JRC JMR-5410-4X, Instruction Manual

Page: 234 / 688

Section 5 Basic Operation of the Radar 5-20
Setting items Description Display image
[TM] True Motion Mode (True Motion display)
• In Ground mode, the own ship’s display
position moves according to the Speed
Over the Ground (SOG) and fixed targets
such as land are fixed on the radar screen.
• In Water mode, the own ship’s display
position moves according to the Speed
Through Water (STW) and fixed targets
such as land move according to the
difference between the Speed Through
Water (STW) and the Speed Over the
Ground (SOG).
• When the own ship reaches to the true
motion status, the own ship’s position is set
at the position of about 69% of the screen
radius in direction opposite to the own ship’s
course by adding the influence of the tidal
current. The ship’s position starts to move
according to the own ship’s speed, course,
and influence of the tidal current. When the
own ship’s position reaches the position of
about 69% of the screen radius, the position
is reset to the position of about 75% of the
screen radius in the direction opposite to the
own ship’s course (COG) by adding the
influence of the tidal current at that time.
[RM(T)]
or
[RM(R)] Relative Motion Mode (Relative Motion
display)
• Own ship is fixed at the centre of the radar
screen and fixed targets such as land move
relatively.
[TM Reset] TM Reset
• The own ship’s position is reset in [TM] (true
motion display) mode. For the details, refer
to "5.4.6.1 Resetting own ship to its initial
position in [TM] (True Motion display)
mode".
5.4.6.1 Resetting own ship to its initial position in [TM]
(True Motion display) mode
1
Select [TM Reset] from the Motion mode.
Own ship is reset to its initial position as established when the relative motion mode is changed
to the true motion mode. The ship starts moving from that position.
Fixed on the
radar display
Moving
depending on
own ship's
speed