11.4 Alarm system
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - HSC 2000 Code - International Code of Safety for High-Speed Craft, 2000 – Resolution MSC.97(73) - Chapter 11 - Remote control, alarm and safety systems - 11.4 Alarm system

11.4 Alarm system

  11.4.1 Alarm systems shall be provided which announce at the craft's control position, by visual and audible means, malfunctions or unsafe conditions. Alarms shall be maintained until they are accepted and the visual indications of individual alarms shall remain until the fault has been corrected, when the alarm shall automatically reset to the normal operating condition. If an alarm has been accepted and a second fault occurs before the first is rectified, the audible and visual alarms shall operate again. Alarm systems shall incorporate a test facility.

  11.4.1.1 Emergency alarms giving indication of conditions requiring immediate action shall be distinctive and in full view of crew members in the operating compartment, and shall be provided for the following:

  • .1 activation of a fire-detection system;

  • .2 total loss of normal electrical supply;

  • .3 overspeed of main engines; and

  • .4 thermal runaway of any permanently installed nickel-cadmium battery.

  11.4.1.2 Alarms with a visual display distinct from that of alarms referred to in 11.4.1.1 shall indicate conditions requiring action to prevent degradation to an unsafe condition. These shall be provided for at least the following:

  • .1 exceeding the limiting value of any craft, machinery or system parameter other than engine overspeed;

  • .2 failure of normal power supply to powered directional or trim control devices;

  • .3 operation of any automatic bilge pump;

  • .4 detection of bilge water in each watertight compartment below the design waterline;

  • .5 failure of compass system;

  • .6 low level of a fuel tank contents;

  • .7 fuel oil tank overflow;

  • .8 extinction of side, masthead or stern navigation lights;

  • .9 low level of contents of any fluid reservoir the contents of which are essential for normal craft operation;

  • .10 failure of any connected electrical power source;

  • .11 failure of any ventilation fan installed for ventilating spaces in which inflammable vapours may accumulate; and

  • .12 diesel engine fuel line failure as required by 9.4.2.

  11.4.1.3 All warnings required by 11.4.1.1 and 11.4.1.2 shall be provided at all stations at which control functions may be exercised.

  11.4.2 The alarm system shall meet appropriate constructional and operational requirements for required alarms.footnote

  11.4.3 Equipment monitoring the passenger, cargo and machinery spaces for fire and flooding shall, so far as is practicable, form an integrated sub-centre incorporating monitoring and activation control for all emergency situations. This sub-centre may require feedback instrumentation to indicate that actions initiated have been fully implemented.

Parent topic: Chapter 11 - Remote control, alarm and safety systems
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