An alarm system on UMS vessels that channels all critical engine room and safety alarms to the navigating bridge when the engine room is unmanned.
Quick facts
Regulation
SOLAS Chapter II
In practice
Bridge alarm management is a shared responsibility between deck and engineering officers. If a critical alarm is not acknowledged within the prescribed time, a general alarm may be automatically triggered. Officers on watch must be trained to distinguish alarm priorities and to take bridge-level emergency actions — such as reducing speed, calling all hands, or altering course — while awaiting the engineer's assessment. Classification surveyors test bridge alarm systems during port state control and class surveys, checking both audibility and the logic of alarm routing, including tests of watchkeeper absence detection for vessels requiring this feature under class notation.
Regulatory detail & full definition
The bridge alarm system on a UMS vessel channels all critical engine room, cargo, and hull alarms to the navigating bridge and to an alarm panel in the duty officer of the watch's cabin, ensuring that the officer can identify and respond to machinery emergencies even when the engine room is unattended. SOLAS Chapter II-1/51 and IACS Unified Requirements M28–M34 specify the categories of alarm that must be bridged, the response time requirements, and the need for audible and visual indication. The system must be designed so that the duty engineer acknowledges each alarm and the bridge officer can confirm that response is under way.
Bridge alarm management is a shared responsibility between deck and engineering officers. If a critical alarm is not acknowledged within the prescribed time, a general alarm may be automatically triggered. Officers on watch must be trained to distinguish alarm priorities and to take bridge-level emergency actions — such as reducing speed, calling all hands, or altering course — while awaiting the engineer's assessment. Classification surveyors test bridge alarm systems during port state control and class surveys, checking both audibility and the logic of alarm routing, including tests of watchkeeper absence detection for vessels requiring this feature under class notation.