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However, only charts issued by or on the authority of a government and official Hydrographic Office are classified as official charts and authorised to fulfil carriage requirements.Any other type of chart (private charts) are not permitted as tools for navigation under the IMO SOLAS convention.DNV GL has been approached by customers uncertain about how to interpret the new requirements for their fleet in service. A confirmation of this anticipation can unfortunately not be expected until the implementation date has been passed. For existing ECDIS installations, the IMO has addressed the issue of software maintenance in guideline MSC.1/Circ.1503.There are two types of OFFICIAL digital/electronic charts – Raster Navigational Charts (RNC) and Electronic Navigational Charts (ENC) which are known as vector charts: Raster (RNC) – this is purely a scanned and passive image of a paper chart.
Here is a list of some of the most frequently asked questions about ECDIS. Put in simpler terms it is a computer-based navigation system that integrates electronic navigational charts (ENC), position information from the Global Positioning System (GPS) and other navigational sensors, such as radar, fathometer and automatic identification systems (AIS) to provide an alternative to paper navigation charts. A timetable of the implementation dates can be found below. IMO requirements are for all vessels engaged on international voyages to carry nautical charts on board.DNV GL has recently experienced an increased number of queries related to the update of ECDIS software and upgrade or replacement of existing ECDIS installations. The International Hydrographic Organization (IHO) has revised its ECDIS standards, with an implementation date of 1 September 2017. The general perception in the maritime industry appears to be that the guideline shall be followed and that an ECDIS upgrade must be conducted for ships in service.A new ECDIS installed after 31 August 2017 shall conform to the latest IHO standards. Most flag administrations have addressed compliance with the latest IHO standards as mandatory for ships flying their flag. We expect that several port states will also consider an upgrade as mandatory, and that lack of upgrading may be considered a deficiency, which could lead to detainment.Please check the software version in the appropriate ECDIS model instruction manual and arrange to upgrade to the latest software, if the installed software version of the ECDIS is earlier than the following versions.Please use paper charts until software is upgraded to the latest versions.
The Overlay is displayed as a single layer on top of the basic ENC and is available as part of the TADS service.