Another Humminbird Question - 981c SI

[5alive]

I know this unit does not have the GPS map, but has plot tracking GPS, my question is: If this unit is linked to a unit with the mapping, or a mapping chip is installed, can the 981c SI read the chip or other units map? Thanks, I know this unit is discontinued, but I have found a great deal on a leftover unit.

[BryanP]

Unfortunately, the answer is no. 

[5alive]

Thanks, Bryan, I also here the sidefinder tranducer on this unit (981c SI) has less power and a narrower cone. Is this true? Is this unit worth the cash, just as a SI???