12.Navigation Tools
12-3
12.2.2 How to shift the VRM
With control unit RCU-018
There are two VRMs, No. 1 and No. 2, which appear as dashed rings so that you can discriminate them from the
fixed range rings. The two VRMs can be distinguished from each other by different lengths of their dashes. Press the
VRM ON key to display either of the VRMs. Successive presses of the VRM ON key toggle the active VRM
between No. 1 and No. 2. To adjust a VRM, use the VRM rotary encoder, above the VRM OFF and VRM ON
keys.
With control unit RCU-015
You have two methods available to adjust the VRM. You can directly enter a numeric value for the VRM on the
Nav. Marks dialog box, or you can locate cursor over the VRM, then press and hold down the left mouse button
while rotating the trackball. If you locate the cursor over the intersection of a VRM and an EBL, you can adjust
them together, using the left mouse button and trackball. (Note that this can also be done from the
keyboard-equipped control unit.) The VRMs can be turned on or off from the Nav Marks dialog box by checking or
unchecking "VRM" on the Set 1 or Set 2 page.
12.2.3 How to shift the reference point
The reference point, shown on the display with a cross mark (if turned on in the Nav Marks dialog box), is a
specified location to which measurements of range and bearing are referred. To select the location for the reference
point, open the Nav. Marks dialog box, check Centered, put the cursor at the location desired then push the right
mouse button.
REF point
VRM
EBL
Range: 2NM
Info
centered
Display
REF point
LAT
LON
(WT)
Centered reference point with Variable Range Marker (VRM) and Electronic Bearing Line (EBL)
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