Furuno MFD8 Guía Del Usuario

6.  Radar

You can measure the range to a target three methods:

•  By the range rings

•  By the cursor (see section 1.10)

•  By the Variable Range Marker (VRM)

Use the fixed range rings to get a rough estimate of the range to a target. These rings 
are the concentric solid circles about your vessel. The number of rings is automatically 
controlled by the selected range scale. The interval is displayed at the upper-left po-
sition of the screen. To measure the range with the range rings, count the number of 
rings between the center of the display and the target. Check the range ring interval 
and estimate the distance of the echo from the inner edge of the nearest ring.

If the rings are not displayed, push the right-click button to show the Radar pop-up 
menu. Use the RotoKey to select [Rings] then push the key to show or hide the range 
rings.

There are two VRMs, No. 1 and No. 2. The VRMs are dashed rings so that you can 
identify the rings from the fixed range rings. The length of the dashes on each VRM is 
different so that you can identify the rings. The dashes of the No. 1 VRM are shorter 
than those of the No. 2 VRM.

1.

Push the RotoKey to show the soft controls. (In the default arrangement, a short-
push activates VRM1 and a long-push activates VRM1 and VRM2.)

2.

Use the RotoKey to select VRM followed by VRM1 or VRM2 to show the VRM 
box. The indication of the selected VRM is shown in green in the box.

3.

Rotate the RotoKey (or use the CursorPad) to put the VRM on the inner edge of 
the target. Read the range to the target at the VRM box. Distances shorter than 
0.500 nm are shown in yards (default arrangement).