---
kind: "section"
citation: "46 C.F.R. § 62.35-50"
title: "46"
number: "62.35-50"
heading: "Tabulated monitoring and safety control requirements for specific systems."
url: "https://uscodex.org/cfr/46/62.35-50"
---

# §62.35-50. Tabulated monitoring and safety control requirements for specific systems.


The minimum instrumentation, alarms, and safety controls required for specific types of systems are listed in table 1 to § 62.35-50. The ABS Marine Vessel Rules (incorporated by reference; see [§ 62.05-2](/cfr/46/62.05-2.md)) required for engineering systems are also listed in table 1 to § 62.35-50.

- (a) Safety limit controls must be provided in navigating bridge primary propulsion control systems. See [§ 62.35-5(c)](/cfr/46/62.35-5.md?p=c).
- (b) Safety trip controls and alarms must be provided for all main boilers, regardless of mode of operation. See [§ 62.35-20(a)](/cfr/46/62.35-20.md?p=a).
- (c) Loss of forced lubrication safety trip controls must be provided for main propulsion turbines and main propulsion diesel engines.
- (d) Override of overspeed and loss of forced lubrication pressure safety trip controls must not be provided for main propulsion or generator steam or gas turbines, or diesel engines. See [§ 62.35-5(e)(2)](/cfr/46/62.35-5.md?p=e-2).
- (e) Transfer interlocks must be provided for main propulsion systems capable of remote and local control.
- (f) Semiconductor controlled rectifiers must have current limit controls.
- (g) Interlocks must be provided to prevent the starting of engines or turbines while the jacking or turning gear, if installed, is engaged. See [§ 62.25-5(a)](/cfr/46/62.25-5.md?p=a).
- (h) Main and remote-control stations, including the navigational bridge, must provide visual and audible alarms in the event of a fire in the main machinery space.
- (i) Minimally attended and periodically unattended machinery plants must be provided with a personnel alarm that annunciates on the bridge if not acknowledged by the watch engineer. See [§ 62.50-20(b)(1)](/cfr/46/62.50-20.md?p=b-1).
- (j) All automatic controls and alarms must be failsafe to the least critical consequence for the particular system. See [§ 62.30-1](/cfr/46/62.30-1.md).
- (k) The operating or tripped status of vital auxiliary boilers must be indicated at the ECC. See [part 63](/cfr/46/part63.md) of this subchapter.

## Notes

### Amendments

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988, as amended by USCG-2000-7790, 65 FR 58461, Sept. 29, 2000; USCG-2003-16630, 73 FR 65190, Oct. 31, 2008]

### Source

Source: CGD 81-030, 53 FR 17838, May 18, 1988, as amended by USCG-2020-0634, 89 FR 50192, June 12, 2024, unless otherwise noted.

### Authority

Authority: 46 U.S.C. 3306, 3703, 8105; sec. 617, Pub. L. 111-281, 124 Stat. 2905; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGD 81-030, 53 FR 17838, May 18, 1988, unless otherwise noted.

### Amendments

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988, as amended by USCG-2000-7790, 65 FR 58461, Sept. 29, 2000; USCG-2003-16630, 73 FR 65190, Oct. 31, 2008]