---
kind: "section"
citation: "46 C.F.R. § 178.310"
title: "46"
number: "178.310"
heading: "Intact stability requirements—general."
url: "https://uscodex.org/cfr/46/178.310"
---

# §178.310. Intact stability requirements—general.

- (a) Except as provided in [paragraph (c)](#c) of this section, each vessel must, in each condition of loading and operation, comply with the applicable requirements of—
  - (1) [Part 170](/cfr/46/part170.md) of this chapter, except subparts [G](/cfr/46/subpartG.md) and [H](/cfr/46/subpartH.md); and
  - (2) **Part 171 of this chapter, subparts A and B.**
- (b) Sailing vessels must meet the appropriate requirements of [§ 171.055](/cfr/46/171.055.md) or [§ 171.057](/cfr/46/171.057.md) in subchapter S in this chapter while under sail, as well as the requirements of [§ 170.170](/cfr/46/170.170.md) in subchapter S in this chapter while under bare poles (if an auxiliary sailing vessel as defined in [§ 170.055(a)](/cfr/46/170.055.md?p=a) of this chapter) and with storm sails set and trimmed flat (if a sailing vessel as defined in [§ 170.055(n)](/cfr/46/170.055.md?p=n) of this chapter).
- (c) As an alternative to meeting the requirements of paragraphs [(a)](#a) and [(b)](#b) of this section, a vessel may demonstrate compliance with an appropriate standard set forth in either [§ 178.320](/cfr/46/178.320.md) of this part for non-sailing vessels or [§ 178.325](/cfr/46/178.325.md) of this part for monohull sailing vessels if all of the following criteria are satisfied:
  - (1) The length is not more than 19.8 meters (65 feet) in length;
  - (2) The vessel does not carry more than 12 passengers on an international voyage;
  - (3) The vessel either does not have more than one deck above the bulkhead deck or, if without a bulkhead deck, does not have more than one deck above the deck from which freeboard is measured excluding a pilot house; and
  - (4) The vessel's stability has not been questioned by the cognizant Officer in Charge, Marine Inspection (OCMI).
- (d) In lieu of the requirements in [paragraphs (a) through (c)](#a..c) of this section, a vessel may meet another stability standard approved by the Commanding Officer, Marine Safety Center.

## Notes

### Amendments

[USCG-2007-0030, 75 FR 78088, Dec. 14, 2010]

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.3.

### Source

Source: CGD 85-080, 61 FR 966, Jan. 10, 1996, unless otherwise noted.

### Amendments

[USCG-2007-0030, 75 FR 78088, Dec. 14, 2010]