Find out more about the types of IMCA documents and our definitions

    • Glossary
    • Background
    • Introduction
    • Generic Message
      • Position
      • Stationing
      • Heading
      • Attitude
      • Bathymetry
      • Burial
      • Acoustic
      • Tow
      • Message
      • Auxiliary
    • Examples of Generic Messages
    • Anchor Spread Message
    Date: Reason: Revision:
    Date:March 2024 Reason:Refresh of preface and layout, but no change to content Revision:Rev. 2.2
    Date:October 2019 Reason:Members of the Offshore Survey Division Management Committee reviewed and found that it remains fit for purpose Revision:Rev. 2.1
    Date:February 2014 Reason:Revised and updated Revision:Rev. 2
    Date:April 2003 Reason:Minor updates Revision:Rev. 1
    Date:March 2003 Reason:Initial publication Revision:Rev. 0