Furuno FAR-28x7 Series - Manual (Page 59)

1. RADAR OPERATION
1-33
5. Push the left button to anchor the VRM and fix its readout, or push the right
button to return the VRM to its previous location (range).
6. To erase a VRM, choose the appropriate VRM readout box and then push
the left button until the VRM disappears from the screen.
1.20.3 Choosing VRM unit of measurement (B, C and W types)
1. Roll the trackball to choose the MENU box at the right side of the screen. The
guidance box at the bottom right corner now reads “DISP MAIN MENU.”
2. Push the left button to display the MAIN menu.
3. Roll the wheel to choose 2 [MARK] and then push the wheel or the left
button.
4. Choose 9 [EBL, VRM, CURSOR SET] and then push the wheel.
5. Choose VRM1 or VRM2 as appropriate and push the wheel.
6. Choose unit of measurement desired and then push the wheel.
7. Push the right button twice to close the menu.
1.21 Measuring the Bearing
Use the Electronic Bearing Lines (EBLs) to take bearings of targets. There are
two EBLs, No. 1 and No. 2. Each EBL is a straight dashed line extending out
from the own ship position up to the circumference of the radar picture. The fine
dashed line is the No. 1 EBL and the coarse dashed one is the No. 2 EBL.
1.21.1 Measuring the bearing
By keyboard
1. Press the [EBL ON] key to display either of the EBLs. Successive presses of
the [EBL ON] key toggle the active EBL between No. 1 and No. 2. The
currently active marker is enclosed with >.....<.
2. Operate the EBL rotary control clockwise or counterclockwise until the active
EBL bisects the target of interest, and read its bearing at the lower-left corner
of the screen.
Note: Each EBL carries a range marker, or a short line crossing the EBL at
right angles and its distance from the EBL origin is indicated at the
VRM readout whether or not the corresponding VRM is displayed. The
range marker changes its position along the EBL with the rotation of
the VRM control.
3. Press the [EBL OFF] key to erase each EBL.