C-MAP C-Map 4D

C-MAP 4D charts give you detailed coastal, lake, and river coverage on a chart card for your plotter. Pick the region you cruise for accurate navigation data. Choosing C-MAP 4D Charts C-MAP 4D charts load detailed marine cartography onto a card that slots into your chartplotter, so the first step is picking the right coverage region. Charts are sold by area code such as the NA series for North America, covering zones like the Great Lakes, coastal waters, and major rivers, so choose the chart that spans where you boat. Confirm your chartplotter brand and model support C-MAP 4D cards before you buy, since chart formats are not interchangeable across all displays. Many cruisers keep an adjacent chart on hand...