---
kind: "unit"
title: "46"
title_heading: "Shipping"
key: "chI/subchU"
level: "subchap"
label: "Subchapter U"
heading: "Oceanographic Research Vessels"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/46/chI-subchU"
sections_count: 346
---

# Subchapter U — Oceanographic Research Vessels

Title 46 C.F.R. — Shipping › Chapter I — Coast Guard, Department of Homeland Security

## Contents

- [Part 188 — General Provisions](/cfr/46/chI-subchU-part188.md)
- [Part 189 — Inspection and Certification](/cfr/46/chI-subchU-part189.md)
- [Part 190 — Construction and Arrangement](/cfr/46/chI-subchU-part190.md)
- [Part 191-192 — Parts 191-192 [reserved]](/cfr/46/chI-subchU-part191-192.md)
- [Part 193 — Fire Protection Equipment](/cfr/46/chI-subchU-part193.md)
- [Part 194 — Handling, Use, and Control of Explosives and Other Hazardous Materials](/cfr/46/chI-subchU-part194.md)
- [Part 195 — Vessel Control and Miscellaneous Systems and Equipment](/cfr/46/chI-subchU-part195.md)
- [Part 196 — Operations](/cfr/46/chI-subchU-part196.md)