Change what is displayed on the chart

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Press the Anchoring button...

File:AnchoringButton.png to add detail to the chart that is useful for anchoring. Anchoring mode adds the following to the chart.

File:Anchorage.png Anchorage areas
File:Pipeline.png Under sea pipelines and cables
File:SandAndShells.png Nature of the sea bed
File:Sounding.png Soundings (in feet or meters depending on the units chosen

The Anchoring button affects both the Passage Planning view and the Route Monitoring view.

Press the Overview button...

File:ShowOverview.png File:ShowOverviewTab.PNG to see an inset on the bottom right corner of the Passage Planning view. This shows a wider geographic area centered on the Passage Planning view.

File:PassagePlanningOverview.png

This is a simplified 1/6th scale view covering four times the area of the main chart. It includes Routes and Areas, but not Lines or Annotations. The gray rectangle shows the area covered by the main chart.

The red lines show the limits of areas of a particular chart quality, indicated in each area by the CATZOC value and the year the chart was produced.

CATZOC Position
Accuracy
10m Depth
Accuracy
Meaning
A1 +/- 5m + 5% depth +/- 0.6m Full area search undertaken. Significant seafloor features detected 4 and depths measured.
A2 +/- 20m +/- 1.2m
B +/- 50m +/- 1.2m Full area search undertaken. Significant seafloor features detected 4 and depths measured.
C +/- 500m +/- 2.5m Full area search not achieved, depth anomalies may be expected.
D Worse than C Worse than C Full area search not achieved, large depth anomalies may be expected.
U Unclassified
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