Screen Resolution
Screen Resolution means pixels density present in your display screen of the fish finder. If your screen has more pixel density per square inch, then it means that your screen has a high resolution. While on the other hand, if your screen has less pixel density, then it means that your screen has less resolution. With a 320 x 320 resolution, 320 dots are going left to right, and 320 dots going top to bottom in each column. Now it’s up to your choice which type of fish finder will suit you best.
CHIRP Fish Finder
CHIRP sonar is one of the modern technologies to come in the fish finders. Chirp transducers transmit longer sweeps across a range of frequencies such as 70-110kHz. This also helps to view the objects in water with better clarity and greater maximum depth. CHIRP fishfinders transmit a longer pulse than traditional sonar and put more energy into the water column.
Transducer
The most important part of any shallow water fish finder is the transducer. It is the component of the fish finder that sends and receives the sonar waves. These waves get processed into a picture on the display that you can see easily and also understand. Transducers come with different types of mounts. The easiest one to install is the transom mount. But, if you have a bigger boat or need something more serious, you can choose another type, like the thru-hull mount.
GPS Capabilities
The GPS on your fish finder gives you an overview of your location and helps you create waypoints and also mark fishing spots on your device then you can easily find the specific fishing area. The GPS allows you to mark points for return, download maps and underwater topography. Some also have Wi-Fi and Bluetooth connectivity and can connect to your mobile phone and other devices.
Frequency
Frequencies commonly used by a conventional fish finder for the recreational boat are 50 kHz (low frequency) and 200 kHz (high frequency). A lower frequency has a wider search angle and area. Lower frequency beams are suited for wide-area-search, and higher frequency beams are suited for narrow-area-search. Shallow-water inland anglers generally choose higher frequencies of 200kHz, 400kHz, or 800kHz.
Power
Power in the fish finder is also an important thing for easily finding the kinds of fishes in the water. If you want a unit that has faster and deeper readings, you want a high wattage unit. A device with lower wattage will be slower and much better in shallow water. When there is less power, the waves are slower, and the reading isn’t as reliable. When there is more power, the waves are much faster and they read out more accurately.