Northrop Grumman Sperry Marine VisionMaster FT, User Manual

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Radar/Chart Radar User Guide Routes
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Required Speed
Required Speed enables the user to specify a
desired arrival time for any selected waypoint on
a monitored route. When a desired arrival time
is entered the system calculates own ship speed
required to the present leg, and speed required
for the remaining legs in order to achieve this
arrival time.
To change the desired ETA and required
speeds do the following:
1. To change the ETA:
i. Select the waypoint from where the
speed calculations are to be made.
ii. Click inside the Desired ETA field
on the specific data to be changed.
The field data changes to green
(editable), the selected data is
highlighted and an editing window
appears directly below the ETA field.
iii. To move the date or time back click
on the Down arrow, to move the date
or time forward click on the Up arrow.
To move the highlight back or
forward (e.g. from Month to Year) click on the side arrows.
iv. With the correct ETA data displayed click on the OK button.
2. When the desired arrival time is set the system calculates the
speed required on the present leg and remaining legs of the route
in order to achieve the specified ETA. The required speeds are
shown in the
Calculated fields.
3. To specify a speed for the current leg and remaining legs select the
Manual radio buttons and click in the Manual fields, the text
changes to green (editable). Move the trackball right to increase
the value and left click again to accept the value.
4. Click the Calculated radio button to see the speed required to
meet the desired ETA on the current leg and remaining legs based
on the manual speeds entered.