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It defines official charts and distinguishes Electronic Navigational Charts (ENC) from Raster Navigational Charts (RNC) and from private charts, including why private charts are not accepted under SOLAS for navigation. It summarizes SOLAS Chapter V carriage obligations and details what an Official ENC is, including its standardized structure for ECDIS and the information needed for safe navigation, plus possible supplementary data.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/a-complete-guide-to-enc-electronic-navigational-chart-part-1-what-are-official-charts/669377/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/a-complete-guide-to-enc-electronic-navigational-chart-part-1-what-are-official-charts/669377.png","ImageObject",300,407,{"name":92,"@type":93},"404brain","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-03","2026-11-01",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What makes a chart an official chart for carriage requirements?","Question",{"text":112,"@type":113},"Charts and ENCs issued by or on the authority of a Government or authorized hydrographic office (or relevant government institutions) are official, provided they are kept up to date.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why aren’t private nautical charts accepted for navigation under SOLAS?",{"text":117,"@type":113},"All other nautical charts are not official by definition and are often called private charts. They are not accepted as the basis for navigation under the SOLAS convention.",{"name":119,"@type":110,"acceptedAnswer":120},"What is an Official ENC and what is it used for?",{"text":121,"@type":113},"An Electronic Navigational Chart (ENC) is a standardized database issued for use with ECDIS by government-authorized hydrographic offices. 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.............................................................................................................................................. 2  \nWhat are the IMO requirements for the carriage of nautical charts?.......................................................................... 2  \nWhat is an Official ENC?................................................................................................................................................ 2  \nAttributes of an ENC ..................................................................................................................................................... 2  \nHow do I recognise an official ENC? ............................................................................................................................. 3  \nIHO standards used in ENC ........................................................................................................................................... 4  \nWhat is S-52? ................................................................................................................................................................ 4  \nPresentation Library...................................................................................................................................................... 4  \nWhat are the changes within Presentation Library 4.0? .............................................................................................. 5  \nWhat is S-57? ................................................................................................................................................................ 5  \nWhat is S-58? ................................................................................................................................................................ 5  \nWhat is S-63? ................................................................................................................................................................ 5  \nHow are official ENCs protected? ................................................................................................................................. 5  \nHow are ENCs kept up-to-date? ................................................................................................................................... 6  \nHow do I check that all updates have been applied to the official ENC? ..................................................................... 6  \nCompilation scale of ENC .............................................................................................................................................. 6  \nNavigational purpose categories of ENC....................................................................................................................... 7  \nNavigational Purpose Name Scale Range ..................................................................................................................... 8  \nA Complete guide to ENC (Electronic Navigational Chart) PART 2 ................................................................................... 9  \nIntroduction .................................................................................................................................................................. 9  \nWorldwide Electronic Navigational Chart Database..................................................................................................... 9  \nHow are official ENCs named ..................................................................................","cbCaipN3t3Akgzg8","https://ap.wps.com/l/cbCaipN3t3Akgzg8","pdf",581509,12,"English","# A Complete guide to ENC (Electronic Navigational Chart)\n## PART 1\n## What are official charts ?\n## What are the IMO requirements for the carriage of nautical charts?\n## What is an Official ENC?\n## Attributes of an ENC\n## How do I recognise an official ENC?\n## IHO standards used in ENC\n## How are official ENCs protected?\n## How are ENCs kept up-to-date?\n## Compilation scale of ENC\n## Navigational purpose categories of ENC\n# A Complete guide to ENC (Electronic Navigational Chart)\n## PART 2\n## Introduction","[{\"question\":\"What makes a chart an official chart for carriage requirements?\",\"answer\":\"Charts and ENCs issued by or on the authority of a Government or authorized hydrographic office (or relevant government institutions) are official, provided they are kept up to date.\"},{\"question\":\"Why aren’t private nautical charts accepted for navigation under SOLAS?\",\"answer\":\"All other nautical charts are not official by definition and are often called private charts. They are not accepted as the basis for navigation under the SOLAS convention.\"},{\"question\":\"What is an Official ENC and what is it used for?\",\"answer\":\"An Electronic Navigational Chart (ENC) is a standardized database issued for use with ECDIS by government-authorized hydrographic offices. It contains chart information necessary for safe navigation and may include supplementary information.\"}]","A Complete guide to ENC (Electronic Navigational Chart) - Part 1 - What are official charts? | PDF"]