I'm pretty sure submarines are lost more often than surface warships are - the difference between small incident and loss of ship is just so much smaller. And to confirm that I can't think of any surface warships that have been lost by the US or Russian navies out of combat since 1950, but both have lost several submarines in that same time period.

Your general point is correct. But the USS Guardian surface ship was lost when it ran aground in 2013. It didn't quite sink but couldn't be repaired.

Other entries would be USS Benevolence [0] in 1950, USS Hobson (DMS 26) [1] in 1952, USNS Mission San Francisco (T-AO-123) [2] in 1957, USNS Mission San Miguel (T-AO-129) [3] in 1957, USS Stickleback (SS-415) [4] in 1958, USS Grouse (AMS-15) [5] in 1963, USS Bache (DD-470) [6] in 1968, USS Frank E Evans (DD 754) [7] in 1969, USNS Sgt. Jack J. Pendleton (T-AKV-5) [8] in 1973 and USS La Moure County (LST-1194) [9] in 2000.

But I think that's the rest of the noncombat, post-1950 losses. Lots of support ships, DDs and a single sub.

And thanks for the mention of the USS Guardian - I had no idea the USN still operated wooden-framed ships!

0: https://en.wikipedia.org/wiki/USS_Benevolence

1: https://en.wikipedia.org/wiki/USS_Hobson_(DD-464)

2: https://en.wikipedia.org/wiki/USNS_Mission_San_Francisco

3: https://en.wikipedia.org/wiki/USNS_Mission_San_Miguel

4: https://en.wikipedia.org/wiki/USS_Stickleback_(SS-415)

5: https://en.wikipedia.org/wiki/USS_Grouse_(AMS-15)

6: https://en.wikipedia.org/wiki/USS_Bache_(DD-470)

7: https://en.wikipedia.org/wiki/USS_Frank_E._Evans

8: https://en.wikipedia.org/wiki/USNS_Sgt._Jack_J._Pendleton_(T...

9: https://en.wikipedia.org/wiki/USS_La_Moure_County_(LST-1194)