Magellan MapSend BlueNav XL3 Charts for eXplorist U.S. West Coast/Hawaii Salt/Freshwater Map microSD Card Extra-large charts let you see your current position in relation to navaids, channels, moorings and a variety of underwater structures Based on highly respected Navionics Gold charts, BlueNav provides information about tides and currents, depth contours, navaids, port services and more Simply insert the SD card (pre-loaded with ready-to-use cartography) and instantly expand the capability of your SD card-compatible Magellan GPS receiver For use with the expandable Magellan eXplorist 400, 500, 600 and XL Detailed maps on pre-programmed secure digital cards help enhance your journey through the Western Coast of the United States and Hawaii