new fishfinder xducer question?

[WillyC]

A good friend of mine just bought a new 30' Grady. Last weekend we were in 3000' of water and his fishfinder lost the bottom at about 2300' All of his electronics are Furuno. Not sure about the specifics of his transducer (I think its a 10000 kw) but it is a shoot thru.

[peterb]

I am pretty sure that after around 2,000+ that is a limitation of ff and ducers in gerenal (at least the ones that i have seen)

I mean at that point what's the difference between 2,000 and 3,000 feet (most people fishing these waters would have GPS contour maps that showed them this)? For example, I don't think that i am going to be wrecjk fishing at this depth.