The best replacement for chartplotter is gps.

The best alternatives to chartplotter are rated as following:
★★★★★  gps
  sounder

Your alternative for chartplotter is not listed? Suggest!
Speaking about chartplotter, one probably shouldn't forget about fishfinder.

Other search terms related to chartplotter and their ratings are:
★★★★★ fishfinder
★ uhf
You have in mind a companion for chartplotter and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of chartplotter in all years. Click on graph for more.
chartplotter
gps
sounder