uncle pennybags
Double Eagle Member
OTHER THAN A LARGE POND RAKE....
You pretty much need to see the disc for any retriever to be reasonably successful.
I'm not saying you can't recover a disc by randomly throwing a retriever into a pond, or randomly reaching out with a claw/holding attachment on a pole, but....
If you don't have a visual on your disc, good luck getting it back. :|
Lake rakes have drawbacks too. I've busted 3 of my homebuilt ones on the "natural fill" in my ponds. (busted up cinderblocks :wall That said they are about the only reliable way to pull out discs unseen. Golden retriever types have some angle dependency to actually get the disc.