Garmin 010-10680-50 Blue Chart User's Guide - Page 8

Introduction BlueChart is Garmin's exclusive marine cartography, which works with compatible Garmin units. BlueChart's detailed electronic nautical charts look like paper charts when displayed on your Garmin unit or on your PC. BlueChart data is available in three formats: • Preprogrammed Garmin data card or microSD™ card-contains detailed maps based on map coverage regions. Garmin cards work only with compatible Garmin units. • MapSource software-contains detailed maps that you can load onto Garmin data cards, microSD cards, or SD™ cards; or you can load directly to compatible Garmin units. This offers more flexibility in choosing specific maps within a coverage area. For information about purchasing BlueChart cards, see page 19 of this guide. For information about transferring MapSource maps to a card or a Garmin unit, see the MapSource Help file. Understanding BlueChart Features Features common to most BlueChart data include: • Graphic symbols to denote map features (see page 6). • Depth contour lines (with deep water represented in white) • Inter-tidal zones (displayed in green on color units) • Spot soundings, as depicted on the original paper chart • Navigational aids and symbols • Obstructions and cable areas  BlueChart User's Guide