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A GPS fishfinder is a small radar that is used to “find fish.” Sonar uses sound waves to view objects underwater. A sound wave is shot out at an angle, which makes up a cone or beam of sound. Any object that falls within the cone bounces back the sound wave. The time it takes for the wave to leave the vessel, hit the object and reflect back is used to determine the position of the object. Software programs have been invented that determine if the object reflecting the sound is a fish or not. The sonar’s detection is displayed on a screen that gives the person fishing an approximation of their aquatic prey. Fishfinders are not perfect, and though their technology has been vastly improved over the years, there are still variables in the fish finding equation. Water clarity plays a large role in the effectiveness of the sound wave. Not the amount of murkiness in the body of water but the presence of winds and currents. They can create bubbles that disrupt and disperse the signal, creating misreads. Algae and other microorganisms found in water absorb the sonar waves rather than reflect them. Waves can also distort the sound waves.
The fishfinding business is a booming enterprise that has several levels of radars. Like other electronic equipment, there are high end to low end devices meant for certain operations, differing greatly in price and capabilities.
The Furuno FCV1150 is one of the nicer fishfinders around. With a color digital display and high tech functions, it is designed with the professional fisher in mind. The radar uses a wide range of frequencies from 28 to 200 kHz to approximate fish. It auto synchs frequencies with a tranducer but can be manually adjusted to reduce interference from other radars. This particular radar is ideal for finding multiple species of fish. The FCV 1150 has a 30% faster sound transmission rate. This increases the accuracy and detail of sonar read outs. These functions make it a high end model that costs a pretty penny.
The mid range Hummingbird 700 series is made for the weekend warrior. It uses a 640Vx640H pixel 5” color screen to display its detections. It comes with custom programmable viewing options for easy switching. The personalization functions make the fishfinder a great tool for catching different species of fish. This radar also has the ability to be synched to a GPS system.
The Cuda 300 is a low end model but does plenty of work for its inexpensive price. It has a sunlight viewable 240Vx160H pixel 4” LCD display. The transducer runs at 200kHz giving it the ability to detect depths up to 600’. It also has a Fish ID and Fish Track modes to help find the ultimate catch.
The fishfinder device has become an essential tool for the serious fisher. Depending on the vessel used and the time spent chasing down a catch is correlated to the model needed. A specialty store that works solely in fishfinders and similar technology will help determine the appropriate system to purchase.
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