prowler650:
Before you pull the trigger on the 1kw transducer, and adapter,
I'd search around the internet, and see if anyone with an 1197 gets good
readings at 300+ feet.
That is extremely deep for these units.
These units are designed mostly for shallow freshwater (Bass fishermen).
It is stated that they will work in water that is 1,500 feet, but will they give GOOD readings at that depth is the big question.