Reference Manual Part 2

G-Series Reference Manual 144
Expansion
The expansion function allows you to either override the pulse
length or to give larger returns so targets are easier to see.
To override the pulse length
1. Open the Radar Setup Menu. You can either use the MENU
button, or press and hold the EXPANSION softkey.
2. Set the magnification level for target expansion to HIGH.
To give larger returns
1. Open the Radar Setup Menu.
2. Set the magnification level for target expansion to LOW.
Note: Selecting this option may compromise target resolution.
Wakes
When the wakes function is switched on, you can see the direction
and speed of moving targets relative to your boat. Targets are dis-
played in yellow, turning to paler shades of blue as the signal
diminishes.
The wakes option is a local setting which applies only to the display
on which you are working. You can choose to display wakes for a
period of 10 seconds, 30 seconds, 1 minute, 5 minutes or 10
minutes.
To switch wakes display on
1. Press the ENHANCE ECHOES softkey.
2. Toggle wakes to ON using the WAKES softkey.
3. Select your preferred wakes setting.
4. Press OK.
To switch wakes display off
1. Press the ENHANCE ECHOES softkey.
2. Press the WAKES softkey.
3. Press the CLEAR WAKES softkey.
Scan to scan
When scan to scan is switched on, stationary objects appear stron-
ger with each sweep of the radar. If the object moves, it appears
relatively weakly on screen.
This can be used to reduce the effects of rain and sea clutter.
To switch scan to scan on or off
1. Press the ENHANCE ECHOES softkey.
2. Toggle to ON or OFF using the SCAN TO SCAN softkey.
3. Press OK.
11.9 Radar range
You can zoom in or out to view the radar display at different scales.
The scale is measured from the centre to the top of the window and
is displayed in the left-hand corner of the status bar.
• Short-range scales show nearby objects in greater detail, and
are most suitable as you approach coastlines, harbors, or other
vessels. The shortest range available is 1/8 nautical miles.
• Long-range scales provide the best overview of the vessel’s
relationship to landmasses, weather fronts and large ships with-
in or beyond your field of vision. The longest range available is
72 nautical miles, depending upon the scanner fitted.
To change the radar range
1. Zoom to your required scale using the RANGE button on the
keyboard.
Synchronizing radar range and chart scale
The chart application includes an option to synchronize the radar
range with the chart scale.
When synchronization is switched on:
• The radar range in all radar windows changes to match the
chart scale.