Description:

Ready for action right out of the box, the GPSMAP 478 comes preloaded with US marine detailed maps for the entire US coast, including Alaska and Hawaii. For serious fishing, pair the 478 with the GSD™ 21 remote sounder, which offers 4,000 watts of power peak-to-peak (500 watts RMS) with a dual-frequency transducer (purchased separately). These maps are based on BlueChart g2 technology, so they layer smoothly and are integrated for easy panning, scrolling and zooming. When you're ready to drive home, take your 478 out of its marine mount and pop it into the automotive mount in your vehicle. 

Features:

• Garmin sonar compatible
  
• Supports DSC (displays position data from DSC capable VHF radio)
  
• Audible alarms
  
• Tide tables
  
• Hunt/fish calendar
  
• Sun and moon information
  
• Automatic routing (turn by turn routing on roads)
  
• XM WX Weather & Radio for U.S. compatible
  
• Voice prompts (e.g. "Turn right in 500 ft.")
  
• Headphone jack/audio line-out
  
• Portable
  
• Automotive/motorcycle-friendly

Details:

• Unit dimensions, WxHxD:  5.7" x 3.2" x 1.9" (14.5 x 8.1 x 4.8 cm) 
  
• Display size, WxH:  3.0" x 2.2" (7.6 x 5.6 cm) 
  
• Display resolution, WxH:  480 x 320 pixels 
  
• Display type:  256-color TFT 
  
• Weight:  13.6 oz (385 g) 
  
• Battery:  rechargeable internal lithium-ion 
  
• Battery life:  up to 15 hours 
  
• Waterproof
  
• Antenna:  detachable 
  
• NMEA input/output:  NMEA 0183

Includes:

• GPSMAP 478
  
• Preloaded U.S. marine detail maps (g2 technology)
  
• Preloaded City Navigator NT North America maps (full coverage)
  
• Trip & Waypoint Manager
  
• USB cable
  
• Power/data cable
  
• Marine mount
  
• Automotive mount
  
• Universal friction mount
  
• Vehicle power cable
  
• AC charger
  
• Protective cover
  
• Owner's manual
  
• Quick reference guide

Click Here for Mounts and Accessories!