this device.

Humminbird 859ci HD DI sonarAccuracy

Which fish finder would be reliable if it couldn’t find any fish? Whilst many fish finders have many other features in addition to fish finding, the fundamental function of this device should be to help you to find fish accurately and reliably. Luckily, the Humminbird 859ci HD di offers great fish finding capabilities with good accuracy too.

When you purchase your Humminbird 859ci HD di, you will notice that it comes with a transducer. This transducer offers a precision beam. This beam is cone shaped and has a 20-degree view. You can also use the wider beam for finding schools or to search over a wider area. This wider beam is set at 60 degrees and is useful and accurate. This feature allows you to find a large group of fish and then allows you to position your boat at an angle so that you can catch the fish with ease.

You should be careful however as this fish finder is not great with fish that are within about 5 feet of the surface of the water. If you’re fishing in shallower water, or if your fishing for schools that congregate towards the surface, you may miss out on the catch due to this limitation.


Humminbird 859ci HD DI controlsDepth

This fish finder is powerful enough to detect fish that are around 600 feet away from the finder. This is in optimum conditions however, so you should remember that if you are in particularly adverse conditions, you might not experience such a good depth.

If you are using this fish finder for freshwater fish, then it is very rare that you would ever need a depth of more than about 200 feet anyway, so this fish finder should be suitable for many user’s needs.

You will get an accurate scan of the water when you are travelling at speeds of up to 15 mph in your boat, but if you travel any faster than that, you will find that the finder’s performance starts to deteriorate.


  • A 20-degree precision beam and a 60-degree wider beam allow you to search as accurately as you need to.
  • You can search for fish that are up to 600 feet deep in the water, which is more than sufficient if you are fishing in fresh water.
  • Simple use and easy to see screen makes this a user-friendly device that is great for taking with you on fishing trips.


  • This fish finder is not all that good at finding fish that are very close to the surface. As it is in the more affordable price range, this is one of the features that you may miss out on if you choose this fish finder.



This fish finder is one of the best that you can find on the market. The depth and the range of the transducer beam are perfect for finding fish with all the accuracy that you need. The viewing screen is also much better than most of the competitor’s fish finders and you’ll be impressed at what you can buy for your budget.

It’s best to place the transducer of this fish finder on the hull of your boat for the best results so that you can still see what’s lurking beneath the waves when you’re on the move.

We hope that you have found this Humminbird 859ci hd di review to have been helpful in your search for the best fish finder for your needs.