Re: Hummingbird Transducer Cable
If your break is right at the transducer, there is not much that you can do. If it was further up, splicing might have worked. You just have to be careful with the shielding and resealing if below water line. I do not believe the HB are "tuned" to any length, because you can add numerous lengths of extension cables, splitters, etc, without any recalibration.
Start watching ebay. The 200DX used a two prong connector, so there will not be allot of other HB units transducer that will work with yours.
Another thought, since your wire connection hasn't broke all the way through, you might be able to add some wire support and allot of epoxy to hold in place.