User manual EAGLE FISH ID 2 ADDITIONAL INSTRUCTIONS

[. . . ] Also 3 3 4 7 7 10 10 11 CHARTSPEED RANGE ZOOM DIGITAL FISH I. D. FEATURE AUTO ALARMS called "gain". SCROLL SPEED - See CHARTSPEED. CHARTALARM FISH ALARM SPEAKER LIGHT MODE TRANSDUCERS AND CONE ANGLES SIGNAL INTERPRETATION FISH ARCHES WATERTEMPERATURE AND THERMOCLINES SURVEYING A LAKE BAIT FISH HOWTO OBTAINSERVICE SPECIFICATIONS GLOSSARY 12 13 13 14 15 15 15 16 the hull. SHOOT-ThROUGH-HULL A transducerinstallation which allowsthe sonar signalsto pass through a fiberglasshull withoutcuffing a hole in SUPPRESSION - A method used in some sonar units to help eliminate interference or noise. 20 21 21 SURFACECLARITY CONTROL - Reduces or eliminates undesirable signals displayed near the water's surface. Also called "SCC". 23 24 25 25 26 26 THERMOCLINE A layerof watercaused by the meeting of warmand cool layers of water. The thermocline provides the temperature most fish prefer. TRANSDUCER - The element of a sonar system that converts the electrical energy from the transmitter into ultrasonic sound waves. [. . . ] Layers of different temperatures form, and the junction of a warm and cool layer of water is called a thermocline. The depth and thickness ofthe thermocline can vary with the seasonor time of day. Thermoclines are important to fishermen because they are areas where fish are active. Many times bait fish will be above the thermocline while larger game fish will suspend in or just below it. Plus can detectthis invisible layer in the water, butthesensitivity will probably have to be turned up to see it. SURVEYING A LAKE The most successful anglers on any body of water are those who fish it day afterday and year after year. Fish are cold blooded and their bodies are always the temperatureof the surrounding water. At this time, they need about a fourth as muchfood as they consume in the summer. Most fish don't spawn unless the water temperature is within rather narrow limits. Plus helps identifythedesiredsurface waterspawning temperaturesfor various species. Bass and otherfish eventuallydie outwhen stocked in lakes that remain toocold duringthe summer. While some fish have a wider temperature tolerancethan others, each has a certain range within which it tries to TheFish l. D. has five different"screens" or modes of [1&i]111j eration. If the automaticfeature is off and the bottom signal narrows , then it means that you have moved over a mud bottom. Big rocks or stumps on a smooth bottom send back signals above the bottom level signal. As you pass over a post, it should be clearly visible as a short line extending above the bottom signal. A steep slope returns a wide signal, the steeperthe wider. Signals returned from a high underwater cliff are usually the widest of all. Brush usually lies on the bottom and shows up as clumpsrising above the bottom signal. Brush signals look similarto large rocks; however Remember, when the unit's automatic feature is on, the receiver'ssensitivity automatically adjuststo thesurrounding conditions. The microcomputerplaces it at a level slightlyabovetheminimum required to pick up the bottom signal. However, ft's possible to change the sensitivity level whilethe unit is in automatic. Thismaybe desirableif the sensitivity level is not high enoughto showfish or other small detail. The unit will increase the sensitivity to pick up the bottom signal, then add in the level you programmed. their signal is not as strong as rock. FISH ARCHES Fish arches are created when the cone of sound passesover a fish. The distance to a fish when the cone first strikes ft is shownas "A" on the next page. When the center of the cone strikes the fish, the distance is shorter, as shown in "B". As the cone leaves the fish, the distanceincreases again as shown in "C". [. . . ] Thesensitivity and range are also adjusted to keepthe bottom signal on the screen at all times. The word "AUTO" will disappear from the display, signifying the automaticsensitivity and chart range features are off. This will reset the sensitivity, so you may wish to increase it to see fish or other detail. key to turn it on. j-- FI1 701 T_···· iti. r, j Li 'in' -it' AUTO r 'C 2- Fish 1. 0. [. . . ]