The Maptech Digital ChartKit 2001 CD-ROM combines official NOAA charts, navigation and aerial photos, topographic maps, a marine-facilities locator and tide and current information into one seamless package. Many of these functions can be overlaid on the NOAA charts, giving the user location-specific information. Available in the standard regions, CD-ROMs for each region sell for around $200. Kits with smaller coverage areas will be available for $50. Maptech, Inc., Andover, MA; (888) 839-5551; www.maptech.com.