LikeJose,
What you can use is a type of transducer switchbox. This would allow you to connect two different transducers to the switch box, and then connect the switchbox to the GP1971's transducer port.
This is a way you can switch over to the transducer that you want to utilize (either the CW or CHIRP Transducer). However, you would still have to select the transducer model being used in the GP1971's transducer setup menu.
AIRMAR used to make the transducer switchbox 333 AF, but I don't think that it's in production any longer....
View attachment 6491
- Deep Blue