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14
r PLOTTER MODEq DOP AS A POSITIONING PRECISION INDICATOR
To set the baud rate (transmission speed) of the beacon station, proceed as
follows.
q Press the [MENU] key.
The Main Menu screen will appear.
w Select “Positioning Menu” using the [UP] or [DOWN] key and press the [SET]
key.
The Positioning Menu screen will appear.
e Select “DGPS” using the [UP] or [DOWN] key and press the [SET] key.
The DGPS screen will appear.
r Select “Beacon Baud Rate” using the [UP] or [DOWN] key and press the [SET]
key.
The selected item turns blue.
t Select “100” or “200” using the [LEFT] or [RIGHT] key and press the [SET] key.
The baud rate of the beacon station will be set as you selected.
y When you finish setting the baud rate, press the [MENU] key.
You will return to the previous screen.
* If the frequency of the beacon station has been set to “Auto” in section (12)-3,
the baud rate of the beacon station is also set automatically.
In this case, manual baud rate setting is ignored.
To access the Positioning Information screen where information on the
DGPS/GPS in use is displayed, proceed as follows.
q Press the [MENU] key.
The Main Menu screen will appear.
w Select “Positioning Menu” using the [UP] or [DOWN] key and press the [SET]
key.
The Positioning Menu screen will appear.
e Select “Positioning Info” using the [UP] or [DOWN] key and press the [SET] key.
The Positioning Information screen will appear.
r Press the [MENU] key to return to the previous screen.
The DOP (Dilution Of Precision) is a positioning precision indicator which
represents the geometrical arrangement of the navigational satellites and the
ship.
The DOP ranges from “0.00” (best arrangement) to “99.99” (worst arrangement).
Note that the positioning error of the GPS may increase depending on policies of
the U.S. Department of Defense.
(12)-4 Setting the baud rate of
the beacon station
(13) Access to Positioning
Information screen
(14) DOP as a Positioning
Precision Indicator
80.0FT
5
CLR
BACK
H
0
10
20
30
40
POSITIONING INFO
SAT# S/N BRG ELV
DOP
1.50
DGPS INFOMATION
RD-200
Rev.1.1
FREQUENCY 283.5
kHz
BAUD RATE 200
S/N 00
12 50 0 81
15 45 90 79
02 40 180 56
16 52 270 63
20 60 45 30
22 30 135 10
10 56 225 25
09 63 315 44
Bad geometrical arrangement: DOP is large.
Good geometrical arrangement: DOP is small.
DGPS
80.0FT
5
CLR
SET
SET
CANC
H
0
10
20
30
40
USING DGPS
ON OFF
BEACON FREQUENCY
283.5kHz AUTO
BEACON BAUD RATE
100 200
SEL