Seiwa SWRx series - Manual (Page 20)

22 User Manual
Fig. 2.1.2 - Chart Overlay
2.1.3 Range
Selects the Radar range among 1/8, 1/4, 1/2, 3/4, 1, 1 + 1/2, 2, 3, 4, 6, 8, 12,
16, 24, 36 and 48 Nm (the maximum range depends on the antenna used).
To select the Radar Range value follow this procedure:
[MENU] + "Range" + [ENTER] + select the desired value + [ENTER]
NOTE Changing scale takes about 5 seconds.
Also it is possible to select the Range in Radar page using [ZOOM IN]/[ZOOM
OUT].
2.1.4 Orientation
The Radar orientation option allows to choose the display mode, Head Up (HU),
North Up (NU) or Track Up (TU), that refers to the top of the screen as it relates
to the direction of the boat.
The Radar direction modes are described in the following table:
Head Up : The Radar picture is displayed with the vessel’s current heading upwards. As the heading
changes the picture will rotate. It doesn’t require heading information. It is the default value.
North Up : The Radar picture is stabilized and displayed with north upwards. As heading changes, the ship’s
Heading Marker moves. Requires a heading sensor connected to the chart plotter.
Track Up : The Radar picture is stabilized and displayed with the currently selected Course Leg upwards. As
heading changes, the ship’s Heading Marker moves. If you select a new course leg, the picture
rotates to display the new course leg upwards. Requires a heading sensor connected to the chart
plotter.
NOTE Head Up cannot be selected in True Motion mode.
To change the orientation mode follow this procedure:
[MENU] + "Orientation" + [ENTER] + select the desired orientation among
Head Up, North Up or Track Up + [ENTER]
2.1.5 Motion Mode
Allows choosing between two different presentation of targets and ship position over the
Radar screen Relative Motion (RM) and True Motion (TM). See the following table:
True : In True Motion, fixed Radar targets maintain a constant position on the screen, while your own
ship moves across the Radar image at the appropriate speed and heading. A map-like image is
thus displayed, with all moving vessels traveling in true perspective to each other and to fixed
landmasses. As your ship’s position approaches the edge of the screen, the Radar center offset
is automatically reset to reveal the area ahead of your ship.
Relative : In Relative Motion your own ship’s position remains fixed on the Radar screen and all Radar
targets move relative to your own ship. It is the default for the Radar display.
NOTE True Motion is only available in North Up and Track Up modes (not in Head Up
mode). Also True Motion requires a heading sensor and GPS position
information.