Operation Manual

Simrad SH80
92
850-164385 / Rev.C
Colour Threshold
The Colour Threshold button is located on the Display menu.
The Colour Threshold function is used to reduce the number of
echo colours on the display.
The strength of the echoes is indicated with a scale of 16 or 64
colours. A weak echo has a cold colour (blue), medium echoes
have warmer colours (green, yellow) and strong echoes are
shown with the warmest colours (orange, red). If desired, the
number of colours may be reduced. When you do this, the sonar
witll start with the colour indicating the weakest echoes.
Therefore, by reducing colours, the maximum detection range
will be reduced, because all echoes will normally appear as
weak echoes at long ranges.