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Electronic Navigational Chart (ENC) Updating Study: Final Report


Year: 1998
Language: english
Author: Irene M. Gonin
Publisher: U.S. Coast Guard Research and Development Cente
Format: PDF
Quality: Scanned pages + text layer
Pages count: 252
Description: This report summarizes the work performed by the 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 U. S. Coast Guard 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 electronic
chart updates.
From our sea trial testing we 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.

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