Navigation Data - Simrad NX40 Installation & Operation Manual

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Navigation data

• BRG Bearing to Destination: Bearing to the destination from the boat.
• BRG Bearing to cursor: Bearing to cursor from boat
• CDI Course Deviation Indicator: When the boat is navigating to a point, the
chart and highway windows show a parallel line on either side of the plotted course.
These two lines are called the Course Deviation Indicator (CDI) lines. The distance
from the plotted course to a CDI line is the CDI scale.
• Set the CDI scale to the maximum distance that the boat should deviate from the
plotted course. The chart and highway windows show the CDI lines, which are like
a highway over the water where the boat will move. The windows show how far the
boat has deviated from the plotted course and if the boat is approaching a CDI line.
If the XTE alarm is enabled an alarm will sound if the boat reaches a CDI line.
• COG Course Over Ground: Direction in which the boat is moving over the
ground.
• CTS Course To Steer: Optimum course to steer to return to the plotted
course.
• DTG Distance To Go: Distance from the boat to the destination.
• ETA Expected Time of Arrival: At the destination, assuming that SOG and
COG remain constant.
• DST Distance from boat to cursor
• SOG Speed Over Ground: Current boat speed over the ground. This is not
necessarily the same as the boat speed through the water nor the speed at which
it is approaching the destination.
• STR Steering: The difference between COG and CTS.
• TTG Time To Go: The estimated time to reach the destination.
• XTE Cross Track Error: The distance from the boat to the nearest point of the
plotted course. XTE may have a letter: R means steer to the right to return to the
plotted course, L means steer to the left.
• VMG Velocity Made Good: The speed at which the boat is approaching the
destination.
Destination
SOG (speed)
STR
Plotted
course
Start
(distance)
DTG
VMG (speed)
BRG
COG
CTS
Boat position
Simrad NX40/45 Installation and Operation Manual
Destination
Plotted
XTE
course
(distance)
Boat
position
CDI scale
CDI scale
(distance)
(distance)
Start
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