NorthStar Navigation Echo Sounder NorthStar 491 - Manual (Page 36)

Page 32 491 Echo Sounder Operations Manual
Selecting the color bar (hue) and white level
Understanding the
color bar
The color bar displayed at the extreme left of the ECHO screen
shows the range of colors used to display different echo
strengths. Weaker echoes are displayed with colors near the
bottom of the scale, and stronger echoes are displayed with
colors near the top.
You can choose any one of nine palettes of colors to represent
the echo strengths from weakest to strongest.
• Color bar #1 is the one most often used.
• Color bar #2 is similar but with fewer colors, to aid visibil-
ity under some conditions.
• Color bars # 3-8 are additional variations with different
background colors.
• Color bar #9 uses only a single color, ranging from very
dark to very bright.
Selecting the color
bar (hue)
To select the color bar:
1. On the ECHO screen, press PICTURE.
2. Press HUE.
3. At the HUE AND WHITE LEVEL window, press the
CURSOR PAD left or right to select the color bar desired,
or use the KEYPAD to manually enter the number of the
color bar.