Furuno GP-3500 - Manual (Page 33)

2. PLOTTER AND PILOT DISPLAY DESCRIPTION
2-5
Compass indicator
The black inverted triangle shows the bearing to the destination waypoint, and
the red triangle shows own ship’s course.
Note:
The course means the direction of own ship’s movement, it is not the
direction of heading. The cursor includes the affect of current and wind.
Depth and water temperature graphs
The depth and water temperature graphs, which require appropriate sensors,
show the latest 10 minutes of depth and water temperature data. The range of
the depth graph is 50 feet and it is automatically adjusted with depth.
XTE (cross-track error) monitor
The black boat-shaped (own ship mark) mark shows ship’s cross-track from the
intended course and direction, and amount to steer to return to course. It is
shown in black when the amount of cross-track error is within the XTE monitor
range and yellow when it is over. An arrow appears at the right or left side of the
XTE monitor and it shows the direction to steer to return to the intended course.
The arrow is shown in red when you should steer left, and green when you
should steer right. In the example on the previous page you would steer right to
return to course set. To maintain course, steer the vessel so the own ship marker
stays at the center of the XTE monitor.