Applicable and Guidelines Rules, regulations, requirements, and recommendations for reactivated assets are as varied as the assets themselves. In each case, direct reference should be made to: Class and Flag State requirements Asset Owner / Operator requirements Client / Charterer Requirements (as applicable) Original Equipment Manufacturer (OEM) or vendor recommendations General industry recommended practices (Institute of Electrical and Electronics Engineers [IEEE], International Marine Contractors Association [IMCA], etc.) In no instance should the guidelines provided herein take precedence over applicable Flag State, Class Society, manufacturer, established owner / operator protocols or contractual covenants unless specifically discussed and agreed upon with all responsible parties. Assumptions and Limitations This guidance provides a detailed description of recommended practices for the reactivation of a DP related Guidance for lay-up and maintenance of stacked assets is not provided within this document and no assumptions related to these activities is made herein. It is envisioned that this guidance will be used strictly in conjunction with equipment and system documentation that is explicitly intended to reflect equipment installed on Accordingly, all equipment and system specific documentation should be reviewed and take precedence over any advice or instruction provided within this Guidance. Where specific guidance is not provided, OEMs and vendors should be contacted directly. This guidance references recognized standards – directly or by reference – that, if followed, provide assurance that affected systems and equipment are adequately prepared for reactivation when returning to service. Maintenance of Guidance Reasonable efforts will be made to maintain this guidance in an up-to-date fashion at periodic intervals or if deemed necessary and appropriate to reflect relevant industry developments. Suggested maintenance procedures and equipment, industry guidance, and / or Class and Flag State requirements noted within these guidelines are subject to review and revision by numerous stakeholders at varying times with little or no notice to MTS. It is imperative that the most up-to-date references and documentation be consulted directly to ensure applicability and relevance to the equipment and systems installed on board any given vessel or asset. Updated versions of this guidance will be made available on the MTS DP Committee website for use by interested parties. Updates may include: Information learned from market statistics Class, regulatory and industry standards Information volunteered to the Subcommittee toward improving the guidelines All and suggestions for correction and / or revision are welcome and can be provided directly to the MTS DP Committee, at , referencing DP Asset Reactivation Guidance in the subject line.
IEEE Institute of Electrical and Electronics Engineers SMS Safety Management System IJS Independent Joystick STCW Standards of Training, Certification, and Watchkeeping IMCA International Maritime Contractors Association TAM Task Appropriate Mode IMO International Maritime Organization UPS Uninterruptible Power Supply INS / IMU Inertial Navigation System / Inertial Measurement Unit USCG United States Coast Guard LO Lube Oil VCI Vapor Corrosion Inhibitor LOTO Lock Out / Tag Out VRU Vertical Reference Unit LR Register WCF Worst Case Failure LT Low Temperature WCFDI Case Failure Design Intent LTW / TW Lightweight Taut Wire / Taut Wire WSOG Well Specific Operating Guidelines
specific functions, operating and equipment related to the asset’s industrial mission Protection – Each redundant will also have a range of protective functions designed to prevent fault propagation from one redundant group to the other by way of common points in the design and a range of alarms or other detection methods intended to help reveal hidden failures that could defeat the redundancy concept. Testing should be designed to prove the operation of all protective functions upon which the redundancy concept depends. A review of the FMEA should identify all protective functions which need to operate effectively to isolate faults or prevent cascade failures. Tests should be carried out in all relevant power plant configurations. Tests coming under the heading of protection may include but not be limited to: Load dependent starting of standby generators Alarm starting of stand-by generators in response to alarm on running generator Load shedding – thruster phase back (via DP control system, PMS, and Drives) Load shedding – preferential trips of non-critical equipment Advanced generator and bus tie protection Thruster emergency stops Protective functions intended to reject faulty DP control sensors Protective function intended to reject faulty DP control reference systems It is important that all protective functions upon which the redundancy concept depends are proven with a high degree of confidence and that they will operate successfully on demand. Detection – tests are designed to prove the effectiveness of alarm and indications intended to alert the operator to potential hidden failures or that some part of the redundancy concept is not functioning correctly and may require operator intervention. Tests falling under this category include but not limited to: Thruster and azimuth command/feedback prediction errors Alarms and indications for thrusters ready, running and enabled Alarms for unscheduled stop of machinery Alarms for start of a standby pump or other service Control loop failure alarms (input errors) Alarms to indicate that a UPS or 24Vdc battery system is on battery power Alarms to indicate that a backup supply has failed Alarms related to pressure/temperature in cooling water systems Indication that a standby generator is no longer available Alarms to indicate network failure In all cases, refer to the equipment manufacturer for specific instructions. Ensure that proper reactivation protocols for all equipment are developed and properly implemented as outlined within this document or applicable industry guidance. Create a checklist identifying the support and materials required for reactivation testing. Request support well in advance of reactivation. These may include: Technical support Manufacturer or vendor support Third party surveyor/auditor support