Sperry Marine Visionmaster FT ECDIS, User Manual

Page: 92 / 531

Basic Operation of ECDIS ECDIS User Guide
3-24 65900012
Radar Overlay Mode
If your product type is an ECDIS with Radar Overlay, the following radar
overlay controls can be accessed from the radar overlay icon at the top of
the fixed toolbar area:

Radar Overlay On or Off

Radar Overlay transparency levels

Radar Overlay Settings window
Radar overlay can only be switched on when the system is in Transmit
mode, see Transmit and Standby Modes.
If your product type is an ECDIS without Radar Overlay, the area on the
fixed toolbar where the radar overlay button will be blank.
Switching the Radar Overlay On
When radar overlay is switched off or the system is in Standby,
the radar overlay icon is shows a white diagonal line through it.
Radar is switched off and the icon is displayed with a yellow background, in
addition to a black diagonal line, if one of the following happens:
1. The current scale ratio is outside the radar overlay limits
(1:500,000 or more or 1:3,000 or less, see Scale Ratio).
2. Ownship is too far from the centre of the
display area due to the display being moved
to a location via the Pan or Goto functions.
To turn the radar overlay on, left click on the icon,
or right click and select
Radar Overlay On . The
white diagonal line is removed and radar overlay is
shown on the chart display.
In primary and secondary presentation mode (see
ECDIS Presentation Options) radar overlay
appears in the primary chart window only.
Setting Radar Overlay Transparency Levels
The radar overlay icon enables the radar overlay transparency level to be
set. The default transparency level setting at power up is 60%.
To change the transparency levels right click on the icon and select from
the pre-set values (20%, 40%, 60% or 80%) or 100% for opaque. The
transparency of radar overlay shown on the display will increase or
decrease dependent on the level selected.
The settings made for the level of radar overlay transparency are persisted
after a system restart.