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IMCA Test > IMCA M 190 > Flashcards

IMCA M 190 Flashcards

1
Q

What does IMCA M 190 provide?

A

A framework enabling the development and conduct of an annual Dynamic Positioning (DP) trials program as a contiguous block of trials with an independent IMCA accredited DP practitioner in attendance onboard.

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2
Q

What is The primary objective of the DP Annual Trials program

A

Prove the attributes of performance, protection, and detection upon which the DP redundancy concept relies for its single fault tolerance and post failure DP capability

Verify that the DP system is fully functional, well maintained and that the failure modes and effects analysis (FMEA) remains valid

To give failure response awareness, training and experience to Key DP personnel onboard

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3
Q

What is The secondary objective of the DP Annual Trials program

A

to provide a common standard approach for the auditing and accepting of DP vessels by client

to make the DP testing and acceptance process more efficient and thus save the industry time and unnecessary costs.

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4
Q

Is it possible to concut DP tests without a third party?

A

No. Except all criteria from digital trials be met from SECTION 8

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5
Q

Can shipboard personnel conduct tests and send evidences (through photographs, screen shots, log printouts, etc) to personnel asshore for evaluation and approval?

A

No

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6
Q

What is the DP FMEA used for?

A

to validate the analysis and the redundancy concept of the DP vessel

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7
Q

What does the the FMEA proving trials ALSO validate and identify?

A

the performance, protection, and detection attributes on which the redundancy concept relies for its single fault tolerance

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8
Q

What are the key elements a redundant fault tolerant system ?

A

Performance, Protection, and Detection

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9
Q

What does the programme of tests have to satisfy?

A

the annual survey requirements of Guidelines for vessels and units with dynamic positioning (IMO MSC/Circ. 1580/645 (as applicable)).

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10
Q

What are DP annual trials?

A

A series of tests to verify the integrity of the DP system, conducted annually, to prove the attributes of performance, protection, and detection (refer to M190 Section 4.6.5) upon which the DP redundancy concept relies for its single fault tolerance and post failure DP capability.

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11
Q

What are cumulative tests?

A

A series of tests to verify the integrity of the DP system, conducted over a defined period as part of a Class Approved Data/Digital solution (refer to section 8), to prove the attributes of performance, protection, and detection upon which the DP redundancy concept relies for its single fault tolerance and post failure DP capability

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12
Q

What are rolling tests?

A

Tests on specified components or systems that have been identified as not being required annually but should be completed within a five-year period.

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13
Q

What is necessary to be an independent witness?

A

A sufficiently qualified and experienced individual removed from the day-to-day operational control of the vessel. . The independent witness should be accredited according to the IMCA DP Practitioner Accreditation Scheme

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14
Q

What is Trials Co-ordinator?

A

An individual responsible for the co-ordination of the DP Annual Trials programme. Preferably the Company DP Authority or their delegate

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15
Q

AS per IMCA 190, which IMO circulars are considered for DP trials?

A

IMCA M 190 consideres that IMO 1580is applicable for all vessels regarding DP testing

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16
Q

Can shipowner carry out the annual trials by themselves? without a third party?

A

No. On the latest IMCA M 190 update it is mandatory the use a thirdy party to oconduct DP trials

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17
Q

What is the alternative option for annual trials?

A

DP Annual Trials “Cumulatively” throughout the year using a class approved, data driven verification tool allow review and categorisation of test results by:

  • third party verifiers ashore;
  • automated ‘algorithmic’ verification
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18
Q

What is the importance of code of practice for the vessel operators?

A

assisting in the development, conduct and management of a suitable DP Annual Trials programme

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19
Q

What should the DP Annual Trials programme demonstrate?

A
  • the vessel’s ability to maintain position following identified single failures;
  • demonstrate the DP system is fully functional and well maintained;
  • contribute to the effective management of the DP FMEA;
  • ensure the best use of the time available for DP system tests
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20
Q

As per IMO CIRC 1580, how often should annual survrvey be carried out?

A

Within +/- 3 months before of after each anniversary date of the DPVAD or if not available, the anniversary date of the class initial survey should be used to determine the date of the annual survey

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21
Q

What should include on initial survey?

A

a complete survey of the DP system and FMEA proving trials for DP Classes 2 and 3 to ensure full compliance with the applicable parts of the guidelines

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22
Q

When should be carried out periodical testing ?

A

at intervals not exceeding five years to ensure full compliance with the applicable parts of the guidelines

23
Q

AS per IMO CIRC 1580 what are the required tests?

A

initial survey
periodical testing at intervals not exceeding five years’ , and
annual survey

24
Q

Whay should DP vessels be subjected to annual testing of the DP system?

A

to demonstrate that the vessel remains fit for purpose for DP operations.

25
Q

What is the base of of DP Annual Trials programme ?

A

DP FMEA proving trials

26
Q

What does annula testing of DP system demonstrate?

A

demonstrate that the vessel remains fit for purpose for DP operations, may be carried out during DP Annual Trials, which are conducted either in one dedicated period or cumulatively over a defined period

27
Q

What is the focus of DP FMEA proving trials ?

A

the WCFDI is not exceeded and that failure effects are as expected

28
Q

As per IMCA 190 describe when There SHALL be and when There SHOULD be an accredited IMCA DP Practitioner?

A
  • Independent witness:SHOULD be
  • individual responsible for developing the DP Annual Trials Programme: SHALL be
29
Q

What is necessary necessary to develop an effective DP Annual Trials programme ?

A
  • the up to date DP FMEA;
  • the most recent DP FMEA proving trials report;
  • details of any hardware and/or software changes since the DP FMEA was last revised;
  • the relevant classification society rules applicable for the year of build or entry into class;
  • DP operations manual;
  • this Code of Practice.
30
Q

What should be included on FMEA Proving Trials as per IMO Circ.. 1580?

A

a complete test of all systems and components and the ability to keep position after single failures associated with the assigned equipment class”.

31
Q

Describe 5 main “points” the DP Annual Trials programme SHALL meet?

A
  • demonstrate that the DP system is fully functional, well maintained and the redundancy concept remains intact;
  • verify the level of integral redundancy established by the DP FMEA;
  • verify the effectiveness of essential protective functions and alarms;
  • meet the testing and survey requirements of IMO Guidelines for vessels with DP systems;
  • meet the requirements of the classification society for annual and periodical renewal surveys (as appropriate);
32
Q

What are the important elements in any fault tolerant system based on redundancy

A
  • performance;
  • protection;
  • detection
33
Q

Whar is the definition of performance?

A

a number of criteria such as full load capability, load acceptance and rejection, endurance, repeatability, resolution and accuracy.

34
Q

Whay is necessary protective devices?

A

To prevent fault propagation beyond the WCFDI

35
Q

Why vessels with arrangements in place for common operation need barries?

A

to prevent fault propagation via cross connection when operating in a critical activity (DP2 or DP3) mode

36
Q

Why is the protective function is used?

A

prevent control systems from acting on erroneous information or data that is obviously out of range. It is also used to identify equipment that is not responding correctly and shut it down before it can affect the operation of the DP system

37
Q

Regarding detection, what is the importance of alrms?

A

Alarms are used to indicate equipment failure. It may be used to indicate the system is no longer fully fault tolerant or that action is required to prevent failure effects from escalating.
Alarms have an important role to play in monitoring the readiness of standby redundancy.

38
Q

What should be identified on FMEA in general words?

A

WCFDI
Operating configurations
The vessel’s DP theoretical capability plots in the fully operational and post WCF conditions
The redundant groups
All protective functions upon which the redundancy concept depends
All alarms required to indicate potential hidden failure or loss of redundancy
All equipment and systems which may suffer a significant deterioration in capacity/performance
All equipment and systems which may suffer a significant deterioration in accuracy
The failsafe condition of Thrusters

39
Q

Report 3 examples “ Performance” DP trials

A

Generator full power tests:
Thruster full power tests
Group redundancy tests

40
Q

What does the generator full power tests have to prove?

A

the full load capability and load acceptance of the generators.

41
Q

How should the generator full power tests be done?

A

Generators should be loaded to 100% for 15 minutes or until temperatures stabilise, whichever is shorter. Tests can be carried out individually or in groups using thruster bias, individual generator controls or whichever means is most suitable

42
Q

What does the Thruster full power tests have to prove?

A

the full power capability of the thrusters.

43
Q

How should the Thruster full power tests be carried out?

A

Thrusters should be loaded to 100% for 15 minutes or until temperatures stabilise, whichever is the shorter, in pairs or groups. thruster will be tested to the scaled factor, and not to the thruster’s maximum capacity

44
Q

What should the Group redundancy tests prove?

A

prove the vessel can maintain position and heading with the remaining redundant groups in line with the vessels WCFDI.

45
Q

Report 5 examples of protection DO tests

A
  • load dependent starting of standby generators
  • load shedding
  • load shedding
  • thruster loop failures
  • thruster emergency stops;
46
Q

Can the Protection DP tests be part of the planned maintenance maintenance ? If Yes, report some examples.

A

Yes.
Testing of over current protection and
engine safety systems

47
Q

What does the detection tests prove?

A

the effectiveness of alarm and indications intended to reveal potential hidden failures, or that some part of the redundancy concept is not functioning correctly and may require operator intervention.

48
Q

Report examples of Detection DP Tests

A
  • thruster speed and azimuth command/feedback prediction errors;
  • alarms for start of a standby pump or other service;
  • control loop failure alarms (input errors);
  • alarms to indicate that a UPS is on battery power;
  • alarms related to pressure/temperature in cooling water systems (FW/SW);
49
Q

What DP tests have to be carried out on DP?

A

Those to prove performance of components of DP system or to demonstrate the ability of the vessel to maintain position following identified single failures

50
Q

What tests could be done out of DP?

A
  • battery endurance – for UPS units and 24Vdc battery systems.
  • generator full power tests;
  • thruster full power endurance tests
  • pump automatic changeovers
  • Communications
  • DP alert
51
Q

What are the conditions to use planned maintenance or Survey Records in Lieu of Specific Annual Test Results?

A

provided the nature of testing carried out for planned maintenance or survey also fulfils all DP annual testing requirements or can be supplemented by additional tests.

52
Q

What is the criteria toi include Planned Maintenance or Survey Records in Lieu of Specific Annual Test Results?

A

Tests of this nature, that are included in the DP Annual Trials programme, are to be completed within three months before the anniversary date of the initial complete test of all systems and components

53
Q
A
54
Q
A

IMCA Test (4 decks)

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