Contour lines on GP-1650-WF??

[Theflyguy]

Does a GP-1650-WF device have capability of showing underwater contour maps? If so, how do I get these to display?

 

[Johnny Electron]

Normally the map inserted will offer some type of bathy lines and many times the chart companies offered special bathy maps you could purchase. These units are 30 years old and neither C-map or Navionics makes these types of maps anymore. If you need mapping, you would need to look on the used market at places like e-bay and such. The short answer is they can show bathy lines if you have them on the mapping card for the area you are using the machine.