GP1670F_1870F Operator's Manual - Furuno USA

1. OPERATIONAL OVERVIEW1.9 Display RangeYou can change the chart scale to change the amount of informationshown, or zoom in or out at the location you select,in the plotter and steering displays. The selected chart scaleappears at the bottom right-hand position on the screen. Theavailable ranges depends on latitude and chart area.To select a display range, rotate the RotoKey TM . Clockwiseto increase the range; counterclockwise to decrease therange.20 NMRange scale1.10 Orientation ModeThe chart can be shown in head-up, north-up, courseupand auto course-up. Select an orientation modefrom the RotoKey menu: Select [Mode] followed by[Head Up], [North Up], [Course Up] or [Auto CourseUp]. The selected mode appears at the top right-handposition.Description of orientation modesGPS 3DOrientation modeHead-up: Displays the chart with the current compass heading of your boat at the topof the screen. The heading data from a compass is required. When the headingchanges, the ship icon remains fixed, and the chart picture rotates according to heading.North-up: North is at the top of the screen. When your heading changes, the ship iconmoves according to heading. This mode is for long-range navigation.Course-up: The chart picture is stabilized, and shown with your current course (overground) at the top of the screen. The ship icon moves with the heading. If you selecta new course, the picture resets to display the new course at the top of the screen. Ifno destination is set, the course is upward on the screen at the moment course-up isselected.PT000015 NM1-18