Furuno FAR-21 7-BB Series, Operator'S Manual

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1. RADAR OPERATION
1-48
The relationship between trail restart and trail copy depends on their status, as
shown in the table below.
Trail restart Trail copy Trail status
ON ON Range changed while trail is ON: Trails continue on
targets within previous range.
ON OFF Range changed while trail is ON: Trails within the
previous range are erased and then trails are restarted.
OFF OFF/ON
•
Range changed while trail is ON: New trails not
initiated. (Trails from previous range are stored in
memory.)
•
Range returned to previous range: Trails continues
on targets stored in memory.
•
Trails turned ON: Trails stored in memory are
erased. (See section 1.28.9.)
(Trails stored in the memory are erased and trails are
then initiated on new range.)
1.28.5 Trail level
The level (intensity) of the afterglow which extends from radar targets may be
chosen as below.
1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom
right corner of the screen.
2. Push the right button to display the TRAIL menu.
3. Roll the wheel to choose 4 TRAIL LEVEL and then push the wheel or the left
button.
4. Roll the wheel to choose level desired and then push the wheel or the left
button. The higher the number the greater the intensity of the afterglow.
5. Push the right button to close the menu.
1.28.6 Narrow trails (B, C and W types)
Target trails may be painted with thinner lines if desired. This can be useful when
there are a lot of targets on the screen.
1. Roll the trackball to place the arrow on the TRAIL MODE box at the bottom
right corner of the screen.
2. Push the right button to display the TRAIL menu.
3. Roll the wheel to choose 3 NARROW TRAIL and then push the wheel or the
left button.
4. Roll the wheel to choose OFF, 1 or 2 as appropriate and then push the wheel
or the left button. “2” is thinner than “1”.
5. Push the right button to close the menu.