[Grimmy]

Step 1. Know how to swim.
Step 2. Swim.
Step 3. While swimming, don’t get ran over by a ship or boat.
Step 4. While swimming, don’t get eaten by a shark.
Step 5. While swimming, don’t drown.
Step 6. While swimming, aim for other side of the strait.
Step 7. Swim all the way to other side of strait.
Suggestion: Try to swim to other side of strait, straight.

[GreyFriar]

You forgot to mention the tides that can take a swimmer into either the Mediterranean Sea or the Atlantic Ocean.

[TexasGator]

“Step 6. While swimming, aim for other side of the strait.”

And you may not make landfall.

[Steve Van Doorn]

said, "Step 3. While swimming, don’t get ran over by a ship or boat."

Have a small boat follow you. Pluck you out of the water before you're ran down.