Garmin GPS Map 232 Help

[Consigliere]

Recently aquired a Garmin GPSMAP 232 as part of a used boat purchase.  The basemap has Lake Ontario on it but no contours, just shows shorelines.  It is only compatible with the old BlueWater series of Garmin chips which seem to be difficult to find but can be had. 

 

My question is, is there anyone out there running this finder/chip?  What are the details of the contours available?  I have a Humminbird 987c SI on my old boat that I may move over and it has Navionics Gold on it but would rather just get a new chip for the Garmin if the detail is the same and sell the old finder. 

 

Any info, experience would be appreciated, especially a picture showing the map details/contours.