Interphase Tech U1-BBFF-DFN Manuel D’Utilisation

fish, causing a display pixel to be turned on. As the boat passes over the fish,

the distance to the fish decreases turning each pixel on at a shallower depth

on the display. When the boat is directly over the fish, the first half of the arch

is formed and since the fish is closer to the boat, the signal is stronger and

the arch is thicker. As the boat moves away from the fish, the distance in-

creases and the pixels appear at progressively deeper depths forming the

remaining half of the arch.

Are the zones where two layers of different water temperatures meet. The

greater the temperature differential, the thicker the thermocline is shown on

the screen. Thermoclines are represented as horizontal stripes of noise. They

are very important for fishing since often many species of game fish like to

suspend in, just above, or just below the thermoclines.

 White Line

The White Line shows the difference between hard, soft bottoms and even

distinguishes between fish and structures located near the bottom. In this

way it is easier to tell the difference between a hard and soft bottom and even

to distinguish fish and structures located nearby the bottom. For example, a

soft, muddy or weedy bottom returns a weaker echo that is shown with a

narrow white line while a hard bottom returns a strong echo that causes a

wide white bottom line.

 Surface Clutter

Appears like noise at the top of the screen extending many feet below the

surface. It’s caused by many things, including air bubbles, bait fish, plankton

and algae.

Generally, the term “structure” is used to identify objects like wrecks and

weeds rising from the bottom.

 Bottom Echo Profile

Bottom profile recorded by the Fish Finder. When the echo sounder is set in

auto-range mode it is automatically kept in the lower half of the screen.

Large anchoring cables are returned by the echo sounder as very long and narrow

arcs on the screen.

This section will take you through the frequently used operations and assist you

to customize the look of the chart plotter using the Fish Finder.

The Page Selection menu allows you to change the Fish Finder page displayed. To

access this menu: