Northrop Grumman Sperry Marine VisionMaster FT, User Manual

Page: 183 / 533

Radar/Chart Radar User Guide Navigation Tools
65900010 6-41
Editing LOPs
To edit LOPs, do the following:
When one or more LOPs are created, the list of
LOPs is displayed in the Line Of Position
window. The time displayed with each LOP is
the system time that the LOP was created.
From the Lines Of Position window the following
actions may be implemented:

Turn the display of LOPs on or off

Highlight a LOP

Change from bearing to range

Change from bearing angle or range radius

Change from True bearing to Relative
bearing

Delete a LOP

Accept a position fix

Delete all LOPs from the system
1. To turn all the LOPs off (the default is on) untick the Display Lines
of Position check box. All LOPs in the list retain their values when
the LOPs display is switched off.
2. To highlight a LOP, click its number button, the active point
reference of the LOP and the line are displayed as purple.
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.
4. To change the bearing angle or range radius click in the respective
field, hold down the left button and move the trackball left to
decrease, or right to increase the bearing/range. When a
bearing/range is entered the bearing line or range radius line
appears on the chart display as a thin solid purple line. The bearing
line or range ring moves across the display, based on own ship's
course and speed over ground.
5. To change from True bearing to Relative bearing, click the T
button, the button toggles between T (true) and R (relative).
6. To delete a specific LOP from the list click on the Delete button
immediately below the number. The LOP is deleted from the list
and the chart display, with the existing LOPs retaining their
numbering.