Radar/Chart Radar User Guide
Presentation, Motion, Vector
and Trail Modes
65900010
5-7
Motion Modes
The currently selected Motion Mode is displayed at the
top right of the screen. There are two motion modes
available:
True Motion (TM)
Relative Motion (RM)
The motion mode determines how chart information is updated; in TM own
ship moves over the chart, in RM the chart moves under own ship. Motion
modes can be altered in both Standby and Transmit mode.
Relative Motion
Own ship is shown at a selected point or fixed point in the video circle
(normally the centre) with all target trails displayed. How moving and
stationary target trails are displayed is dependent on the trails mode
selected (True or Relative), see Trails Mode.
The advantage of this mode over true motion is that a constant range
ahead of own ship is always shown, so there is no need to reset the
display.
True Motion
In True Motion (TM) own ship moves across the video circle at the selected
ground or water based velocity (see Sensor Management). In this mode all
moving target trails are displayed, whereas stationary targets trails are not
generated.
Motion Mode Changing Automatically
A motion mode may be automatically changed as a side effect of another
action (e.g. changing the range scale or presentation mode) or as a result
of an invalid heading. When this happens a temporary prompt indicating
that the motion mode has changed is displayed, see Prompts.
Presentation Modes affecting Motion Modes
If the display is 'unstabilised’ (e.g. the heading is invalid), the presentation
mode is
Unstabilised Head Up
(see Presentation Modes) and only RM
mode can be selected.
If the display becomes `stabilised’ then TM may be selected, except where
the presentation mode is
Stabilised Head Up
, in this case the motion
mode is always relative.
Summary of Contents for VisionMaster FT
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