Technical and Operational Guidance Notes


You may download the DP Guidance TECHOP documents at no charge:

    Overview of MTS Fault Ride-Through - slides (October 2014)
  • TECHOP - Control Power Supplies and Auto Changeovers PDF
    This TECHOP is intended to highlight the vulnerabilities that are introduced into DP redundancy concepts by cross connections in control power supplies, including dual supplies and auto changeovers. Possible methods of eliminating or reducing the associated risks are suggested. (Sept 2016)
  • TECHOP A Method For Proving the Fault Ride-Through Capability of DP Vessels with HV Power PDF
    The focus of this TECHOP is to address the significance of fault ride through capability. Fault ride through capability is a significant aspect of proving the fault tolerance of a DP system power plant. Its significance is further increased when the principles of independence and segregation in power plants are not adhered to as the lack of fault ride through capability can lead to a loss of position. (May 2015)
  • TECHOP Annual DP Trials and Gap Analysis PDF
    This TECHOP describes how to create an Annual DP Trials program that complies with the requirements of IMCA M190 & M191 using information obtained from the vessel’s DP Failure Modes and Effects Analysis and associated proving trials program. (September 2014)
  • TECHOP Annual DP Trials GAP Analysis Spreadsheet Excel
    TECHOP Annual Trials GAP Analysis Spreadsheet (September 2014)
  • TECHOP Blackout Recovery PDF
    This TECHOP describes the need for automatic blackout recovery on DP vessels, Design objectives, Desirable features, Undesirable features, Testing automatic blackout recovery and Preparation of specifications for BOR systems on DP vessels. (September 2012)
  • TECHOP Conducting Effective DP Incident Investigations. PDF
    This TECHOP provides general guidance in conducting effective and comprehensive DP Incident Investigations. (Sept 2015)
  • TECHOP Continuous Trials for DP MODUs PDF
    The discussion includes an explanation of how the operational concepts of Critical Activity Mode (CAM) and Task Appropriate Mode (TAM) can influence the development of an annual trials program for MODUs based on IMCA M191,which allows the trials program to be spread over a year. (September 2014)
  • TECHOP Cross Connections PDF
    This TECHOP addresses cross connections between redundant groups in the DP system. Evidence from DP incident data confirms that cross connections in all parts of the DP system continue to be a very significant factor in DP incidents and are often the reason that failure effects exceed anticipated consequences and sometimes the worst case failure design intent. (May 2015)
  • TECHOP Defining Critical Operations Requiring Selection of Critical Activity Mode PDF
    Dialogue between regulators and industry surfaced the need to better identify the criticality and consequences of loss of position for industrial activities and the CAM or TAM configuration they are to be performed in. (January 2014)
  • TECHOP DGNSS Position Reference Sensors PDF
    This TECHOP addresses issues associated with DGNSS from the perspective of Operations, Design and People. (September 2014)
  • TECHOP DP Operations Manual PDF
    This TECHOP addresses the need for and importance of providing effective guidance along with clear and unambiguous instructions on managing DP Operations to Vessel Operational Teams by way of comprehensive DP Operations Manuals. (February 2014)
  • TECHOP DP Operations Manual GAP Analysis Spreadsheet Rev A Excel
    DP Operations Manuals Gap Analysis, Excel file. (February 2014)
  • TECHOP Evaluation of Protection Systems PDF
    This TECHOP discusses the use of protective functions in fault tolerant DP systems, the importance of separation between control, monitoring and protection and classification of protective functions. (September 2012)
  • TECHOP External Interfaces PDF
    This TECHOP discusses ‘external interfaces’ that may be interfaced with DP control systems in certain industrial missions (for example draught sensors, line tensions, pipelay tensions). It also discusses interfaces that may not be an input into the DP control system but could affect thrusters and generators and thereby position keeping integrity (for example ESD systems, F&G systems, ventilation systems, etc.) (September 2014)
  • TECHOP FMEA Gap Analysis PDF
    This TECHOP addresses the wide variation in the scope and quality of DP FMEAs for DP vessels and an objective evaluation tool. (December 2013)
  • TECHOP FMEA GAP Analysis Spreadsheet Excel
    FMEA Gap Analysis, Excel file (December 2013)
  • TECHOP FMEA Proving Trials PDF
    This TECHOP addresses DP FMEA proving trials and important tests which should be carried out to validate certain types of DP Class 2 and DP Class 3 redundancy concept. 2.1.2 This revision includes a DP FMEA proving trials gap analysis template that can be used to gauge the scope of a DP FMEA proving trials program in relation to the class of vessel (DP Class 2 or 3) and the power plant configuration (bus ties open or bus ties closed). (October 2014)
  • TECHOP FMEA Proving Trials GAP Analysis Spreadsheet Excel
    FMEA Proving Trials Gap Analysis, Excel file (October 2014)
  • TECHOP Guidance PDF
    Overview of the TECHOP document design (September 2012)
  • TECHOP High Level Philosophy PDF
    This TECHOP impacts MTS DP Operations Guidance Document Part 2 Appendix 1, it incorporates high level philosophy statements about : Identifying DP as a Safety Critical Element; Additional information to be incorporated in Operations Manual; Establishing a Vessel Specific Drive off to Drift off strategy ;Reinstatement of equipment post failure (September 2012)
  • TECHOP Power Plant Common Cause Failures PDF
    This TECHOP provides general discussion on a range of common cause failure modes affecting DP systems that can often be overlooked in poor quality DP FMEAs. More detailed discussion is limited to a small group of failure modes related to generator fuel and excitation control faults and the severe voltage dips associated with short circuit faults. (September 2012)
  • TECHOP Software Testing PDF
    This TECHOP on software testing recognizes that testing is only one part of the verification process and that testing of software cannot be completely disassociated from testing the hardware that software controls, thus the entire system must be the testing target. There are opportunities to test software in isolation before hardware is available and in a manner that it not easily replicated once the target system is commissioned and operational. This section includes a discussion of the general principles of testing before focusing on the practice of software testing in particular. (September 2014)

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