How Are Nautical Charts Corrected On Board Ships? Chart – 5011 Symbols and abbreviations to be used on charts. Chart 5011 (INT 1 Format) Edition 4 - October 2008 SYMBOLS and ABBREVIATIONS used on Admiralty Charts CONTENTS System for Updating inside front cover. Welcome to Maryland Nautical Sales where you can purchase nautical charts, books and other navigational resources at 10 - 40% off.
