Doc Watson The Swimmer

Doc is not a good swimmer despite the fact he is Australian.
After 3 years of lessons he passed his herald which meant he could swim 25 yards.
Two years later so that he would be allowed to swim in the school pool he managed to swim 50 yards.
As a teacher he was only allowed to teach swimming if he remained out of the water.
Now he just does a sort of dog paddle to keep himself afloat.
He can swim freestyle , but only if his head stays above water.