Why St Vincent is a candidate for least effective Sea Lord

Who was the least effective Sea Lord?

St Vincent is a strong candidate because his conflict with the Navy Board repeatedly threatened the availability of ships.

St Vincent is a strong candidate because his conflict with the Navy Board repeatedly threatened ship availability. His interference nearly left the Royal Navy short of ships at several points. Beatty also attracts criticism for temporarily surrendering control of naval aviation. The judgment still allows that Beatty achieved useful things in other areas.