Sperry Marine Visionmaster FT ECDIS, Руководство пользователя

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Navigation Tools ECDIS User Guide
5-46 65900012
Anchor Track
Anchor Track enables a true head bearing to the anchor point to be entered
or selected on the chart display out to a distance of 5000 yards. The head
bearing value is displayed on the chart at the start of the head bearing line.
The head bearing is the planned course to steer as the ship approaches
anchorage.
To enter a head bearing, either click in the Head BRG field and move the
trackball left or right to set the bearing angle.
Alternatively an object on the chart display may be selected as a head
bearing marker (HBM). To select a HBM click on the On Chart button,
move the cursor to the object or location on the display and left click.
The head bearing is drawn at the opposite bearing to the value entered,
e.g. if you enter a value of 90º the system draws an anchor track at 270º.
Range Rings
The range rings provide a quick visual indication of the distance from
ownship to the Anchor Point.
When anchor approach is displayed (see the figure in Display) the following
types of range rings are displayed:
•
Inner range circles
•
Outer range circles
The Inner Interval and Outer Interval values show the spacing interval in
metres between the circles. To change the spacing interval click in the field
and move the trackball left to decrease, or right to increase the value. The
inner interval range is from 1 to 100 metres in 1 unit increments; the outer
interval range is from 5 to 500 metres in 5 unit increments.
Drop Objects
Drop Objects are conspicuous landmarks that are used as aids to
navigation in approaching the Anchor Point.
There are two types of drop objects:
•
Drop Range Object
•
Drop Bearing Object