Raytheon Pathfinder ECDIS Operator's Manual page 295

9.1.7 Navigation Calculator
The ECDIS Navigation Calculator utility provides you with a quick way to
calculate two different scenarios:
S The arrival time, at a waypoint, if you proceed at a given speed.
S The speed necessary to arrive at a waypoint at a specific time.
You may make all calculations using a specific leg of the route. By setting the
active leg, the Navigation Calculator will ignore current speed and/or ETA
settings for the active waypoint.
To obtain the most accurate leg distance, the Navigation Calculator
calculates the leg distance considering the predicted turning arc.
9.1.7.1 Speed Calculations
Within this calculation method, the reaching of the individual
path points via the preset speed can be calculated (see Figure: 1−9).
Procedure:
Step 1 Select Navigation Calculator from the Nav Tools menu.
Step 2 Select a route.
Step 3 If you want to select an active leg, use the spinner arrows next to the
Step 4 In the Speed column for the waypoint whose ETA you wish to
Step 5 Edit the speed if necessary, or click in the Fix Speed check box.
Step 6 Click on Calculate. The ETA is calculated for each waypoint up to the
Edition: 30.MAR.2007
ECDIS
Operator Manual
The dialog box appears.
Active Leg box.
calculate, highlight the speed. The speed appears in the text box of
the dialog box
The item color changes from black to red.
waypoint whose speed you selected to hold constant.
9−13
NOTE
R
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