Fish Depth Finder
A fish depth finder is a high tech device that’s used to help fisherman find the best places to make a catch. Once a great tool for professionals who needed an extra bit of help when earning their keep, fish finders are now in use commercially by sports fisherman all over the world.
These affordable tools give an angler such an advantage that even those who go fishing only as an occasional hobby keep this type of device on hand in their tackle box.
Fishfinders come in Various Shapes and Sizes
From the commercial marine sonar locators with the looks a large advanced computer, to a device as small as a cell phone and most anything in-between.
The best fish finder is the one that actually helps you catch more fish, complements and helps to improve your fishing technique.
A casual fisher might have little need for all the perks associated with higher end models. Still there are general rules a good fish depth finder must meet.
Apperance and Use
The fish depth finders we’re after can be as small as a cell phone and fit in a pocket, but also fairly large systems that operate as fully functional GPS chart plotters. In turn, they can cost anywhere from thirty to forty bucks all the way up to hundreds of dollars.
It all depends on what the you want to use it for, and just exactly how detailed he or she wants the results. Budget restraints, a casual fisher wouldn’t have much need for all the perks associated with higher end models.
The Fish Finder Looks
Fish finders these days actually look like little hand held video game systems. They normally have large digital displays that show the user the needed information. In lower end models the display would look old fashioned and monotone while the better ones are full color; though, the type of display doesn’t really reflect too much on the quality and practicality of the device in any way.
More About Using Your Fish Locator
With a fish finder,you will quickly acquire a lot of useful information about the area you’re fishing in.
First of all, this tool will show the depth of the water, the structure of the bottom and anything floating or swimming in-between.
Fish usually displayed on the screen generally as discolored areas, indicating there is something there. When you have a gps fish finder all is displayed on a chart and often an actual map, which makes it possible to translate the blips on the screen into actual fish locations in the water.
How and why the Fish Depth Finder Works
The principle on which a fish finder operates is pretty simple. In fact the fish depth finder is nothing more or less than an active sonar device. The system relies on an echoing device that transmits a sound wave into the water and a receiver to pick up the echo or reflection.
The fancy name for this transmission and receiving unit is transducer. The quality of the transducer determines in fact the maximum resolution and viewing angle your system will allow. You hear a lot about single beam, dual beam, triple or combo beam systems. Find out more about this topic our “What is a Transducer” article.
Sophisticated software computes the time differences between the incoming echoes and draws up a map of the underwater world beneath the boat. That way it’s possible to measure depth, the speed of the boat in relation to the bottom, water temperatures and objects floating around in the water. So we are now able to actually spot fish underwater.
This sounds very simple but it’s only because of developments in computer technology fish depth finders became really useful additions for the amateur fisherman.
The problem with “phantom” images had to be solved and with the addition of GPS to the device you can constantly track actual bottom conditions to charted bottom imagery and so filter out another source of interference.
It’s important to remember that even the most advanced fish depth finder isn’t the simplest tool to work with. Most people will need to spend some time with the instruction manual or, better yet, with an experienced user so as to be able to take what they find on the display and turn it into useful information for their day’s fishing.