Gold Needle:
The
German "U" Boat that I mentioned, is going to be much easier/cheaper, to salvage/locate/ & to dive on!
Than the one you are referring to in San Francisco Bay!
First off!
I have seen u/w actual photos of this/the "Bot" ...
Not! Taken by me, but by the original finder, now deceased!

It is in about
60/70 foot (deep) of water, clear water too!
Not like the conditions, anything like, around S.F. Bay ! :P
AND!
There are no currents, like there are in San Fran Bay !
Besides, I live here and have been to, camped on the shore, opposite & within 1 1/2 miles of this
"scuttled" ( NOT SUNK!) Sub!
The logistics of a "salvage dive" in California, for me, would be "Horrendous" !
Why hasn't anyone out there done a "dive" ?
Or! Atleast
Dropped an U/W Camera down on it, to see or prove it's exsistance ?

They're, U/W cameras, are not all that expensive, I own two of them !
OH!
By the way,
"ROV" = Remote Operated Vehicle"!
In this case, U/W ROV !
I'm working on building one, right now!