This basemap comes factory installed with the GPSMAP 175, 180, 185, 215, 225, 230, and 235.

Please note: Garmin mapping units come with built-in, permanent basemaps that cannot be altered. These basemaps come in a variety of global designations (ie., Atlantic basemap). Please see your local dealer when purchasing a Garmin mapping unit to ensure that you purchase one with a basemap that's appropriate for your location and needs. Factory-installed basemaps cannot be altered.

The Marine Detailed basemap includes worldwide coverage of the continents down to a 64 nm range.

The standard map coverage for the Marine basemap includes:

1. Oceans and rivers
2. Lakes greater than 30 sq. miles
3. Principal cities with population greater than 20K
4. Major interstates and/or motorways and principal highways
5. Political boundaries (state and international border)

1. United States, including Alaska and Hawaii - In addition to the standard map coverage, it also includes:
   1. Coverage down to a 32 nm range
   2. Lakes greater than 5 sq. miles, major streams and rivers
   3. National and State level roads, plus some local roads in or near urban areas
      
      
2. Western Europe -In addition to the standard map coverage, it also includes:
   1. Lakes greater than 5 sq. miles, major streams and rivers

Specifications are subject to change without notice.