I know what is at the end of all of the mooring I have. They are inspected. And what is found is a minimum 400 lb
anchor with heavy chain and 1" diameter pennants. I back down on all moorings. This is good practice anyway to pull the chain back right away so as to "match" the other nearby boats.
On unknown moorings I back down under speed. This really puts a shock to the system. I don''t think many
anchors would hold. I have seen moorings drag their
anchors in hurricanes. I have seen
anchors drag in a few knot''s of wind when the current or wind changes direction.
Of course it''s doing it right that what really matters. They are both right answers then.
Time and time again it''s some anchored boat that drags down on me. Only once did a moored boat drag down on me in a hurricane.