Specifications

FISH ARCHES

Fish arches are created when the cone of sound from the transducer

passes over a fish. The distance to a fish when the cone first strikes it is

shown as "A" below. When the center of the cone strikes the fish, the

distance is shorter as shown "B". As the cone leaves the fish, the

distance increases again as shown in "C".

When the Fish I.D. mode is off, the depth of the water will affect the size

and shape of the fish arch due to the cone angle diameter. For example,

if the cone passes over a fish in shallow water, the signal displayed on

the SupraPro I.D. may not arch at all. This is due to the narrow cone

diameter and the resolution limitations of the display.

Very small fish probably will not arch at all. Medium sized fish will show

a partial arch, or a shape similar to an arch if they’re in deep water.

Large fish will arch, but turn the sensitivity up in deeper water to see the

arch. Because of water conditions, such as heavy surface clutter,

thermoclines, high wind or wave conditions, etc., the sensitivity some-

times cannot be increased enough to get fish arches.

BOAT'S DIRECTION OF TRAVEL