Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Annex A – Static Site
65900012 Annex A-5
Target Anchor Watch
Target anchor watch enables the operator to verify that vessels at anchor
are not drifting by assigning an anchor watch to a target.
An anchor watch comprises a dotted line circle centred on the target's
anchor position, and a small anchor symbol next to the target's symbol.
Any targets may be selected for anchor watch. If a sleeping AIS target is
selected, the AIS target is made active.
To create a target anchor watch, do the following:
1. Right click on the target to be selected
for anchor watch. From the semi-
transparent context window click
Select Anchor Watch. An anchor
watch circle is drawn, centred on the
target's position.
The anchor watch circle radius defaults to 0.20 NM. To change the radius
for each target independently:
1. Select the target and navigate to the Target Data folder of the
Selected Target sub menu. When Anchor Watch is enabled, this
folder shows additional Target Anchor Watch data at the bottom of
the window.
2. To change the radius left click in the Circle
Radius field, hold down the left key and
move the trackball left to decrease the circle
size, or right to increase. The range is from
0.05 to 1.0 NM.
If a target exits its anchor watch area, the watch
circle, anchor symbol and target bearing line change to
a flashing red colour and a Target Anchor Drift warning
is raised. When the Target Anchor Drift warning has
been acknowledged, the symbol and lines stop flashing
but continue to be shown in red.