Sperry Marine Visionmaster FT ECDIS, User Manual

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Navigation Tools ECDIS User Guide
5-20 65900012
Creating LOPs
Click on NAV Tools in the main menu and then select Line Of Position from
the list.
To create one or more LOPs, do the following:
There is one of two ways to generate a LOP, described below:
1. Click in the Latitude/Longitude (LAT/LON)
fields, a drop down location keypad appears
from where you can select the object
position in a number of ways described
below:
a. Query - Select an existing mariner object
on the chart display for the object position
b. Offset - Select a range and bearing value
from the current cursor position for the
object position.
c. From Chart - Move the cursor to the
location on the chart display and click at
the desired position.
d. Ownship - Select to position the object at the current location of
ownship.
e. Enter a manual LAT/LON location using the numerical keypad.
2. Or, right click on the display at the
desired LOP reference point and select
Add Line of Position (LOP) in the
semi-transparent context menu that appears. The Line Of Position
menu appears when `Add LOP' is selected from the context menu
and will show the LAT/LON of the selected location with the
Bearing and Range values set to 0.0.
3. All LOPs default to true bearing at 0.00°. To change from Bearing
to range click the Range radio button. The range defaults to 0.00
NM. A bearing angle and/or a distance range can be entered for
the LOP, as described below:
a. Select a bearing by ticking the Bearing check box. When Bearing is
selected the screen displays a vertical magenta line from the LOP
circle and a time stamp. Click in the field and define the required
bearing angle, the bearing line is re-drawn to the angle entered.
The bearing line moves across the display, based on the speed
and course of the vessel.