46 CFR § 143.590 - Propulsor redundancy on vessels that move tank barges carrying oil or hazardous material in bulk.

---
identifier: "/us/cfr/t46/s143.590"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 143.590 - Propulsor redundancy on vessels that move tank barges carrying oil or hazardous material in bulk."
title_number: 46
title_name: "Shipping"
section_number: "143.590"
section_name: "Propulsor redundancy on vessels that move tank barges carrying oil or hazardous material in bulk."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "M"
subchapter_name: "TOWING VESSELS"
part_number: "143"
part_name: "MACHINERY AND ELECTRICAL SYSTEMS AND EQUIPMENT"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 CFR 1.05; DHS Delegation No. 0170.1."
regulatory_source: "USCG-2006-24412, 81 FR 40101, June 20, 2016, unless otherwise noted."
cfr_part: "143"
---


# 143.590 Propulsor redundancy on vessels that move tank barges carrying oil or hazardous material in bulk.

(a) A towing vessel must be provided with at least two independent propulsors unless the requirements of § 143.595 are met.

(b) There must be independent controls for each propulsor at each operating station.

(c) In the event of a failure of a single propulsor, the remaining propulsor(s) must have sufficient power to maneuver the vessel to a safe location.