---
kind: "unit"
title: "49"
title_heading: "Transportation"
key: "subtB/chVIII/part850"
level: "part"
label: "Part 850"
heading: "Coast Guard—national Transportation Safety Board Marine Casualty Investigations"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/49/subtB-chVIII-part850"
sections_count: 9
---

# Part 850 — Coast Guard—national Transportation Safety Board Marine Casualty Investigations

Title 49 C.F.R. — Transportation › Subtitle B — Other Regulations Relating to Transportation › Chapter VIII — National Transportation Safety Board

## Sections

- [§850.1. Purpose.](/cfr/49/850.1.md)
- [§850.3. Relationship to Coast Guard marine investigation regulations and procedures.](/cfr/49/850.3.md)
- [§850.5. Definitions.](/cfr/49/850.5.md)
- [§850.10. Preliminary investigation by the Coast Guard.](/cfr/49/850.10.md)
- [§850.15. Marine casualty investigation by the Board.](/cfr/49/850.15.md)
- [§850.20. Cause or probable cause determinations from Board investigation.](/cfr/49/850.20.md)
- [§850.25. Coast Guard marine casualty investigation for the Board.](/cfr/49/850.25.md)
- [§850.30. Procedures for Coast Guard investigation.](/cfr/49/850.30.md)
- [§850.35. Records of the Coast Guard and the Board.](/cfr/49/850.35.md)