Marine Navigation App offers access to NOAA marine vector charts, freshwater lake maps, USACE inland river maps. Only marine GPS app to have route assistance with Voice Prompts for marine navigation. It has route manager to create new boating routes or import existing GPX/KML routes. It supports Nautical Charts course up orientation. Includes Tide & Currents prediction. * Hardware/GPU accelarated vector charts (text stays upright on rotation). * Voice Prompts for marine navigation (requires GPS ) * 1ft / 3ft depth contour maps for anglers for selected lake maps. * Supports GPX/KML for boating route editing/import. * Tide & Currents prediction. * Seamless chart quilting of marine charts * Enter way points * Record tracks, Autofollow with realtime track overlay * Voice Prompts for marine navigation (requires GPS ) -prompts when approaching a boating route marker -Continous distance and ETA updates -Alerts when sailing/boating off route -Alerts when boating in wrong direction *Route Editing/Creation -Create routes from scratch -Edit existing GPX/KML routes. -Add custom description to any route point. -Drop markers along route. * Offline NOAA marine, lake & river charts -Visually download using grid -Textual search * Tide & Currents - High / Low tides. - Tidal Currents. - Active currents stations. *Seamless chart quilting of marine charts *Distance Bearing tool *Create custom way points - Using GPS -Select point on map -Manually enter latitude & longitude coordinates *Pan/Zoom/My Location * Record Marine GPS tracks * View tracks overlay * Live track animation * Track analytics/stats * Export GPX trcks. -Export to SDCard -Share GPX tracks with friends. * Auto Follow Mode (Course up) -Continuously updates boat's location on chart - Adjustable update frequency Sample Nautical Charts (please visit http://gpsnauticalcharts.com/main/folio-catalog-nautical-charts-app for complete list) SUGARLOAF KEY-KEY WEST PORT RICHEY TAMPA BAY - CLEARWATER HBR EAST BAY-WEST BAY FLORIDA ST JOSEPH, ST ANDREW BAYS INTRACOASTAL WATERWAY MATECUMBE-GRASSY KEY CHESAPEAKE BAY CAPE CHARLES-NORFOLK HARBOR ANCLOTE KEYS-CRYSTAL RIVER ST JOSEPH SOUND MIAMI HARBOR Minnesota lakes - Kabetogama, Minnetonka, Waconia,Leech,Mille Lacs Lake Keowee,Jocassee,Hartwell,Greenwood,Lake Murray Mark Twain,Ozarks,Table Rock Lake St. Clair Lake Kentucky KEY WEST-THE MISSISSIPPI RIVER SAN PEDRO CHANNEL LAKE MICHIGAN STONY LAKE-POINT BETSIE APALACHICOLA BAY-CAPE SAN BLAS EAST CAPE-MORMON KEY CAPE HENLOPEN-INDIAN RIVER INLET CHESAPEAKE BAY CAPE HENRY-THIMBLE SHOAL LIGHT DULUTH-SUPERIOR HARBOR MONHEGAN ISLAND-CAPE ELIZABETH LAKE ONTARIO - CLAYTON-FALSE DUCKS ISL Lake Winnipesaukee SAN FRANCISCO ENTRANCE MIAMI-MARATHON, FLORIDA BAY CAPE MAY-FENWICK ISLAND MISSISSIPPI RIVER-GALVESTON CAPE CANAVERAL-KEY WEST DELAWARE RIVER WILMINGTON-PHILADELPHIA FLORIDA KEYS SOMBRERO KEY-SAND KEY SAN PABLO BAY RAINY LAKE BIG ISLAND MINN-OAKPOINT ISL ONT INTRACOASTAL WATERWAY - BISCAYNE BAY EVERGLADES NTL PARK - SHARK RVR-LOSTMANS RVR MIAMI-MARATHON & FLORIDA BAY BLACKBURN BAY LAKE HURON LAKE TAHOE STRAITS OF MACKINAC NORFOLK HARBOR & ELIZABETH RIVER SAN DIEGO-SANTA ROSA ISLAND DELAWARE BAY CHOPTANK RIVER CAMBRIDGE-GREENSBORO FORT LAUDERDALE PORT EVERGLADES ST SIMONS SOUND-TOLOMATO RIVER CHESAPEAKE DELAWARE CANAL CAPE MENDOCINO STRAIT OF JUAN DE FUCA ENTRANCE PORT RICHEY CLEARWATER HBR PAMPANO BEACH-HALLADALE FLORIDA LAKE ERIE LAKE MICHIGAN INCLUDING GREEN BAY MAIMI-MARATHON and FLORIDA BAY SANTA CATALINA ISLAND APALACHICOLA BAY-LAKE WIMICO Battery Disclaimer: "Continued use of GPS running in the background can dramatically decrease battery life."