View all text of Subpart D [§ 69.151 - § 69.183]
§ 69.171 - When the tonnage mark is considered submerged.
For the purpose of this subpart, a tonnage mark is considered submerged when—
(a) In salt or brackish water, the upper edge of the tonnage mark is submerged; and
(b) In fresh or tropical water, the upper edge of the line for fresh and tropical waters is submerged.