---
kind: "section"
citation: "33 C.F.R. § 89.1"
title: "33"
number: "89.1"
heading: "Definitions."
url: "https://uscodex.org/cfr/33/89.1"
---

# §89.1. Definitions.


As used in this subpart:

Inland Rules refers to the Inland Navigation Rules contained in the Inland Navigational Rules Act of 1980 (Pub. L. 96-591) and the technical annexes established under that act.

A vessel of special construction or purpose means a vessel designed or modified to perform a special function and whose arrangement is thereby made relatively inflexible.

Interference with the special function of the vessel occurs when installation or use of lights, shapes, or sound-signaling appliances under the Inland Rules prevents or significantly hinders the operation in which the vessel is usually engaged.


## Notes

### Amendments

[CGD 80-157, 47 FR 13801, Apr. 1, 1982, as amended by CGD 83-028, 49 FR 33876, Aug. 27, 1984]

### Authority

Authority: 33 U.S.C. 2071; 49 CFR 1.46(n)(14).

### Source

Source: CGD 80-157, 47 FR 13801, Apr. 1, 1982, unless otherwise noted.

### Amendments

[CGD 80-157, 47 FR 13801, Apr. 1, 1982, as amended by CGD 83-028, 49 FR 33876, Aug. 27, 1984]