Sperry Marine VISIONMASTER FT ECDIS-E, User Manual

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ECDIS-E User Guide Navigation Tools
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Ownship History
Ownship history tracks are a series of lines
indicating the past locations of ownship as defined
by position sources. There are two types of history
track:
•
Primary - a line indicating the past location of
ownship as defined by the configured position
sensor (usually GPS).
•
Position Sensor tracks- a line indicating past
locations as defined by position data sources.
Both sets of history tracks may be displayed
simultaneously. The history tracks are differentiated
by line style and displayed in the same colour as
the heading line. Primary history tracks are
displayed as a thick solid line, the position sensor
track line is displayed as a thin line.
Past position dots are displayed on the history
tracks, spaced at operator selected intervals.
Event marks may be added at any time to
ownship's history track.
Details of past position dots and event marks may be displayed.
Primary History Track
To activate primary history track, tick the Selected Sensor (Primary) box,
the screen will show a solid line with a series of past position dots. The
number of dots shown will be based on the maximum length of the track
and the spacing of the position dots.
Position Sensor Tracks
Position sensor tracks include other available position sensor data sources
as defined in the Position Sensor, these may include the following:

DR (dead reckoned sensor)

LOP (Line of Position)

MAN (manually entered position)
To select a position source for a secondary history track, activate the
position sensor source radio button. Only one sensor source can be
selected at one time.