Re: Buying a Fishfinder
A couple of points. First you should know Lowrance and Eagle are the same company.
Also you can go to Lowrance and Eagle web sites and down load a emulator that will run on you PC. Basicly you run the unit with you mouse instead of your finger.
http://www.lowrance.com/Software/PCSoftware/demos.asp
http://www.eaglegps.com/Downloads/Emulators/default.htm
Vertical resoultion very important in deep water but if your fishing 15 to 30 feet for Bass, Crappie and trout you will not see the difference.
Deep water and Salt water Power is very important but lower power actualy works as Good or better in Shallow water.
Standard Transducer cone angle for 200 KHZ units is 20 degrees. This means if fishing 10 feet deep transducer will cover about 3.3 foot circle right under the transducer. If fishing 30 feet you will see about a 10 foot circle right under the transducer. Basicly take the water depth and devide by 3 and that will tell you how big a circle under the Transducer you are looking at.
What under your Transducer will be displayed in the right most vertical row of you LCD Screen. It is then moved one row to the left and a new ping will again show what under the transducer in the right most vertical row.
Fish finder most usefull for finding structure. It will also show fish if you turn up the sensitivity but I do not think I ever caught a fish straight down from the back of the boat.
Lowrance and Eagle I think the best in shallow water. Saltwater over 300 feet then I would look at Furuno and Garmin.
Lowrance web site has a good Tutoral about how fish finder work that you may like to check out.
http://www.lowrance.com/Tutorials/Sonar/sonar_tutorial_01.asp
My 1985 Lowrance unit works as good today as the day it was new so take your time get the unit you want and consider spending a little more to get the unit you really want. Color? Point being if you take care of your unit you will have it for a very long time.