You should join the Coast Guard!

Coast Guard

The U.S. Coast Guard is the smallest military branch with peacetime missions including law enforcement, boating safety and sea rescue. It's a small branch, so it's selective, but being less specialized means greater potential for a wider range of job experiences.

You've got good "sea legs" and peacetime missions appeal to you, making the Coast Guard a good choice, but you also relish the idea of being able to rush to the aid of a stricken vessel as a fearless hero!