Humminbird 859ci HD for ice fishing?

[Lead-core]

Does anybody know if the bird ice transducer is compatable with this unit? Is is not Si or DI just the sonar/gps combo. I use it in the truck for gps on the ice but would like to use it for sonar as well if possible.

[matzilla]

http://www.humminbird.com/Products/XI-9-20/