46 CFR § 69.171 - When the tonnage mark is considered submerged.

---
identifier: "/us/cfr/t46/s69.171"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 69.171 - When the tonnage mark is considered submerged."
title_number: 46
title_name: "Shipping"
section_number: "69.171"
section_name: "When the tonnage mark is considered submerged."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "G"
subchapter_name: "DOCUMENTATION AND MEASUREMENT OF VESSELS"
part_number: "69"
part_name: "MEASUREMENT OF VESSELS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 2301, 14103, 14104; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGD 87-015b, 54 FR 37657, Sept. 12, 1989, unless otherwise noted."
cfr_part: "69"
---


# 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.