A "swim" means being forced from your boat.
I say that you were forced out of your boat and didn't plan on it. In that case you swam like a fish and don't deny it. Fish boy.
Really though, there is no shame in swimming, so this should not even be an issue. Besides, who cares if you need a certain amount of water on your head to constitue a swim or that being able to leap from boat to dry shore is not a swim. Whatever, you both came back safely after what was probalby another great day on the water and I'll drink to that anyday.