---
kind: "section"
citation: "33 C.F.R. § 147.843"
title: "33"
number: "147.843"
heading: "Thunder Horse Semi-Submersible safety zone."
url: "https://uscodex.org/cfr/33/147.843"
---

# §147.843. Thunder Horse Semi-Submersible safety zone.

- (a) **Description.** Thunder Horse Semi-Submersible, Mississippi Canyon 778 (MC 778), located at position 28°11′26″ N, 88°29′44″ W. The area within 500 meters (1640.4 feet) from each point on the structure's outer edge is a safety zone. These coordinates are based upon [NAD 83].
- (b) **Regulation.** No vessel may enter or remain in this safety zone except the following:
  - (1) An attending vessel;
  - (2) A vessel under 100 feet in length overall not engaged in towing; or
  - (3) **A vessel authorized by the Commander, USCG Heartland District.**

## Notes

### Amendments

[CGD08-05-019, 70 FR 43770, July 29, 2005]

### Authority

Authority: 14 U.S.C. 544; 43 U.S.C. 1333; 33 CFR 1.05-1; Department of Homeland Security Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 78-160, 47 FR 9386, Mar. 4, 1982, unless otherwise noted.

### Amendments

[CGD08-05-019, 70 FR 43770, July 29, 2005]