Furuno FMD3100, Operator'S Manual, Page: 105 / 395

4-1
4. HOW TO CONTROL CHART
OBJECTS
This chapter provides the information necessary for controlling chart features.
4.1 How to Browse Your Charts
You can view your charts using different positions and different scales. The basic tools
for browsing charts are the scrollwheel, chart offcenter, and scroll.
The scrollwheel changes the chart scale. If true motion reset is active, ZOOM IN and
ZOOM OUT keep the relative position of your ship with respect to the display. If true
motion reset is off, ZOOM IN and ZOOM OUT keep the relative position pointed by the
cursor with respect to the display. The system automatically chooses next larger or
smaller scale. If a chart with larger compilation scale is available at your current view-
ing position, the message "Larger Scale ENC Available" appears.
The own ship position can be easily relocated to the screen center in the Navigation
voyage and Navigation planning modes. Further, in the Navigation voyage mode, the
own ship position can be put at the cursor position.
To move the own ship mark to the screen center , put the cursor in the chart area
and right click [Ship on center]. To move the own ship mark to a location , right-click
the position on the chart where to put the own ship mark then right click. ([Ship off cen-
ter] is not available in the Voyage planning mode.)
To scroll your chart , simply drag and drop.
4.2 How to Control Visibility of Chart Objects
The [Chart Display] menu has several pages of chart features that you may show or
hide as appropriate. To display this menu, click the [DISP], [SET] and [Chart DISP]
menu on the InstantAccess bar™.
4.2.1 How to set value for shallow contour, safety depth, safety con-
tour and deep contour
You can set values for Shallow Contour, Safety Depth, Safety Contour and Deep Con-
tour, on the [Chart Alert] dialog box (sequence: [DISP], [SET], [Chart Alert]). Colors
used for depth presentation on the electronic chart are controlled by setting values for
Shallow Contour, Safety Depth, Safety Contour and Deep Contour. Soundings on the
electronic chart, which are equal to or less than the value of Safety Depth, are high-
lighted. See the illustrations on the next page for multi-color presentation and two-col-
or presentation. Selection of multi- or two-color presentation can be done with [Four
Shades] on the [General] page of [Chart Display] menu. Check the check box for multi-
color; uncheck the box for two-color.
Note: The shallow contour cannot be set higher than the safety contour.