CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER T—SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) (parts 175 to 186) > PART 178—INTACT STABILITY AND SEAWORTHINESS > SUBPART C—Intact Stability Standards (§178.310 to §178.340) > 178.325—Intact stability requirements for a sailing vessel.

178.325—Intact stability requirements for a sailing vessel.

(a) Except as provided in paragraphs (b), (c) and (e) of this section, each sailing vessel must undergo a simplified stability proof test in accordance with § 178.330 of this part in the presence of a Coast Guard marine inspector.
(b) Each of the following sailing vessels must meet the intact stability standards of §§ 170.170 and 171.055 in subchapter S of this chapter:
(1) A vessel to be operated on exposed waters;
(2) A vessel to be operated during non-daylight hours;
(3) A vessel of unusual type, rig, or hull form, including vessels without a weathertight deck, such as open boats;
(4) A vessel that carries more than 49 passengers;
(5) A sailing school vessel that carries a combined total of six or more sailing school students or instructors;
(6) A vessel on which downflooding occurs at angles of 60° or less; and
(7) A vessel which has a cockpit longer than Length Over Deck (LOD)/5.
(c) A catamaran must meet the intact stability requirements of § 171.057 in subchapter S of this chapter while under sail as well as the intact stability requirements of § 170.170 in subchapter S of this chapter or § 178.320 under barepoles (if an auxiliary sailing vessel) and with storm sails set and trimmed flat (if a sailing vessel).
(d) A sailing vessel that is not listed in paragraph (b) or (c) of this section and operates on partially protected waters must be equipped with a self-bailing cockpit.
(e) The cognizant OCMI may perform operational tests to determine whether the vessel has adequate stability and satisfactory handling characteristics under sail for protected waters or partially protected waters, in lieu of conducting a simplified stability proof test.
(f) Commanding Officer, Marine Safety Center, may prescribe additional or different stability requirements for a broad, shallow draft vessel with little or no ballast outside the hull.