Electronic Navigational Chart (ENC) Updating Study

This report summarizes the work performed by the United States Coast Guard (USCG) Research and Development Center from 1994 to 1997 in the area of electronic chart updating. The first objective of this effort was to determine the impact of electronic navigational chart updating on the USCG infrastructure that provides paper chart corrections. The second objective was to examine and suggest modifications to three international standards involved with updating the electronic navigational chart (ENC). Field trial testing was conducted to evaluate international standards and provide feedback for their development. A prototype display system was developed to test display concepts and gather mariner input. A prototype electronic chart update (ECU) was developed to evaluate information and technology requirements for producing ECUs. From sea trial testing the author developed and tested a method for displaying colors and symbols for manual updating of electronic charts. This method was adopted by the international community and incorporated into the standards. The prototype ECU makes use of the IHO S57 standards. The function, content, and format of the ECU proved to be an acceptable replacement for the USCG Local Notice to Mariner (LNM). The ECU bridges the gap between the current LNM structure and the S57 standard by providing the update in a format which is computer friendly and human readable. This study also determined that the current Aids to Navigation Information System and LNMs do not have the capability to support the ECU or other Electronic Chart System updating requirements.

  • Record URL:
  • Corporate Authors:

    United States Coast Guard

    Research and Development Center, 1082 Shennecossett Road
    Groton, CT  United States  06340-6096

    United States Coast Guard

    2100 Second Street, SW
    Washington, DC  United States  20593

    Department of Transportation

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Gonin, Irene M
  • Publication Date: 1998-1


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 252p

Subject/Index Terms

Filing Info

  • Accession Number: 01717774
  • Record Type: Publication
  • Report/Paper Numbers: CG-D-19-98, R&DC 02/98
  • Created Date: Aug 29 2019 12:42PM