(a) To qualify for an endorsement as able seaman authorized by this section, an applicant must provide satisfactory proof that the applicant
(1) is at least 18 years of age;
(2) has the service required by the applicable section of this part;
(3) is qualified professionally as demonstrated by an applicable examination or educational requirements; and
(4) is qualified as to sight, hearing, and physical condition to perform the seamans duties.
(b) The classifications authorized for endorsement as able seaman are the following:
(1) able seamanunlimited.
(2) able seamanlimited.
(3) able seamanspecial.
(4) able seamanoffshore supply vessels.
(5) able seamansail.
(6) able seamanfishing industry.