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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.

Browse our most recent information notes below, or use the filters to view our archives by subject and/or year.

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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

Common industry technical specification for USBL Positioning systems

The IOGP Geomatics Committee has released Report 624-01 – Common Industry Technical Specification for the Calibration and Verification of Ultra Short Baseline (USBL) Positioning Systems.  The Report has been produced by the Surveying and Positioning Subcommittee’s Ultra Short Base Line (USBL) Task Force, which consisted of professionals from oil and

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| Information Note number 1463 | Original reference(s) IMCA S 04/19

Shallow water survey operations

Members in certain areas, notably, parts of the Middle East, have suggested the possibility of IMCA guidance on shallow water surveying being developed.  The Offshore Survey Division Management Committee (OSDMC) notes that there are existing resources available on this topic, which will be of use and interest to members.  This

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| Information Note number 1444 | Original reference(s) IMCA S 03/19

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

Evaluation of public consultation on evaluating the effectiveness of the Offshore Safety Directive (OSD)

IMCA recently participated in the Public Consultation on evaluating the effectiveness of the Offshore Safety Directive (OSD). As a follow on to that, the European Commission has formally requested both qualitative and quantitative data from stakeholders in an attempt to link the data with the requisite evaluation criteria adopted by

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| Information Note number 1429

IMO’s work on the regulatory scoping exercise for the use of maritime autonomous ships (MASS)

IMCA would like to advise its’ members that the IMO has now agreed a Framework for the regulatory scoping exercise on Maritime Autonomous Surface Ships (MASS) which is scheduled to take place during 2019. The aim of this exercise is to determine how safe, secure and environmentally sound MASS operations

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| Information Note number 1426


IOGP Report 373-24, Geomatics Guidance Note 24 – Vertical data in oil and gas applications

The International Association of Oil & Gas Producers (IOGP) has released Geomatics Guidance Note 24 on Vertical data in oil and gas applications. This guidance note discusses issues associated with vertical Coordinate Reference Systems (CRSs), in particular those related to coordinate operations (coordinate conversions and coordinate transformations) and metadata. It is

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| Information Note number 1388


IOGP publishes SSDM V2 and V1.1 of P6/11 Seismic bin grid data exchange format

The International Association of Oil & Gas Producers (IOGP) has made new and recent releases of SSDM V2 and P6/11 V1.1. Please see these two news items (also published via IOGP pages: www.iogp.org/blog/category/press-releases/geomatics-press-releases), which are aimed at its stakeholders and the wider oil & gas industry, notifying us of: First,

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| Information Note number 1371

IOGP Report 373-23, Geomatics Guidance Note 23 – Web Mercator

The International Oil & Gas Producers Association (IOGP) has published Report 373-23, Geomatics Guidance  Note 23 – Web Mercator. This guidance note aims to clarify the main issues associated with the usage of the Web Mercator Coordinate Reference System (CRS), clear up misunderstandings about what it is, and warn against

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| Information Note number 1335 | Original reference(s) IMCA S 02/16

IOGP Technical Notes on Guidelines for the conduct of offshore drilling hazard site surveys

In 2013, the International Association of Oil & Gas Producers (IOGP) published Guidelines for the conduct of offshore  drilling hazard site surveys (IOGP No. 373-18-1). This describes oilfield good practice for conducting geophysical and hydrographic site surveys of proposed offshore drilling locations. IOGP’s new Technical Notes publication (IOGP No. 373-18-2)

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| Information Note number 1322 | Original reference(s) IMCA S 01/16

IOGP releases version 1.1 of P1 and P2 formats for Geophysical Position Data Exchange

The International Association of Oil and Gas Producers (IOGP) has released version 1.1 of its P1 and P2 geophysical position data exchange formats.  Originally released in 2012 to replace the UKOOA P1/90 and P2/94 formats, the revised versions incorporate industry feedback from the first release and provide greater flexibility –

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| Information Note number 1274 | Original reference(s) IMCA S 03/15

HSE competency management guidelines for the geophysical industry

The International Association of Oil & Gas Producers (IOGP) has published a revised version of its HSE competency management guidelines for the geophysical industry. This revised report is intended as the geophysical industry base reference for HSE competency management and training. It has been updated significantly to provide guidance to all

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| Information Note number 1255 | Original reference(s) IMCA SEL 02/15, IMCA C 02/15, IMCA S 02/15



OGP Geomatics Committee releases SeabedML Application Schema

The OGP (International Association of Oil & Gas Producers) Geomatics Committee’s Seabed Survey Data Model (SSDM) Task Force has published SeabedML, the Open Geospatial Consortium (OGC) Geography Markup Language (GML) Application Schema for SSDM version 1. OGC GML enables open data exchange of geographical features and is particularly useful on web-enabled

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| Information Note number 1239 | Original reference(s) IMCA S 05/14

Exports of certain equipment and technology to Russia

On 31 July the Council of the European Union agreed adoption of agreed restrictive measures in view of Russia’s actions destabilising the situation in eastern Ukraine. This decision gives legal value to an agreement reached at the Committee of Permanent Representatives on Tuesday 29 July and announced by European Council President

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| Information Note number 1237 | Original reference(s) IMCA S 04/14, IMCA R 03/14


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