JRC JMA-5212-4, User Manual

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2.3.5 Software Buttons for Area 5 (Own Ship Information Area) (Right
Side of the Radar Display)
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Speed sensor switching
The speed sensor is switched whenever the button
is clicked.
MAN (Manual)
Ÿ
LOG (Single-axis log)
Ÿ
2AXW (Double-axes to water)
Ÿ
2AXG (Double-axes to ground)
Ÿ
GPS
Ÿ
MAN
If you selected the 2AXW, the value of
forward-backward direction is indicated.
If ships in shallow water, when the accuracy of
the dual-axis log may be decreased.
If ships in deep sea area, when the accuracy of the
dual-axis log error may be occurred.
The accuracy of GPS's COG is ±3° when own
ships speed no fewer than 1kn, no more than 17kn.
The accuracy of GPS's COG is ±1° when own
ships speed over 17kn.
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Time display mode switching
The time display mode UTC or UTC(S)
(universal time clock) / LMT or LMT(S)
(local mean time) is switched whenever this
button is clicked. UTC(S) and LMT(S) are
calculated with the time of radar system.
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Manual own ship's speed setting
When selection of the speed sensor is set to
MAN , enter the own ship's speed manually.
If this button is clicked, the numeric value input
screen is opened. After setting a value, determine
the entry by clicking ENT .
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Positioning system (example: GPS,
DGPS)
Displays the type of the position fixing equipment
that contains the own ship's information.
LRNA :
LORAN A
LRNC : LORAN C
GPS : GPS
DGPS : DGPS (SBAS also included)
JG : JRC format (G)
JC : JRC format (C)
JN : JRC format (N)
JZ : JRC format (Z)
MAN : MANUAL
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When a picture freeze occurs, the
turn of this symbol stops.
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Geodetic System
The geodetic system used with the position fixing
system is displayed.
The display items on the Geodetic System List
screen in 3.8.5 "Set and Display Geodetic
System" are displayed.
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