Furuno FCR-2107 series, Operator'S Manual

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2. Radar Operation
2-22
2.15 Measuring Range and Bearing Between Two Targets
From the control unit w/keyboard
1. Operate the trackball to place the origin of the No. 1 EBL, for example, on a target of interest (target 1 in the
illustrated example).
2. Press the EBL OFFSET key.
3. Operate the EBL rotary control until the EBL passes through another target of interest (target 2).
4. Operate the VRM rotary control until the range marker on the EBL is on the inside edge of target 2. The active
VRM readout at the lower-right corner of the screen indicates the distance between the two targets.
You can repeat the same procedure on third and fourth targets by using the No. 2 EBL and the No. 2 VRM.
Bearing is shown relative to own ship with suffix "R" or as a true bearing with suffix "T". To return the EBL origin
to the screen center, push the
EBL OFFSET key again.
By trackball
1. Display an EBL, following steps 1-3 in "By trackball"in section 2.12.1.
2. Use the trackball to place the cursor on target 1, use the scrollwheel to show Offcenter REF pt in the guidance
box then push the scrollwheel.
3. Put the cursor in the EBL box, spin the scrollwheel, and put the cursor on target 2.
4. Operate the No. 1 VRM until the range marker on the EBL aligns with target 2. The active VRM readout at the
lower-right corner of the screen indicates the distance between the two targets.
You can repeat the same procedure on third and fourth targets by using the No. 2 EBL and the No. 2 VRM.
Measuring range and bearing between two targets
To return the EBL origin to the screen center, use the scrollwheel to show Centered Ref. Pt in the guidance area then
push the right button.