  North Atlantic Ocean
+B557 Passage Chart
Imray Chart (100)
aka: Atlantic Routeing Chart
NA100
At a scale of 1:7,620,000 this chart covers the North Atlantic from Brazil to Newfoundland and Gibraltar to the Caribbean. Interestingly it has been constructed on a conical projection which means that Great Circle tracks can be plotted as straight lines rather than curves. The chart shows the main trend of contours, limits of ice, magnetic variations and keys routes as identified by D M Street.
On the reverse are notes on the routes and small wind rose charts, with accompanying charts showing excessive wave heights and storm frequencies for the months that yachts cross the Atlantic: April to July and October to December.
Chart 100 will be an important companion for Atlantic Yachtsmen on passage and an excellent source of planning information.
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