The Royal Navy sometimes outnumbered Germany in submarines

Which non-Bismarck naval misconception is worth correcting?

The Royal Navy sometimes had more submarines than Germany, with the immediate prewar period offered tentatively as an example.

The Royal Navy is said to have possessed more submarines than Germany at several points. Dan tentatively identifies the period just before World War I as one example. This is a brief correction to the impression that early submarine strength belonged chiefly to Germany. No fleet totals or detailed comparison of capabilities are given.