Premise: "A man in a snorkel is swimming in the water viewing aquatic life."\nHypothesis: "The man is out swimming."\nIs the hypothesis entailed by the premise?\nOptions:\n- yes\n- it is not possible to tell\n- no
A step-by-step solution is:
yes
A man is swimming and The man is out swimming means the same thing.

.

So, the final answer is yes