---
kind: "section"
citation: "46 C.F.R. § 143.230"
title: "46"
number: "143.230"
heading: "Alarms and monitoring."
url: "https://uscodex.org/cfr/46/143.230"
---

# §143.230. Alarms and monitoring.

- (a) Each towing vessel must have a reliable means to provide notification when an emergency condition exists or an essential system develops problems that require attention. The following alarms must be provided:
  - (1) Main engine low lubricating oil pressure;
  - (2) Main engine high cooling water temperature;
  - (3) Auxiliary generator engine low lubricating oil pressure;
  - (4) Auxiliary generator engine high cooling water temperature;
  - (5) High bilge levels;
  - (6) Low hydraulic steering fluid levels, if applicable; and
  - (7) **Low fuel level, if fitted with a day tank.**
- (b) **Alarms must—**
  - (1) **Be visible and audible at each operating station.** The alarm located at the operating station may be a summary alarm; if the alarm at the operating station is a summary alarm, the specific alarm condition must be indicated at the machinery or bilge location;
  - (2) Have a means to test actuation at each operating station or have a continuous self-monitoring alarm system which actuates if an alarm point fails or becomes disabled;
  - (3) Continue until they are acknowledged; and
  - (4) **Not interfere with night vision at the operating station.**
- (c) The following systems must be equipped with gauges at the machinery location:
  - (1) Main engine lubricating oil pressure and main engine RPM;
  - (2) Main engine cooling water temperature;
  - (3) Auxiliary generator engine lubricating oil pressure and auxiliary generator engine RPM;
  - (4) Auxiliary generator engine cooling water temperature; and
  - (5) **Hydraulic steering fluid pressure, if the vessel is equipped with hydraulic steering systems.**

## Notes

### Authority

Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 CFR 1.05; DHS Delegation No. 0170.1.

### Source

Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless otherwise noted.