Northrop Grumman Sperry Marine VisionMaster FT, Руководство пользователя

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Navigation Tools Radar/Chart Radar User Guide
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Secondary History Tracks
Secondary history tracks include other available position sensor data
sources as defined in the Position Sensor, these may include the following:

dead reckoned sensor.

LOP Sensor

manual position sensor
To select a position source for a secondary history track tick the sensor
source check box.
When a position source is changed, the primary history track transitions to
the newly selected position source while maintaining a smooth continuous
line.
Position sources for secondary tracks can be
individually selected and turned off. Tracks for
each position source will have different line styles,
as shown in the
Sensors Histories window.
Changing History Settings
Maximum Length
The maximum length value is the amount of time that the history track will
be displayed on the screen. The history track period is variable from 1.0
minute to 24.0 hours. For example, if the length is set to 1 hour then
ownship's position history for the past hour only will be displayed.
To change the maximum length click in the field and when the current value
changes to green move the trackball to increase or decrease the value,
click again to accept the selected time.
Earliest Time to Show
The Earliest Time To Show defaults to the current date and time indicated
in UTC or local time, as defined in Time Management.
To display ownship history starting at a specific time period, do the
following:
1. Click in the field, the current value
changes to green and a navigation keypad
appears beneath the field.
2. Click on the left or right arrows to navigate
to the data to be changed. For example, if
you want to display the history track starting from 30 minutes
before the current time, highlight the minutes value.
3. Click on the up/down arrows to change the values.