There are specific circumstances that HB can share 2D sonar data to/from a DI model unit:

1. With 6.570 software a 8/9/1158c DI (or HD DI model) can share (subscribe to) the 200/83kHz or 50/200kHz sonar data from another non-DI model unit as they can be set to use this type of transducer. Effectively setting the 8/9/1158c DI unit to one of these transducer settings makes it a 8/9/1158 (non-DI) model unit.

2. With 6.570 software a non-DI model unit can now subscribe to only the 200kHz part of the DI units 2D sonar. The 455kHz 2D sonar will still work in the DI model unit and the DI sonar data is not shared since the non-DI unit does not have this capability.