Does your fish finder lie to you?

[TubeDude]

[cool][#0000ff]The information provided with the Humminbird 565 says that the "footprint" of a 20 degree transducer is about 1/3 the depth. So, in 15 feet of water you would be seeing an area of about 5 feet in diameter on the bottom...less at mid-depth.[/#0000ff]
[#0000ff][/#0000ff]
[#0000ff]That was one of the factors that appealed to me about their dual beam transducer. It also shows a 60 degree cone...to show fish that are not in the 20 degree beam but are still in the area. Not as good as a sidefinder for determining location but good to help you understand the cruising depth of fish in the area.[/#0000ff]
[signature]