Raymarine H6, Owner'S Manual

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Using the radar 63
Range rings
Range rings are concentric circles displayed on-screen and centered from your
boat at pre-set distances. The number of rings shown and their spacing changes
automatically as you change the range.
Range rings can be used as a basic method of obtaining distance information
from the radar picture.
Range rings can be turned on or off as required.
To turn range rings on/off, use the right-mouse menu, select
Range Rings and
click. A check mark will appear when they are selected on.
VRMs/EBLs.
A variable range marker (VRM) and its associated electronic bearing line (EBL) are
used to determine the range and bearing (respectively) of objects detected by the
radar.
A standard VRM is displayed as a circle with its center on your boat’s position, and
its EBL is displayed as a line from the origin, to the edge of the radar screen. Both
are shown as dotted lines. If you range in or out, or offset the center of the display,
the original setting of the VRM/EBL remains unchanged. H6 allows two VRMs/
EBLs to be displayed at the same time.
When a VRM/EBL pair is active, their bearing and range can be displayed in an
associated databox. This is displayed by clicking the
VRM/EBL Box softkey to ON.
Using a VRM/EBL
To measure the range and/or bearing of a target or point from your boat’s
position, you need to display a VRM/EBL and edit (move) it on-screen so that it
intersects the desired target or point.
The first VRM/EBL will be placed at a location 1/3 of the current range and 030
0
relative to your boat’s heading. If this setting is adjusted, the display will retain
the adjustments and use them when the VRM/EBL is next turned on.
To use a VRM/EBL to tell you how far away a target is and in what
direction it is traveling:
1. Click the
VRM/EBL softkey.
2. Click
VRM/EBL 1. The softkey options for VRM/EBL 1 are displayed.
3. Click the VRM/EBL 1 softkey to ON. The VRM/EBL will be shown on the radar
picture with your boat at its center.
81238_1.book Page 63 Thursday, September 16, 2004 2:49 PM