Which HELIX 5 ...??
*HELIX 5 Sonar GPS
*HELIX 5 DI GPS
*HELIX 5 SI GPS
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Your HELIX can use LakeMaster or Navionics map cards ...
You can check the Navionics coverage for your lakes in their web app ...
Navionics Webapp
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You can check the LakeMaster coverage in their region cards ...
http://www.humminbird.com/Category/Support/Find-a-Lake/
You can also check into LakeMaster ChartSelect which allows you to purchase just one lake ...
http://www.humminbird.com/Category/T...y/ChartSelect/
The HELIX 5 is not Ethernet capable to link to the trolling motor ...
Rickie