46 C.F.R. § 69.171 When the tonnage mark is considered submerged.
Title 46 - Shipping
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.
Title 46: Shipping
PART 69—MEASUREMENT OF VESSELS
Subpart D—Dual Measurement System
§ 69.171 When the tonnage mark is considered submerged.
