10 initial settings, 11 latitude error table (on 96 nm range scale) – Furuno FR-2105-B User Manual
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4.10 Initial Settings
An item on the PLOTTER DISP SELECT menu can be deleted through the VIDEO
PLOTTER INITIAL SETTING menu.
1. Press [NAV MENU].
2. Press [0] twice to display the VIDEO PLOTTER INITIAL SETTING menu.
[VIDEO PLOTTER INITIAL SETTING]
1 [VIDEO PLOTTER 2]
2 DANGER HIGHLIGHT
ON/OFF
3 COASTLINE
ON/OFF
4 LAND DENSITY
ON/OFF
5 PLACE NAME
ON/OFF
6 MARK
ON/OFF
7 OWN SHIP PLOT
ON/OFF
8 TARGET PLOT
ON/OFF
9 CONTOUR LINE
ON/OFF
0 GRID
ON/OFF
3. Press appropriate numeral key to turn on or off item.
4. Press [ENTER].
5. Repeat 3 and 4.
NOTE:
If Video Plotter fails to provide intended functions, turn ON the required functions on this
menu.
4.11 Latitude Error Table (on 96 nm range scale)
The longitude lines concentrate on the north pole and south pole, namely, 1 nm is equivalent
to 1 minute at 0 degree latitude, 2 minutes at 60 degrees latitude, 3 minutes at 70 degrees
latitude and so on. For this reason, a longitude error occurs on the radar display. For example,
when own ship is at 60
°
N and 135
°
E, even if the cursor indication is 62
°
N and 139
°
E, the real
cursor position is deviated to left (west) side. The table below shows the longitude error,
represented from 0
°
to 90
°
at 96 nm from the radar center (own ship).
62
°
N
62
°
N
60
°
N
135
°
E
139
°
E
Real crsor position
Crsor position
indicated
LAT
E
Real crsor position
Crsor position
indeicated
96 nm
θ
OS position
R: Error