Simrad SN90, Operator'S Manual

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Choosing the colours used to present the echoes
Several different colour scales are predefined and available for the presentation of the
echoes. You can easily choose which colours to use. The presentation colours have no
effect on the operational performance of the SN90.
Context
Which colour scale to use is mainly a personal preference based on ambient light
conditions, the nature of the echoes and your own experience. Keep in mind that in the
basic scale with 12 colours, each discrete colour represents a 3 dB range of echo signal
strength. This implies that the next colour is selected every time the echo strength is
doubled. If you choose to use many colours, the resolution of the SN90 presentation
is greatly improved. It is then easier to distinguish the difference between the various
echoes of different size and/or target strength.
The
Smooth Echosounder
scale is based on the standard 12-colour scale. Additional
colours have been added between them to make smoother colour transitions.
Procedure
1 Open the
Display
menu.
2 Select
Colour Setup
.
Observe that the
Colour Setup
dialog box opens.
3 Under
Echo Colours
, choose the colour scale you want to use.
4 Under
Colour Brightness
, choose how intense you want these colours to appear.
5 At the bottom of the dialog box, select
Apply
to preview your choice(s).
6 Select
OK
to save the selected setting and close the dialog box.
Related topics
Defining settings related to user preferences and individual customizing, page 102
Selecting measurement units
The SN90 is prepared to work with several international standards for units of
measurements. From the
Units
page you control which units of measurements that are
used.
Context
The SN90 user interface presents many measurements. These measurements are for
example related to depth, range and distance. Use the
Units
options to select the units of
measurements you want to work with. The SN90 uses them in all presentations. You
only need to define them once.
Operating procedures