95
Reference section 6 — Radar
Using the Markers keys
Reference Manual Revision B
Electronic Bearing Line (EBL)
The Electronic Bearing Line is a marker
that you can place on top of the radar
image to aid in navigation and to keep
track of your surroundings.
Use the cursor pad to move the EBL
around your position to measure the
bearing to any object on the screen.
Variable Range Marker (VRM)
The Variable Range Marker is displayed as
a circle around your vessel. Use the cursor
pad to make the circle bigger or smaller.
The distance to the marker is displayed in
the lower left corner of the screen.
Guard zone
Press the
Guard Zone
menu key to control
this feature. Echoes detected inside the
guard zone will cause an alarm.
The guard zone is bounded by red lines —
an inner and an outer arc centered on the
vessel, and two straight lines extending
outward from the vessel. The interior of
the guard zone is yellow.
You can turn visibility of the zone on or
off, and change its boundaries.
Press the following keys to adjust each
guard zone.
Press
Visibility
to show or hide the guard
zone. When the zone is hidden, it doesn’t
alarm.
To adjust the position of the guard zone,
press
GuardZone
(if necessary) so that it
displays
Position
. Use the cursor pad to set
the position.
To adjust the size of the guard zone, press
GuardZone
(if necessary) so that it displays
Size
. Use the cursor pad to set its size.
Guard Zone
Figure 4: Guard zone
Summary of Contents for 972
Page 1: ...Northstar 972 Quickstart Guide and Reference Manual Revision B ...
Page 12: ...8 Getting Started Purchasing charts Northstar 972 ...
Page 19: ...15 Displaying the chart screen Quickstart Guide Revision B Chart screen ...
Page 30: ...26 SAVE and Man Overboard MOB Northstar 972 ...
Page 54: ...50 Reference section 3 Position coordinates Using Phantom Loran Northstar 972 ...
Page 90: ...86 Reference section 6 Radar Transferring waypoints to and from a PC Northstar 972 ...
Page 106: ...102 Reference section 7 Echo sounding MARPA targets Northstar 972 ...
Page 130: ...126 Reference section 7 Echo sounding Troubleshooting the echo sounder Northstar 972 ...
Page 134: ...130 Reference section 8 Video Displaying video Northstar 972 ...
Page 148: ...144 Reference section 10 Networking Restrictions Northstar 972 ...
Page 158: ...154 Reference section 11 Setup Changing the time zone Northstar 972 ...
Page 164: ...160 Reference section 11 Appendix A Datum list Changing the time zone Northstar 972 ...
Page 168: ...164 Northstar 972 Notes ...
Page 169: ...Notes 165 Operator s Manual Revision B ...
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