and the conventional paper chart do not necessarily have to be identical in their appearance. ECDIS combines chart and navigational positioning information. It should be noted that modern navigation systems (For example, differential GPS) may offer a more accurate positioning than was available to position some of the surveys from which the digital chart data ENC was derived. The display categories specified in the IMO ECDIS Performance Standards and the IHO priorities of the various types of chart information (alarms, updates, mariners and non-HO chart data, etc.) are applied to every feature by the display category and draw priority assignments that are contained within the S-101 portrayal catalogue. Depth information should only be displayed as it has been provided in the ENC and not adjusted by tidal height. If the ECDIS has integrated the use of a S-100 based tidal product specification, it may display the adjusted tide as an italicized offset to the sounding in the ENC. C2.1.2 Function and Use of S-101 portrayal The IHO has produced S-101, in to ensure that hydrographic data supplied by its Member States' HO is used in a manner that will enhance the safety and efficiency of navigation by satisfying the requirements set out in the IMO ECDIS Performance Standards. Users of these Specifications should also refer to publications of the International Electrotechnical Commission (IEC) when dealing with equipment design and tests. C2.1.3 Type Approval - Minor Deviations to the S-101 Portrayal Catalogue It is acknowledged that the manufacturers of navigational equipment and software are in constant contact with ECDIS users. To allow for fast response to suggestions for improvement to the chart display, the IHO S-101 Product Specification for ECDIS is designed to provide a framework and guideline for chart symbolization from which the ECDIS manufacturer may derive a customized presentation. The following criteria should serve as a guide for judging whether any symbolization on an ECDIS which is visibly different from the symbolization provided by the IHO S-101 Portrayal Catalogue and as demonstrated by the IHO Test Dataset print-outs is still compliant. The symbolization used: should be the same in general shape and size as the IHO version; should be and sharp so that there is no uncertainty over meaning; should be close enough to the IHO version to avoid ambiguity in meaning between that model and any other model of ECDIS; should use only the colours as specified in S-101;
and the conventional paper chart do not necessarily have to be identical in their appearance. ECDIS combines chart and navigational positioning information. It should be noted that modern navigation systems (For example, differential GPS) may offer a more accurate positioning than was available to position some of the surveys from which the digital chart data ENC was derived. The display categories specified in the IMO ECDIS Performance Standards and the IHO priorities of the various types of chart information (alarms, updates, mariners and non-HO chart data, etc.) are applied to every feature by the display category and draw priority assignments that are contained within the S-101 portrayal catalogue. Depth information should only be displayed as it has been provided in the ENC and not adjusted by tidal height. If the ECDIS has integrated the use of a S-100 based tidal product specification, it may display the adjusted tide as an italicized offset to the sounding in the ENC. C2.1.2 Function and Use of S-101 portrayal The IHO has produced S-101, in to ensure that hydrographic data supplied by its Member States' HO is used in a manner that will enhance the safety and efficiency of navigation by satisfying the requirements set out in the IMO ECDIS Performance Standards. Users of these Specifications should also refer to publications of the International Electrotechnical Commission (IEC) when dealing with equipment design and tests. C2.1.3 Type Approval - Minor Deviations to the S-101 Portrayal Catalogue It is acknowledged that the manufacturers of navigational equipment and software are in constant contact with ECDIS users. To allow for fast response to suggestions for improvement to the chart display, the IHO S-101 Product Specification for ECDIS is designed to provide a framework and guideline for chart symbolization from which the ECDIS manufacturer may derive a customized presentation. The following criteria should serve as a guide for judging whether any symbolization on an ECDIS which is visibly different from the symbolization provided by the IHO S-101 Portrayal Catalogue and as demonstrated by the IHO Test Dataset print-outs is still compliant. The symbolization used: should be the same in general shape and size as the IHO version; should be and sharp so that there is no uncertainty over meaning; should be close enough to the IHO version to avoid ambiguity in meaning between that model and any other model of ECDIS; should use only the colours as specified in S-101;
S-101%20ENC%20Product%20Specification%2020160114%20post%20baseline%200.0.2.docx