Fish,Finders,Work,Hard,Locate, sports Fish Finders Work Hard to Locate and Put You on Top of a Big
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Fish finders are the best tool to use so you can find and place yourboat on top of the fish. All fish finders use sonar to scan the water.A sound wave is sent from the fish finder through the water forming acone. When an object is detected, the fish finder measures the amountof time between when the sound wave was sent and when it bounced backto the unit and is displayed on the screen.If the sound wavedoes not detect anything it hits the bottom. Soft bottoms such as mudwill absorb the signal while hard bottoms like rock will reflect astronger signal and send it back. The small differences in reflectionsare displayed on the screen and this shows how the bottom is read.Coneangles are the measurement of the sonar beams in degrees. They aremeasured at "-10db" which is a way the measurement is consistent fromone transducer to another and to accurately represent the capability ofthe fish finder. Each manufacturer and fish finder model have differentcone angles. Humminbird uses an advanced multi-beam system that sends2, 3 or even 6 sonar beams while most of the other brands use 1 sonarbeam.Here is a quick reference chart for the covered area for aspecific cone angle. Example: If you are fishing at a 10 foot depth anda cone angle of 20 degrees, the area on the bottom is 3.5 feet.20degrees -0.35 or roughly 1/3 of depth 24 degrees -0.42 or roughly 2/5of depth 30 degrees -0.53 or roughly 1/2 of depth 40 degrees -0.72 orroughly 3/4 of depth 50 degrees -0.93 or roughly 9/10 of depth 60degrees -1.15 x depth 70 degrees -1.4 x depth 73 degrees -1.48 x depth80 degrees -1.68 x depth 90 degrees -2 x depth 100 degrees -2.38 xdepth 110 degrees -2.85 x depthFish targets will be displayed asa Fish ID symbol or an "arch" which is an unprocessed sonar return, thechoice will be yours. Fish ID symbols are determined from a suspendedshape being analyzed from the sonar beam to see if it is a fish. If afish is detected, it is seen on your display as a fish graphic. Archesare displayed from the characteristics of the sonar. Fish that passthrough the beam are seen as an arch on the screen. The sensitivitysetting of the unit, depth of water, boat speed and location of fishwill determine the size of the arch.Clarity of the water, strongwinds or currents can create air pockets and has a lot to do with theintegrity of the signal. Small mineral particles such as algae,plankton or other microorganisms can absorb the sound wave instead ofreflecting it back to the unit. The action of the waves will alsodetermine the amount of air in the equation and affect the reading.Transducersare mounted in the water on the inside of the hull, on the transom oron the trolling motor. From a cable connected from the transducer tothe fish finder, an electrical signal is taken from the transmitter andturns it into sonar. The transducer should always be mounted straightdown and away from motors or any other obstructions.There aretwo different types of display screens available. An LCD screen ismeasured in pixels which shows the sonar information. The more pixelsthere are the clarity of the image will be better. FSTN displaysprovide a high contrast image for easy reading that can be seen fromanywhere on the boat. They use grayscale technology that offers moredetail by showing the sonar image in different shade of gray which caneasily distinguish what the bottom is and what the fish are. Article Tags: Fish Finders, Sound Wave, Fish Finder
Fish,Finders,Work,Hard,Locate,