Sperry Marine Visionmaster FT ECDIS, User Manual

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Charts ECDIS User Guide
4-78 65900012
Chart Dangers
A safety checking feature periodically searches the chart database and
mariner objects database for objects that could endanger the safety of own
ship. For a description of this feature, see Safety Checking.
Safety Checking must be configured as an optional feature in system
configuration before the operator can view chart dangers, see
Chapter 1
`Configuration' in Volume 2 of the VMFT Ship's Manual.
When safety checking detects a dangerous object, a red flashing alarm
appears in the Alert Status Indicator and the Dangers icon to the right of
the Alert Status Indicator displays a red background with a brief description.
For a chart danger, the Warnings / Cautions
Danger icon will appear yellow, or if no alerts are
present it will be grey.
The status indicator will list the most recent chart
danger alert generated by the system. Warnings
will only be shown when all prior Alarm status
alerts have been acknowledged. Cautions will not
be shown.
Chart Dangers includes two tab folders, Danger
List and Settings. The Danger List enables individual dangers to be
selected and displayed and information on the object viewed. Settings
enable various display settings, alert priorities and look ahead controls to
be changed.
Chart Dangers divide dangerous objects into Safety Contour Crossing,
Navigational Hazards and Areas with Special Conditions lists. Each list
will be populated with chart dangers only if the object type has been
selected in Settings. The lists may include alarms, displayed with a red
background, which are objects or areas where the depth may be a risk to
safe navigation, and are usually generated when own ship is in, or
approaching, a port. Or cautions, which are usually generated to denote
vessel traffic or underwater objects and are displayed with a yellow
background. The objects are listed in order of age, with the most recently to
least recently discovered.
At the bottom of the Chart Dangers window is a
Display Object button. This button enables rendering of the selected
object by temporarily enabling its viewing group if this is not already
enabled, provided that the object is in a chart cell that is on display and
from the database that is currently in use.