So I may need to re-watch this part to confirm, but if I remember correctly, Locke was not wet when he entered the sub, but he was soaking wet after he left the sub and was being held at gunpoint on the dock. Why was he wet? He didn't need to swim to get to the sub to enter it, why was he in the water after he left the sub? Could it possibly be because he moved the sub away from the dock somehow, swam back, and faked blowing it up? Not sure if he would know how to move a sub, but either way, why was he so wet?