What is a Fish Arch?

type="text/javascript">transducer and the fish while the boat moves
If you are new to reading a fish finder it might beover the fish.
a little difficult to interpret what you see on theWhen the fish enters the outer boundary of the
screen and whether or not there are fish wherecone, pixels on the fish finder’s display
your fish finder is looking.are activated. As the fish moves closer to the
If the boat is moving, usually at a slow speed, thecenter line, the distance between the transducer
classic “Fish Arch” will be on theand the fish decreases. The decreasing distance
screen. A Fish Arch looks just like an arch, hencecauses pixels representing shallower water to be
its name. The next question is generally,activated thereby causing a slightly curved line.
“Why do fish look like an arch on theWhen the fish is directly on the center line of the
display?” The reason for the shape is thecone, the first half of the fish arch is completed.
interaction between the cone angle of the