Furuno GP-1670, Operator'S Manual

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1. OPERATIONAL OVERVIEW
1-18
1.9 Display Range
You can change the chart scale to change the amount of information shown, or zoom
in or out at the location you select, in the plotter and steering displays. The selected
chart scale appears at the bottom right-hand position on the screen.
The horizontal range is available among 0.5, 1.0, 2.0, 5, 10,
20, 50 and 100 nautical miles.
To select a display range, rotate the RotoKey
TM
. clockwise
to decrease the range; counterclockwise to increase the
range.
1.10 Orientation Mode
The chart can be shown in head-up, north-up, course-
up and auto course-up. Select an orientation mode
from the RotoKey menu: Select [Mode] followed by
[Head Up], [North Up], [Course Up] or [Auto Course
Up]. The selected mode appears at the top right-hand
position.
Description of orientation modes
Head-up : Displays the chart with the current compass heading of your vessel at the
top of the screen. The heading data from a compass is required. When the heading
changes, the boat icon remains fixed, and the chart picture rotates according to head-
ing.
North-up : North is at the top of the screen. When your heading changes, the boat icon
moves according to heading. This mode is for long-range navigation.
Course-up : The chart picture is stabilized, and shown with your current course (over
ground) at the top of the screen. The boat icon moves with the heading. If you select
a new course, the picture resets to display the new course at the top of the screen.
Range scale
20 NM
Orientation mode
GPS 3D
PT00001
5 NM