Interphase Tech U1-BBFF-DFN user manual Displaying the Fish Finder, How to select the Fish Finder

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.

Thermoclines

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.

Structures

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.

Other Elements

Large anchoring cables are returned by the echo sounder as very long and narrow arcs on the screen.

2.2DISPLAYING THE FISH FINDER PAGE

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.

NOTE The Fish Finder display page is available only if the Fish Finder is connected and powered On.

2.2.1How to select the Fish Finder page

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

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