46 CFR § 172.165 - Intact stability calculations.

---
identifier: "/us/cfr/t46/s172.165"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 172.165 - Intact stability calculations."
title_number: 46
title_name: "Shipping"
section_number: "172.165"
section_name: "Intact stability calculations."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "S"
subchapter_name: "SUBDIVISION AND STABILITY"
part_number: "172"
part_name: "SPECIAL RULES PERTAINING TO BULK CARGOES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306, 3703, 5115; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation 00170.1, Revision No. 01.2."
regulatory_source: "CGD 79-023, 48 FR 51040, Nov. 4, 1983, unless otherwise noted."
cfr_part: "172"
---


# 172.165 Intact stability calculations.

(a) Design calculations must show that 2 inches (50mm) of positive metacentric height can be maintained by each tankship when it is being loaded and unloaded.

(b) For the purpose of demonstrating compliance with the requirements of paragraph (a) of this section, the effects of the addition of water ballast may be considered.