C-MAP 4D NA-D931 Lake Michigan

The next evolution in navigation solutions. C-MAP 4D adapts to your boating
needs because it's the only digital chart that offers advanced features and
lets you add data and services as they become available.

Full 4D Content
When you choose Full 4D content you will experience the latest in navigation
data and technology such as:

• 3D Chart View - The world has three dimensions.
  When you add the 4th dimension of time - meaning consistent, periodic
  updates - you combine the most detailed 3D height and depth worldwide
  database with a continuous update process to give you a personalized
  navigation experience with up-to-date data for safe navigation.
  
• High-Resolution Satellite Imagery - See the real world on your
  screen.
  C-MAP 4D includes a navigational perspective with high-resolution coastal
  imagery overlaid on the most accurate and up-to-date vector data, plus
  thousands of extraordinary photos for the most popular marinas and areas of
  interest.
  
• Digital Raster Charts - Innovate tradition.
  With raster charts, you have an additional reference source for navigational
  awareness. Get "at-a-glance" information using the nautical paper charts
  overlaid on the multi-dimensional shaded relief to have a new visual
  experience.
  
• Easy Routing - Automatically create a route.
  Enter start and end points along with specific boat parameters and
  automatically receive waypoints of the shortest route; highlights potential
  hazards and displays varying levels of alerts for each segment of the route,
  allows you to manually adjust the route.
  
• Guardian Alarm - An extra layer of safety.
  When activated, Guardian Alarm performs an automatic forward-scanning check
  for obstacles. Use the feature as an added backup to alert you should you
  head toward a potentially harmful object.
  
• Detailed NavAids
  
• Route Check
  
• Detailed Marina Charts
  
• C-Marina Ports Database
  
• Multi-Language Capability
  
• Dynamic Tides & Currents
  
• Photos & Diagrams
  
• Depths & Land Elevations
  
• Perspective View

Specifications:

• Card Format: MicroSD/SD
• Box Dimensions: 1"H x 6"W x 10"L WT: 0.1 lbs