Section 173.053 - Sailing school vessels(a) In addition to the requirements in §§ 173.054 through 173.063 , each sailing school vessel must comply with the provisions of subpart A of part 171 of this subchapter.(b) In addition to regular passengers, for the purpose of complying with §§ 171.070 through 171.073 and § 171.080 , the following will also be counted as passengers:(1) Sailing school students.(2) Sailing school instructors.CGD 83-005, 51 FR 924, Jan. 9, 1986