---
kind: "unit"
title: "46"
title_heading: "Shipping"
key: "chI/subchJ/part113"
level: "part"
label: "Part 113"
heading: "Communication and Alarm Systems and Equipment"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/46/chI-subchJ-part113"
sections_count: 55
---

# Part 113 — Communication and Alarm Systems and Equipment

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

## Contents

- [Subpart 113.05 — General Provisions](/cfr/46/chI-subchJ-part113-subpart113.05.md)
- [Subpart 113.10 — Fire and Smoke Detecting and Alarm Systems](/cfr/46/chI-subchJ-part113-subpart113.10.md)
- [Subpart 113.20 — Automatic Sprinkler Systems](/cfr/46/chI-subchJ-part113-subpart113.20.md)
- [Subpart 113.25 — General Emergency Alarm Systems](/cfr/46/chI-subchJ-part113-subpart113.25.md)
- [Subpart 113.27 — Engineers' Assistance-Needed Alarm](/cfr/46/chI-subchJ-part113-subpart113.27.md)
- [Subpart 113.30 — Internal Communications](/cfr/46/chI-subchJ-part113-subpart113.30.md)
- [Subpart 113.35 — Engine Order Telegraph Systems](/cfr/46/chI-subchJ-part113-subpart113.35.md)
- [Subpart 113.37 — Shaft Speed and Thrust Indicators](/cfr/46/chI-subchJ-part113-subpart113.37.md)
- [Subpart 113.40 — Rudder Angle Indicator Systems](/cfr/46/chI-subchJ-part113-subpart113.40.md)
- [Subpart 113.43 — Steering Failure Alarm Systems](/cfr/46/chI-subchJ-part113-subpart113.43.md)
- [Subpart 113.45 — Refrigerated Spaces Alarm Systems](/cfr/46/chI-subchJ-part113-subpart113.45.md)
- [Subpart 113.50 — Public Address Systems](/cfr/46/chI-subchJ-part113-subpart113.50.md)
- [Subpart 113.65 — Whistle Operators](/cfr/46/chI-subchJ-part113-subpart113.65.md)