46 CFR § 58.01-35 - Main propulsion auxiliary machinery.

---
identifier: "/us/cfr/t46/s58.01-35"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 58.01-35 - Main propulsion auxiliary machinery."
title_number: 46
title_name: "Shipping"
section_number: "58.01-35"
section_name: "Main propulsion auxiliary machinery."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "F"
subchapter_name: "MARINE ENGINEERING"
part_number: "58"
part_name: "MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4."
regulatory_source: "CGFR 68-82, 33 FR 18878, Dec. 18, 1968, unless otherwise noted."
cfr_part: "58"
---


# 58.01-35 Main propulsion auxiliary machinery.

Auxiliary machinery vital to the main propulsion system must be provided in duplicate unless the system served is provided in independent duplicate, or otherwise provides continued or restored propulsion capability in the event of a failure or malfunction of any single auxiliary component.

Partial reduction of normal propulsion capability as a result of malfunction or failure is acceptable if the reduced capability is not below that necessary for the vessel to run ahead at 7 knots or half speed, whichever is less, and is adequate to maintain control of the ship.

[CGD 81-030, 53 FR 17837, May 18, 1988, as amended by USCG-2020-0634, 89 FR 50172, June 12, 2024]