GPSMAP 521 and 521s GPS Chartplotter Fishfinder

Features an ultra-bright 5" QVGA display along with an improved high-speed digital design for faster map drawing and panning speeds. Plus, these waterproof units have a high-sensitivity internal GPS receiver, so mariners will always know their position at sea. It's ready to go with a built-in, satellite enhanced worldwide basemap and Garmin's proven easy-to-use interface designed to help mariners navigate the open waters with ease.

Features and Specifications:

• Ultra-bright 5" diagonal QVGA display, 240 x 320 pixels - over 800 nits of brightness
• NMEA 2000 certified for seamless integration with the Garmin marine lineup
• Preloaded worldwide marine basemap 
• Compatible with GXM 51 for XM Satellite Radio and XM WX Satellite Weather
• Built-in high-sensitivity GPS receiver
• High-speed processor for fast screen redraws and smooth panning
• Streamlined user interface makes it simple to select modes and features
• Single SD memory card slot for BlueChart g2 Vision cards, as well as saving waypoints, routes and tracks to an SD card
• Optional BlueChart g2 Vision cards provide marine chart detail and enhanced navigation features like Auto Guidance, satellite imagery, 3-D Mariner's Eye View and 3-D Fish Eye View
• Backlit keypad for easy operation in low light conditions
• Unit dimensions: 5.9"H x6.4"W x 2.9"D
• Add Sonar, GPSMAP 521s , comes with Dual Frequency Transducer that illustrates Depth Contours, Fish Targets and Structure.
• Owners Manual :  Download