Operation Manual

8120 Installation and Operation Manual18

3 Navigation: Chart

3-1 Introduction to navigating

The chart window shows the chart, the boat’s position course and navigation data.

The Instrument has two ways of navigating, going straight to a point or following a route.

3-1-1 Navigating to a point

When the Instrument is navigating to a

point, the chart and highway windows show

navigation data:

A The boat position .

B The destination point marked with a circle.

C The boat’s plotted course to the

destination.

D Two CDI lines, parallel to the boat’s plotted

course, which indicate the maximum

expected deviation from the plotted

course.

For more information, see appendix C.

If the Instrument is connected to an autopilot,

the Instrument will send data to the autopilot

to steer the boat to the destination. Start the

autopilot before starting to navigate to the

point.

If the Instrument has no autopilot, steer the

boat manually:

a use the boat position and destination on

the chart or highway windows

b or use navigation data displayed on the

data header (see section 2-7-3)

c or use COG and BRG on the compass (see

section 2-7-4).

Note:

1 If the XTE alarm is enabled, an alarm will

sound if the boat deviates too much from

its intended course (see section 17-8).

2 If the arrival radius alarm is enabled, then

an alarm will sound to show that the boat

has reached the destination

(see section 17-8).

3 When the destination is reached an

arrival warning appears with the option

to cancel navigation (goto or route). yes

the navigation is cancelled, no navigation

continues however XTE and highway are

no longer displayed.