IMU-CET - PCM Combined Sample Questions

The present publication was released to provide recommendations relating to the HMI, standing for the human-machine interface in terms of applying the ergonomic design, since the effectiveness of the design of the display will eventually improve the overall user-friendliness of the whole system and associated equipment. The possibility of the human error may be significantly reduced, and the situational awareness, in turn, will be enhanced.

First of all, the role requirements and the operational philosophy shall be clearly defined in order to reach better and deep understanding of the control functions of the system. In fact, it is this understanding on which the whole content of this volume is based; it is highly recommended that the operators are duly supported with the proper design process to make sure that the operation is safe and smooth.

The ship owners are therefore encouraged to work closely with all parties involves including but not limited to the designers of the systems, engineers of the class societies, as well as the ship yards for creating the HMI that would provide the desired functions, and the development of the shipboard cargo control room shall have the aforementioned philosophy implemented as necessary.

The authors of the present publication released by the world respected SIGTTO organization recommend that the alarm management philosophies are implemented for the cargo alarm systems of the modern gas carrying vessels. Nowadays, the subject systems can actually be set up with the endless number of alarms, and the huge number of alarms can be generated nearly simultaneously, should any abnormal condition take place.

In the industry, this is usually called alarm flooding. This condition can eventually disable the entire alarm system, reducing the effectiveness of it as the information source, and eventually leading to the incident. There are some other alarms with the potential to deduct from the efficiency of the shipboard alarm system, for example the stale and chattering alarms. It is critically important for the operator to be able to rapidly check the cargo system status together with all safety elements.

Also, the information available to the operator of the system, shall be duly grouped for easier reference, enabling him or her quickly react. The alarm management shall be treated as the systematic process covering all common issues and addressing all important aspects of the system design and maintenance, as well as the periodic audit and training of the personnel involved.

This official SIGTTO publication was prepared and published for those willing to get some professional advice and guidance on the design of the CCS, or Cargo Control Rooms, of the vessels carrying liquefied gases. It shall be noted that the recommendations contained in the pages of this volume shall apply only to the new ships, and not to the existing facilities.

However, the owners of the vessels in service might treat this book as providing guidance for the future major upgrades of the cargo control rooms on their gas carriers. The main body of the document is arranged in two parts, the first part providing some introduction and defining the scope, plus listing some key publications used when compiling this guidance.

The second part of the book covers the framework for the design process, namely clarification, analysis and definition, conceptual design, detailed design and, finally, operational feedback. Note that there is also a compact glossary of the terminology used throughout the text, for better understanding. Have a look in this concise document if you are interested in the design of the CCR of the modern gas carriers since it will provide you with everything one would need to understand the idea.

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