Page 7 - Instrumentation and Measurement

1.3 Safety

In most cases safety is improved by monitoring and control.

Requirements for unmanned machinery spaces (UMS) are defined by surveying societies.

1. Bridge control of propulsion machinery

The bridge watchkeeper must be able to take emergency control action. Control and
instrumentation must be as simple as possible.

2. Centralised control and instruments are required in machinery space.

Engineers may be called to the machinery space in an emergency and controls must be easily
reached and fully comprehensive.

3. Automatic fire detection system.

Arrangement should be provided on an UMS ship to detect and give alarm in case of fire.

Alarm and detection system must operate very rapidly. Numerous well-sited and quick-
response detectors must be fitted.

4. Fire extinguishing system.

In addition to conventional hand extinguishers a control fire station remote from the machinery
space is essential. The station must give control of emergency pumps, generators, valves,
ventilators, extinguishing media, etc.

5. Alarm system.

A comprehensive machinery alarm system must be provided for control and accommodation
areas.

6. Automatic bilge high-level fluid alarms and pumping units.

Sensing devices in bilges with alarms and hand or automatic pump cut in devices must be
provided.

7. Automatic start emergency generator.

Such a generator is best connected to separate emergency bus bars. The primary function is to
give protection from electrical blackout conditions. Local hand control of essential machinery.
Adequate settling tank storage capacity. Regular testing and maintenance of instrumentation.

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