Furuno FR-1710 - Manual (Page 39)

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1.27 Parallel Index Lines
Parallel index lines are useful for keeping a
constant distance between own ship and a
coastline or a partner ship when navigating.
The orientation of the index lines is controlled
with the EBL rotary control and the intervals
between the lines adjusted with the VRM ro-
tary control (provided that No.2 VRM is ac-
tive).
Index lines
Figure 1-36 Index lines
Displaying/erasing the index lines
Press the [INDEX LINE] key to display/erase
the index lines. Each press of the key turns
the parallel index lines on (enabling adjust-
ment by VRM, EBL), fixes them on the dis-
play or turns them off.
Selecting number of index lines to
display
Maximum number of the index lines can be
set for 2 or 6 on the MARK/LINE in the
OTHER menu.
1.28 Origin Mark
You can mark any reference points, promi-
nent target or a point of particular interest us-
ing the origin mark feature. This mark is
geographically fixed, namely, ground stabi-
lized. Twenty such origin marks can be en-
tered. This function is not available when the
RP-17 board is installed.
To use the origin mark:
1. Place the cursor (+) at a point where you
want to place a reference mark by oper-
ating the trackball.
2. Press the [MARK] key. The origin mark
appears at the cursor position, of which
range and bearing are indicated at the
upper-right section of the screen.
Origin mark reference
The origin mark can be set relative to own
ship (relative), or referenced to land (sea or
ground stabilized).
1. Press the [MENU] key.
2. Press the [8] key twice to select MARK.
MARK
1. ERASE
2. MODE REL TRUE
Figure 1-37 MARK menu
3. Press the [2] to select the REL or TRUE
from the MODE field as appropriate.
4. Press the [ENTER/SELECT] key.
5. Press the [MENU] key.
Erasing origin marks
Erasing individual origin marks
Select the origin mark with the cursor and
then press the [CANCEL/CLEAR] key.
Erasing all origin marks
1. Press the [MENU] key.
2. Press the [8] key twice to select MARK.
3. Press the [1] key twice.
4. Press the [MENU] key.