CFR > Title 46 - Shipping > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER S—SUBDIVISION AND STABILITY (parts 170 to 174) > PART 170—STABILITY REQUIREMENTS FOR ALL INSPECTED VESSELS > SUBPART F—Determination of Lightweight Displacement and Centers of Gravity (§170.174 to §170.200) > 170.200—Estimated lightweight vertical center of gravity.

170.200—Estimated lightweight vertical center of gravity.

(a) Each tank vessel that does not carry a material listed in either Table 1 of part 153 or Table 4 of part 154 of this chapter may comply with this section in lieu of § 170.175 if it—
(1) Is 150 gross tons or greater;
(2) Is of ordinary proportions and form;
(3) Has a flush weather deck, one or more longitudinal bulkheads, and no independent tanks; and
(4) Is designed not to carry cargo above the freeboard deck.
(b) When doing the calculations required by §§ 170.170 and 172.065, the vertical center of gravity of a tank vessel in the lightweight condition must be assumed to be equal to the following percentage of the molded depth of the vessel measured from the keel amidship:
(1) For a tank ship—70%.
(2) For a tank barge—60%.
(c) As used in this section, molded depth has the same meaning that is provided for the term in § 42.13-15(e) of this chapter.
[CGD 79-023, 48 FR 51010, Nov. 4, 1983, as amended by CGD 85-080, 61 FR 944, Jan. 10, 1996]