Chapter II-1 : Construction – Structure, subdivision and stability, machinery and electrical installations

Part – E Additional requirements for periodically unattended machinery spaces

UMS requirements: ums regulation

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SOLAS chapter 2-1 part E which is  called – Essential requirements for any unattended machinery space

(UMS)

regulation 46 to 53,describes the UMS regulations

Regulations 46 General

Regulations 47 Fire Precaution

Regulations 48 Protection against Flooding

Regulations 49 Control of Propulsion Machinery from Navigation Bridge

Regulations 50 communication

Regulations 51 alarm system

Regulations 52 safety system

Regulations 53 Special requirements for machinery, boiler and electrical installations

Regulation 46 General

1. The arrangements provided to ensure that the safety of the ship in all sailing conditions, including manoeuvering, is equivalent to manned machinery spaces.
2. Machineries should be maintained to ensure that the equipment is functioning in a reliable manner. Inspection and routine tests are Carried out to ensure continuous reliable operation of machineries.
3. Every ship shall be provided with documentary evidence, proving its fitness to operate with periodically unattended machinery spaces.

Regulation 47 Fire Precaution

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

a.  In the boiler air supply casing and uptake.

b. In scavenge space of propulsion machinery.

2. In engines of power 2250 Kw and above or cylinders having bore more than 300mm should be provided with oil mist detector for crankcase or bearing temperature monitor or either of two.

Regulation 48: Protection against Flooding

1. Bilge well in UMS ship such that the accumulation of liquid is detected at normal angle of heel and trim and should also have enough space to accommodate the drainage of liquid during unattended period.
2. Where the bilge pumps are capable of being started automatically, means shall be provided to indicate when the influx of liquid is greater than the pump capacity or
3. when the pump is operating more frequently than would normally be expected.

Where automatically controlled bilge pumps are provided, special attention shall be given to oil pollution prevention requirements.

Regulation 49: Control of Propulsion Machinery from Navigation Bridge

1. The propulsion machinery should be able to be controlled from bridge under all sailing conditions. The bridge should be able to control the speed, direction of thrust, and should be able to change the pitch in case of controllable pitch propeller.
2. Emergency stop should be provided on navigating bridge, independent of bridge control system.
3. Indicators shall be fitted on the navigation bridge for:
   1. propeller speed and direction of rotation in the case of fixed pitch propellers; or
   1. propeller speed and pitch position in the case of controllable pitch propellers.
4. Propulsion machinery orders from the navigation bridge shall be indicated in the main machinery control room or at the propulsion machinery control position as appropriate.
5. The remote operation of the propulsion should be possible from one location at a time; at such connection interconnected control position are permitted.
6. The number of consecutive automatic attempt which fails to start the propulsion machinery shall be limited to safeguard sufficient starting air pressure.
7. It shall be possible for all machinery essential for the safe operation of the ship to be controlled from a local position, even in the case of failure in any part of the automatic or remote-control systems.
8. The design of the remote automatic control system shall be such that in case of its failure an alarm shall be given.

Regulation 50 Communication

A reliable means of vocal communication shall be provided between the main machinery control room or the propulsion machinery control position as appropriate, the navigation bridge and the engineer officers’ accommodation.

Regulation 51 Alarm System

1. An alarm system shall be provided indicating any fault requiring attention and shall:
   • be capable of sounding an audible alarm in the main machinery control room or at the propulsion machinery control position, and indicate visually
   • the alarm system shall have a connection to the engineers’ public rooms and to each of the engineers’ cabins
   • alarm system shall give an audible and visual alarm on the navigation bridge for any situation which requires action by or attention of the officer on watch.
   • It Shall activate the engineers’ alarm if an alarm function has not received attention locally within a limited time.
2. The alarm system shall be continuously powered and shall have an automatic change-over to a stand-by power supply in case of loss of normal power supply.
3. Failure of the normal power supply of the alarm system shall be indicated by an alarm.
4. The alarm system shall be able to indicate more than one fault at the same time and the acceptance of any alarm shall not inhibit another alarm.

Regulation 52 Safety systems

A safety system shall be provided to ensure that serious malfunction in propulsion machinery or boiler operations, which presents an immediate danger, shall initiate the automatic shutdown

Regulation 53 Special requirements for machinery, boiler and electrical installations

1. The main source of electrical power shall be such that:
   • In the case of loss of the generator in operation, a stand-by generator of sufficient capacity will automatically start to allow propulsion and steering and to ensure the safety of the ship.
   • automatic restarting of the essential auxiliary machineries need to be provided.
   • If the electrical power is normally supplied by more than one generator simultaneously in parallel operation, in the event of loss of one generator power, the other ones continue operation without overload to allow propulsion and steering, and to ensure the safety of the ship.
2. Where stand-by machines are required for other auxiliary machinery essential for propulsion, automatic change-over devices shall be provided.
3. Automatic control and alarm system
   • The control system shall be such that the services needed for the operation of the main propulsion machinery and its auxiliaries will automatically start.
   • An alarm shall be given on the automatic change-over.
   • A centralized control position shall be arranged with the necessary alarm panels and instrumentation indicating any alarm.
4. Where internal combustion engines are used for main propulsion a system shall be given to keep starting air pressure at the required level