Furuno NAVNET TZ2 TZTL12F Operator's Manual page 241

7. FISH FINDER (SOUNDER)
[Bottom Range Shift Area]: Select the area where to show the bottom echo, when
[Auto Range] is active. For example, setting 75% would place the bottom echo at a
position equivalent to 75% from the top of the screen.
[Heaving Correction]: Turn to apply heaving correction, to stabilize the picture in
heavy seas.
Note: [Heaving Correction] requires connection of a Satellite Compass
sensor configuration (see section 3.5 of the Installation Manual). This function is inop-
erative without a Satellite Compass
[Transmit Rate Mode]: Select the transmission rate selection method. [Auto] sets the
rate according to ship's speed. Select [Manual] to set the rate manually.
[Transmit Rate Manual]: Change the TX pulse repetition rate in 21 levels (21 is high-
est power.). Use 20 in normal use. Lower the TX rate in shallow waters to prevent the
second reflection echo.
[Fish Finder Transmit]: Turn fish finder transmission on or off.
Fish Finder initial setup
[Zero Line Rejection]: Turn the zero line (transmission line) on or off. When turned
on, the transmission line disappears, which allows you to better watch fish echoes
near the surface. The length of the transmission line changes with transducer used
and installation characteristics.
Note: If the fish finder source is [DFF3], adjust [Zero Line Range] (below) to set the
area where to reject the zero line.
7-22
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TZTL15F
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and motion