I have a boy who is a great scout...attends all the meetings/troop events, etc...the only thing keeping him from advancing to Second Class is his refusal (fear based) to learn how to swim.
So...whats the easiest way to tell him he is done with advancing in rank because the BSA will not let him advance any further without learning to swim?
Even scouts earning the Eagle rank are given alternatives to required merit badges which involve swimming.