As the wording says, "basemap". The Insight USA is more detailed. But if you want real detail and better close inland views such as upstream rivers, channels, and other small bodies of water leading into the bays and major bodies of water, go with the Navionics Platinum Map cards. I bought the $200. version for the Texas / Louisiana coastal area.
Insight mapping delivers unprecedented inland mapping and coastal charting detail with lightning-fast screen display updates. Amazing contour shading lends life-like perspectives to bottom structure as well as topography below and above the water. Insight mapping choices include:
● Lake Insight™ inland mapping includes nearly 5,000 freshwater lake maps with life-like perspective of bottom structure and topography.Coverage includes the Great Lakes and more than 500 Fishing Hot Spots® Lakes!
● Nautic Insight™ offers a superior like-like view of coastal bottom structure with detailed coastal and offshore depth contours, plus nav aids, for the entire U.S. coastline.
● Insight USA™ combines inland and coastal coverage areas of Lake Insight™ and Nautic Insight™.
The Enhanced U.S. Base-map offers the same geographic coverage area as the Insight mapping, with over 100,000 bodies of water and 4,600 enhanced U.S. lakes with high detail lake shorelines and contours.
answered 1 year ago
- Springfield, MO