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Information Notes

IMCA produces a range of materials for its members as information notes, covering safety, technical, regulatory, commercial and various other issues relevant to its members.

Members can access all of these materials by logging in to this site. Non-members can view titles, for information, and a small number of individual articles deemed of wider public interest.

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Information Notes

Combined Heading/Motion and Gyro Sensor Concerns

The IMCA DP Committee has been made aware of potential common-mode failures regarding Combined Gyro Compass and Motion Reference Sensors (MRU). These potential failures are discussed below and must be understood and considered while using/updating/purchasing combination MRU/Gyro, or gyro sensors that may rely on a GNSS signal to remain functional.

| Information Note number 1633

Field Arrival Trials

What are Field Arrival Trials? A pre-defined programme of tests and checks to be performed prior to the entry into the area of operation that are designed to confirm the […]

| Information Note number 1628

ASOG – The Decision Support Tool You Need

Following a review of the 2021 Annual DP Station Keeping Event Report published by IMCA in March 2022, the IMCA Marine Division Management Committee & DP Committee agreed that an objective for 2022 was to create an information note explaining the subject of Activity Specific Operating Guidelines (ASOG) and its

| Information Note number 1618

FMEA – Five Yearly Review

Guidance and lessons learned may be missed if the FMEA/FMECA document is not periodically refreshed.  A neglected DP system FMEA/FMECA may lead to a reduction in robustness, resilience, and single fault tolerance if it is only updated after deficiencies have been identified by a vessel DP Assurance process or after

| Information Note number 1605

GPS systems – Warning of interference

The United States Department of Transportation Maritime Administration (MARAD) has issued revised advisory notice 2020-016-Various-GPS Interference on multiple instances of significant GPS interference that have been reported worldwide. This interference is resulting […]

| Information Note number 1525 | Original reference(s) IMCA M 15/20, IMCA S 01/20

DPO Certification – The available schemes

DPO Certification – The available schemes: There are currently three organisations offering DPO certification. Each organisation states that the training scheme is in accordance with IMCA M 117 – Guidelines for the Training and Experience of Key DP Personnel. This information note provides an outline of each scheme. It does

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| Information Note number 1501 | Original reference(s) IMCA M 11/20

The nautical institute dynamic positioning training executive group (NI DPTEG) minutes and action points, May 2019

These are the minutes and action points of the DPTEG meeting held in May 2019. Please direct comments or questions to Andy Goldsmith [email protected]. Originally issued with the following reference(s): IMCA M 02/19

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| Information Note number 1448 | Original reference(s) IMCA M 02/19

Toolbox talk prompts – CTV transfer with DP vessel

This information note was produced under the supervision of the IMCA Marine Renewable Energy Committee.  Prior to a personnel transfer to or from a DP vessel, check and confirm that: Combined responsibility: Weather windows are suitable and communicated to allow transfer;Site and task risk assessments are available to cover specific

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| Information Note number 1447 | Original reference(s) IMCA M 01/19

GNSS interference, jamming and spoofing

This briefing provides a brief overview of global navigation satellite system (GNSS) interference, jamming and spoofing. Interference is the unintentional transmission of signals stopping the reception of the GNSS signals.Jamming is the intentional interference of the GNSS signal reception to deny the receiver GNSS signals.Spoofing is the practice of tricking

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| Information Note number 1436

Reactivation of DP vessels following a period of lay-up

This information note was produced under the supervision of the IMCA Marine Division Management Committee (MDMC). During 2017, the committee recognised that with improving industry metrics, member companies could now be considering reactivating their owned and managed vessels, following a period of layup.  This note has been produced as a

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| Information Note number 1411 | Original reference(s) IMCA M 02/18

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