Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Routes Radar/Chart Radar User Guide
8-44 65900010
The Desired Arrival Date/Time allows the operator to enter the date and
time that they wish to arrive at the arrival waypoint. This value is then used
to compute the Required Speed
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. Note that the Desired Arrival Date/Time
value only has an effect if Limited Required Speed is selected.
To the right of this field is the desired arrival Time To Go before own ship
reaches the end of the route.
1. To change the arrival date/time click in the
field. The text changes to green (editable)
and a navigation keypad appears.
2. Click on the left or right arrows to navigate
to the data to be changed and with the text
in highlight click on the up/down arrows to change the values.
3. Click OK when complete.
When the desired date/time data is changed, the system automatically
updates the calculated time to end of route, the required speed values in
the speed table, and possibly (depending on settings made in the Route
Editor Table) the speed command values in the speed table.
Current Leg Speed Command
The Current Leg Speed Command area allows the operator to select how
the speed of the current leg will be affected. It includes two settings:
Assume current speed and Allow speed change .

Assume current speed forces the speed of the current leg to be
equal to ownship’s present ground speed.

Allow speed change enables values other than ship's current
ground speed to be used for the speed command on the current
leg. If the Speed Command Setting is
Manual , then speed
commands may be edited for the current leg. If the setting is
Limited Required Speed , then the system may change the speed
command for the current leg to achieve the desired arrival time.
To change the leg speed command, click the radio button next to the
option.
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Required Speed is the speed own ship needs to travel for a given route segment, such that
the desired arrival date/time is achieved.