Eagle Electronics FISHMARK 640C - Manual (Page 71)

65
NOTE:
The sonar's depth capability depends on the transducer installa-
tion, water and bottom conditions and other factors.
FasTrack

This feature automatically converts all echoes to short horizontal lines
on the display's far right side. The graph on the rest of the screen con-
tinues to operate normally. FasTrack gives you a rapid update of condi-
tions directly under the boat. This makes it useful for ice fishing or
when you're fishing at anchor. When the boat is not moving, fish sig-
nals are long, drawn out lines on a normal chart display. FasTrack con-
verts the graph to a vertical bar graph that, with practice, makes a use-
ful addition to fishing at a stationary location.
Sonar Page showing FasTrack.
Fish I.D.
 (Fish Symbols & Depths)
The Fish I.D. feature identifies targets that meet certain conditions as
fish. The microcomputer analyzes all echoes and eliminates surface
clutter, thermoclines and other signals that are undesirable. In most
instances remaining targets are fish. The Fish I.D. feature displays fish
symbols on the screen in place of the actual fish echoes.
Structure
Bottom signal
Fish arches
In FasTrack, fish
arches show as
horizontal bars.
FasTrack
bar graph
ColorLine

Surface clutter