Garmin GPSMAP 421S GPS Chartplotter Fishfinder Combo Transducer

GPSMAP 421S Chartplotter/Fishfinder Combo - Without Transducer

Features an ultra-bright 4" 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. They are ready to go with a built-in, satellite-enhanced worldwide basemap and Garmin's proven easy-t0-use interface designed to help you navigate the open waters with ease. Both models are compatible with various NMEA 2000 components, inculuding Garmin's full lineup of NMEA 2000 marine sensors and autopilots.
Features and Specifications:

Ultra-bright 4" 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
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 a 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: 5.0"H x 5.7"W x 2.7"D (12.7cm H x 14.5cm W x 6.9cm D)
Power output: 500 watts (RMS) 4000 watts (peak to peak), dual frequency
Depth: 1500 feet/500 meters (dual frequency)
Use a dual frequency transducer 50 kHz (45 degrees), 200 kHz (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.