8. CHART ALERTS
8-4
8.2 How to Activate Own Ship Check
Calculation of own ship predicted movement area is done using a check area (two
places) about own ship position. Set the check area as follows:
1. Select the [Look-ahead] page from the [Overlay/
NAV Tools] box.
2. Referring to the figure below, set the ahead time
or distance and ahead width. Also, set the
"Around" figures: port, starboard, bow and stern
check distance.
The reference point is the conning position
(CCRP).
Both areas are shown as a thin black line one
screen.
3. To select the objects to use in chart alerts, click the [Chart Alert] button and see
section 8.1.2.
4. Click the [Apply] button to affect the changes.
When an object set from the [Chart Alert] menu enters a set area, an alert is generated
in the following manner:
Objects or areas that generate an alert are shown in the following manner. (Alarms:
red highlight, Warnings/Cautions: yellow outline)
• Alarm or Warning level alerts: Alert message and aural alert are generated.
• Caution level alerts: Alert message is generated (no aural alert).
• Individual objects: The object is highlighted in red or outlined in yellow.
•
Area objects: If the area object is larger than the look-ahead area, the look-ahead
area is highlighted in red or outlined in yellow. If the area object is smaller than
the look-ahead area, the area object is highlighted in red or outlined in yellow.
Width
Distance
BowBow
Stern
Port
Starboard
Ahead: Sets an area with a length
based on own speed (Time) or
distance (DIST) ahead of your ship.
The [Width] setting is applied to
either [Time] or [DIST], depending on
your selection. The area set here is
always oriented based on your
course (COG).
Around: Sets a fixed area around
your ship. This area moves with your
ship, in relation to your current
heading (HDG).
CourseCourse
HeadingHeading
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