JRC J-NAV 500 Instruction Manual page 46

1. Display operations
• Press in the [POSITION] display mode.
• To return to the [POSITION] display mode, press
Display example
[Latitude, Longitude display]
2. Setting
(1) Display format
The [POSITION] display mode can be set to one of the following display formats.
L/L OR TD
(2) Position correction
Use this function to adjust the positioning GPS/DGPS sensor to marine chart.
POS CORR
POS CORR
TD correction
(3) Geodetic system correction
The latitude and longitude of the positioning data can be converted to latitude and longitude data
of another geodetic system. There are a total of 46 geodetic systems. The names of the first nine
systems are displayed by name and the rest are displayed by number. The names of the other
geodetic systems are listed in Appendix B, "Geodetic System Table."
GEODETIC
(4) Magnetic compass correction
Magnetic compass correction
AUTO
MANU
In a manual setting, it is possible to read the magnetic compass variation from the compass chart of
a marine chart. Example: When the magnetic compass shows a reading of 60 and the navigator
indicates 40 , the (W) 20 difference can be used to correct the navigator setting.
L/L : latitude, longitude display (default)
TD : Time Difference display
N 00.000'
S
W 00.000'
E
TD1 + 0.0
TD2 + 0.0
See Appendix B, "Geodetic System Table."
(Automatic magnetic compass correction)
E
00 (Manual magnetic compass correction)
W
.
[Time Difference Display]
for latitude correction (in L/L display format)
for longitude correction (in L/L display format)
for TD1 correction (in TD display format)
for TD2 correction (in TD display format)
GPS Navigator J-NAV500
45