Fishing Equipment and Accessories
Eagle Fishfinders & Depth Sounders
"EAGLE" Fishfinders - the highest quality accurate, easy to use and most importantly fishfinders , all of their sonar products from the basic Cuda 300 to the amazing 256-color 640Vx480H pixel and TFT display 640C FishMark provide top-performance and reliability while remaining affordable.
Eagle Fishfinders and Depth Sounders
For the past 25 years, Eagle has been the most popular brand within marine electronics in North America.
The company was established in 1982 and its products have, since the very beginning, been known as the most user friendly, safest and most reasonably priced alternative for the small boat market. Thanks to excellent technological standards and a focus on customer service, Eagle enjoys high customer satisfaction and loyalty.
Depthsounders use an electric signal generator, a piezo ceramic element, from which the transducer converts electrical energy into a high-frequency sound wave. This wave is then amplified and projected into the water. When this waveform strikes an object, it bounces off and sends a return waveform signal back to the transducer. There the returning sound echo is received, processed and sent on to the display for you to see.
The transducers frequency rating, cone angle and diameter all determine the maximum depth reading and beam width of the unit.
Frequency ratings are important in determining the unit you purchase. The more common frequencies found in recreational instruments are 192 and 50 kHz. The higher frequency (192 kHz) delivers a narrower beam and sharper detail but a lower maximum depth reading. The lower frequency (50 kHz) produces a broader beam and a higher maximum depth reading. If you operate primarily in shallow waters and fish, a higher frequency transducer will work for you.
If youre a coastal or offshore cruiser, consider the lower frequency transducers. There are dual frequency fish finders available for the serious fisherman.
Because of the loss of penetrating power in salt water, a lower frequency transducer makes sense if you boat primarily in salt water.
The cone angle of the transducer determines the beam width or coverage area. The wider the cone angle, the wider the area of coverage, but the less maximum depth penetration. Narrower cone angles offer a greater maximum depth reading. There is a correlation between the transducers frequency and cone angle. Generally, the higher frequency transducer produces a narrow cone angle, while the lower frequency transducer produces a wider angle.
The transducers diameter also plays a role in resulting beam width. High frequency transducer housings dont have to be as large as low frequency housings but the larger the housing becomes, the narrower the beam width and the greater the maximum depth penetration and the better the resolution. | craigmarine.info / Eagle