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chart quilting Chart quilting means that when a series of adjacent echarts are shown on the screen at the same time, the program trims off the borders and matches them up properly along the edges. This offers a convenient, continuous overview of the charts available, but at the expense of a periodic mismatch in scale, and sometimes even of depth contours. See discussion in the textbook. Some navigation programs default to showing one chart at a time and then offer a setting to turn on chart quilting. Other programs like qtVlm, default to showing all loaded charts in a quilted pattern with the option to show only one of them (right click and choose)—or you can start by loading just one instead of a set of charts. In qtVlm and other programs, the view of a single raster chart (RNC) will add the borders to the chart as well. US RNC have valuable information in the borders, but the Canadian RNC include even very much more information in the borders much like a mini set of Sailing Directions for that region. ENC have no borders to begin with, so there is nothing to see there, but they can still be viewed individually which can be instructive when changing display scales.

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