Admiralty Charts affected by the Publication List Admiralty Chart 120 ...

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Admiralty Charts Chart to be WITHDRAWN Main Title I ADMIRALTY CHARTS INDEPENDENTLY WITHDRAWN NZ8234 South Pacific Ocean, Tonga or Friendly Islands, Vavau Group. NZ8235 South Pacific Ocean, Anchorages in the Friendly Islands. SC1166 1 st Edition England – West Coast, River Severn – Avonmouth to Sharpness and Hock Cliff. Caution regarding use of ECDIS in standard display mode ADMIRALTY AVCS AND ECDIS SERVICE Mariners are advised of a potentially serious concern that has come to light relating to the way ECDIS displays and operates with some shoal soundings. A very small proportion of shoal soundings, especially those marked as “reported” on paper charts, will not be visible when operating in the base or standard display modes and may not trigger automatic grounding alarms in any display mode, even if their depth is less than the vessel safety depth set in the ECDIS. This is due to the specific manner in which these particular shoal soundings have been encoded in some ENCs. Because of the potential impact on safety of navigation, ENC producing nations are re-examining all their ENCs and taking corrective action where this is necessary. ENCs produced by the UKHO (identified by Country Code GB) and a number of other nations have now been corrected. Where available, further information on the corrective action taken is available in the readme.txt file on UKHO’s ECDIS and AVCS service CDs, which are updated weekly. As a precaution the NAVAREA 1 warning issued on 15 February 2010 will remain in force until further notice. The text of the warning is as below. Some ENC producer nations may also promulgate local Notices to Mariners. NAVAREA 1 - Warning 037/10 Mariners are advised that ECDIS may not display some isolated shoal depths when operating in “base or standard display” mode. Route planning and monitoring alarms for these shoal depths may not always be activated. To ensure safe navigation and to confirm that a planned route is clear of such dangers, mariners should visually inspect the planned route and any deviations from it using ECDIS configured to display “all data”. The automated voyage planning check function should not be solely relied upon. The International Hydrographic Organization (IHO) is leading technical action to resolve this matter. Further information will be made available through Notices to Mariners. The README.TXT file located within the ENC_ROOT folder on the latest Base and Update discs contains important safety related information relating to the contents of the disc. This file is updated on a regular basis and should be consulted to ensure that all related issues are taken into consideration. The last 3 updates are identified at the start of the file. The latest README.TXT file is also located on the UKHO website at: www.ukho.gov.uk/ProductsandServices/ElectronicCharts/Documents/README.txt Latest Issue Dates of the AVCS and ECDIS Base CDs is Week 31/10, 5 August 2010. 1.15 denotes chart available in the ARCS series.
I ADMIRALTY RASTER CHART SERIES – LATEST ISSUE DATES OF REGIONAL DISCS RC RC1 RC2 RC3 RC4 RC5 RC6 RC7 Last issue date 8 th July 2010 30 th July 2009 4 th March 2010 19 th February 2009 1 st April 2010 20 th May 2010 19 th November 2009 RC8 22 nd July 2010 RC9 6 th May 2010 RC10 3 rd December 2009 RC11 8 th May 2008 1.16 Reissue Date denotes chart available in the ARCS series.
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Admiralty Charts affected by the Publication List Admiralty Chart 120 ...

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