Garmin GPSMAP 3005C Features:

WAAS-enabled, 12 parallel channel GPS sensor with 30-foot cable
Use individually or connect and control multiple displays and sensors with built-in high-speed network
View XM WX Satellite weather overlays with optional GDL 30/30A weather/audio receiver
Add sonar with optional GSD 20 remote sounder; dual-frequency, 500 watts RMS
Unit dimensions: 7.8″ W x 4.7″ H x 3.0″ D (197 mm x 120 mm x 75 mm)
Single, front-loading card slot accepts pre-programmed data cards
5″-diagonal, 256-color TFT, full VGA, sunlight-readable display
Weighs approximately 1.8 lbs.
Backlit display and keypad
Permanent user data storage; no memory battery required
Meets rigid IEC 60529 IPX7 submersible standards
Built-in worldwide basemap showing cities, interstates, coastline detail and U.S. tide stations
Compatible with Garmin’s BlueChart marine cartography and most MapSource products, including Fishing Hot Spots and Minnesota LakeMaster
4,000 user waypoints with name and graphic symbol; 50 reversible routes with 300 waypoints/route
10,000 point automatic track log; 15 saved tracks let you retrace your path in both directions; 700 points/saved track
Position formats include Lat/Lon, UTM, Loran TDs, Maidenhead, MGRS, and user grid
Audible alarms for anchor drag, arrival, off-course, shallow water, deep water, proximity waypoint, clock, and battery
Large-numbers option for easy viewing
Course and speed filtering
Built-in celestial tables for sun and moon calculations
Package Includes:

GPSMAP 3005C
GPS 17 WAAS-enabled sensor
Power/data cable
Bail mount
Unit cover