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3. ADVANCED SONAR OPERATION
3-6
Note 3: Each time the [FISH] key is pressed the fish mark changes in the
sequence shown below. Maximum 10 fish marks may be inscribed, one
latest, one 2
nd
latest and eight past.
Fish key pressed once:
Fish key pressed twice:
Fish key pressed three times:
Fish key pressed four times:
X
X X
3.4.2 Deleting individual fish marks
To delete specific fish marks, use the [DELETE MARK] key as shown below. To
delete fish marks collectively, see paragraph 3.7.
1. Operate the trackball to place the trackball mark on the fish mark you want to
delete. The color of the fish mark changes from white to red if the trackball
mark is correctly placed.
2. Press the [DELETE MARK] key to delete the fish mark.
3.5 Relocating Fish School for Easy Observation
1. Operate the trackball to place the trackball mark on the position where you
want to relocate the own ship mark.
2. Press the [OFF CENTER] key.
3. To return the own ship mark back to the screen center, press the [OFF
CENTER] key again.
Fish School
Fish School
Press
[OFF CENTER]
key.
Own Ship
Mark
Trackball
Mark
How to use the off-center function