2008 REED’s East Coast Edition - Weather
Figure 4 A surface analysis chart provides a wealth of information on winds, fronts, and pre-
vailing high- or low-pressure systems, and can be invaluable tools in planning and executing
coastal and offshore voyages.
marked in 10-degree increments. Each sur- charts are produced on polar stereographic
face chart is issued in two parts overlapping projections.
by ten degrees of longitude: between 40 to 50 Surface analysis charts provide a wealth of
degrees west in the Atlantic, for the surface invaluable information in planning passages
charts representing the eastern and western or at sea (see Figure 4).
Atlantic (the Gulf of Mexico is included in As previously illustrated, fronts are indicat-
the latter); and between 165 to 175 degrees ed by lines studded with solid black symbols
in the Pacific, for the surface charts repre- (arrows for cold fronts, half circles for warm
senting the eastern and western Pacific. Polar fronts, a combination of both for occluded
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