What kind of Navy ship does the designation "USS YR 47" stand for?
I don't know, but I do know about the USS Liberty on June 8, 1967.
YR is a designation given to a non-propelled service craft, a "floating workshop". Please forgive the previous poster; he, undoubtedly, has issues.
It is a floating, mobile workshop. Most likely a large barge.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them