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What are the large red circles all over the chart? How do I get rid of them?

April 26, 2017chart circles large red rid

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What are the large red circles all over the chart? How do I get rid of them?

1 Answer

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The large red circles are called ‘sectors’ and are used as navigational aids that allow you view the angles of lights. You may remove them by clicking on the ‘Lights and Buoys Display’ button (on the toolbar) and choosing ‘Sectors Off.’ Sectors are only available on Passport Vector Charts.