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4. SLANT MODE
4-36
Plotting an event mark on the display is equivalent to dropping a buoy with an
anchoring chain that extends from surface to bottom. The buoy is fixed at its
geographical location, but the marker on the display moves to a point where
present beam plane intersects the anchor chain of the buoy as ship moves or
the tilt angle is changed. This can be said about marks as well such as fish mark
and trackball mark.
(35)
Stored when
EVENT key is
pressed.
A
B
You observe picture from
direction of mark.
Event mark description
4.18.2 Entering an own ship position mark
Place the trackball mark close to the center of the own ship mark and press the
[EVENT] key. Ten own ship position marks may be inscribed. When the capacity
for own ship position marks is reached the earliest own ship position mark is
automatically erased.
4.18.3 Deleting an event mark, own ship position mark
Event marks and own ship position marks can be deleted individually with the
[DELETE MARK] key or by earliest entry through the menu.
Deleting event marks, own ship position mark with the [DELETE MARK] key
Use the trackball to place the trackball mark on the event mark or own ship
position mark you want to erase. The color of the mark changes from white to
red when the mark is correctly selected. Press the [DELETE MARK] key to
delete the mark.