The 521s GPS Combo has 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 also comes 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
* Power output: 500 watts (RMS) 4000 watts (peak to peak), dual frequency
* Depth: 1500 feet/500 meters (dual beam)
* Use a dual frequency transducer 50 kHz (45 degrees), 200kHz (10 degrees) for maximum saltwater performance
* Patented transom/trolling mount transducer
* UltraScroll high rep rate sonar provides lightning-fast screen updates
* AutoGain technology enhances target visibility
* See-Thru technology shows weak and strong returns simultaneously
* Water temperature log graphically records water temp data
* A-scope
* Whiteline
* Adjustable depth line helps gauge desired fishing levels and bottom clearance
* Split zoom display offers a closer look at fish targets and bottom structure
* 2X, 4X, and bottomlock zoom
* Adjustable keel offset
* Alarms for fish size, shallow water, deep water, and low battery

Frequency
50/200
Internal/External Antenna
Internal
Resolution (VxH)
234 x 320
Screen Size
5"
Screen Type
Color
Speed/Temp
Temp Only
Touchscreen
No
Transducer Type
Transom Mount
Waterproof Rating
Waterproof
Waypoints/Routes
3000
Weather Capable
Yes
Cartography Type
Bluechart Vision
Basemap
Yes
Card Format
SD
Cartography - Preloaded
No
Cartography Brand
Garmin