---
kind: "section"
citation: "46 C.F.R. § 69.171"
title: "46"
number: "69.171"
heading: "When the tonnage mark is considered submerged."
url: "https://uscodex.org/cfr/46/69.171"
---

# §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.**

## Notes

### Authority

Authority: 46 U.S.C. 2301, 14103, 14104; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 87-015b, 54 FR 37657, Sept. 12, 1989, unless otherwise noted.