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The notice explains how mariners should report newly discovered hazards, changes or defects in aids to navigation, and shortcomings in Indonesian charting information. It provides explanatory notes covering dual-language use, preliminary/temporary notice markings, coordinate and bearing conventions, chart correction terminology, and related symbols. It also lists correction references by IDNM number, plus a publication list with edition years, and contact information.",{"@graph":63,"@context":118},[64,80,101],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":51,"@type":70,"position":76},"https://docshare.wps.com/template/general/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/indonesian-notices-to-mariners-nr-20-15th-may-2026/564267/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/indonesian-notices-to-mariners-nr-20-15th-may-2026/564267.png","ImageObject",442,249,{"name":88,"@type":89},"SundayMiles","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/pdf","2026-10-28","2026-10-12",true,{"@type":98,"interactionType":99,"userInteractionCount":15},"InteractionCounter",{"@type":100},"ViewAction",{"@type":102,"mainEntity":103},"FAQPage",[104,110,114],{"name":105,"@type":106,"acceptedAnswer":107},"What is the purpose of Indonesian Notices to Mariners (IDNM) Nr. 20?","Question",{"text":108,"@type":109},"It is prepared and broadcast weekly by Pushidrosal to correct nautical charts and other related publications, and to guide mariners on updates and reporting of hazards and deficiencies.","Answer",{"name":111,"@type":106,"acceptedAnswer":112},"How are preliminary and temporary notices identified in IDNM numbers?",{"text":113,"@type":109},"Preliminary notices are signed with (P) and temporary notices with (T) in the IDNM number. An additional sign (x) indicates the notice was previously issued as preliminary or temporary.",{"name":115,"@type":106,"acceptedAnswer":116},"Which coordinate and bearing conventions are used for corrections?",{"text":117,"@type":109},"Horizontal coordinates are generally presented in Latitude Longitude using WGS-84, with adaptations to other datums when applicable. Bearings and directions are presented in degrees, and light-sector bearings are taken from the ship’s position toward the target.","https://schema.org",{"og:url":78,"og:type":120,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":122,"canonical":78},"index,follow",{"doc_id":124,"site_id":56},564267,1792025269,{"code":4,"msg":5,"data":127},{"doc_id":124,"user_id":128,"nickname":88,"user_avatar":129,"doc_module":9,"category_id":50,"category_name":51,"doc_title":59,"doc_description":61,"doc_content":130,"file_id":131,"file_url":132,"file_type":133,"file_size":134,"view_count":15,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":135,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":141},1099529839202,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","IDNM Nr.20  \nNr. 124–133/2026  \nPUSHIDROS TNI AL  \nINDONESIAN NOTICES TO MARINERS  \n15th May 2026  \n\n| Indonesian Notices to Mariners (IDNM) is prepared and broadcasted weekly by Pusat HidroOseanografi TNI AL (Pushidrosal), as a correction to nautical charts and other publications. The Mariners strongly requested to notify immediately to the Pushidrosal on the discovery of new hazards of shipping, changes or defects in aids to navigation and of shortcomings in Indonesian nautical charts and other publications (Hydrographic Note on last page). To find Pushidrosal publication please contact Distribution Sub Division. |\n| --- |\n| Contents |\n| I. Explanatory Notes. Publication List\u003Cbr>II. Indonesian Notices to Mariners\u003Cbr>III. Preliminary (P) and Temporary (T) Notices\u003Cbr>IV. Amendments to Publications\u003Cbr>V. Other Information and Hydrographic Note |\n| Information The weekly Indonesian Notices to Mariners the Pushidrosal website:\u003Cbr>www.pushidrosal.id\u003Cbr>Information lightning/urgency and complaints can contact service pusdalops: Email : pusdalops@pushidrosal.id\u003Cbr>Phone : +62-85290003537\u003Cbr>Chief Hydrographer,\u003Cbr>Dr. Budi Purwanto, S. T., M.M.\u003Cbr>Vice Admiral\u003Cbr>CopyrightAll Rights Reserved |\n\nPushidrosal  \nPantai Kuta Street V Nr.1 Ancol East 14430 North Jakarta, Indonesia  \nE-mail : infohid@pushidrosal.id  \nPhone : +6221 64714810  \nFax : +6221 64714819  \nNautical Chart Depot Primkopal Hidros  \nEnggano Street Nr.18 Tanjung Priok 14310 North Jakarta, Indonesia  \nPhone: (021) 22435326; (021) 4305053  \nMobile Phone: +6282245451100  \nEXPLANATORY NOTES. NOTICE TO MARINERS GUIDANCE  \n\n| 1. | Indonesian Notices to Mariners using dual languages Indonesian and English. |\n| --- | --- |\n| 2. | Asterisk (*) on IDNM numbers indicates that sources are based on original information from Indonesia. |\n| 3. | Preliminary and Temporary notices are signed with (P) and (T) in IDNM numbers and sign (x) indicates that IDNM has previously been issued as Preliminary or Temporary notices with used term : Collapsed, Missing, Extinguished, Relit, Damaged and Drifted. |\n| 4. | Location of the object that issued is described in general or detailed. |\n| 5. | Lights object described by information light numbers in Indonesian List of Lights (IDLL). |\n| 6. | Affected charts are the latest of printed and edition can be seen in the latest edition of Indonesian Charts Catalogue. |\n| 7. | Horizontal coordinates are generally presented in Latitude Longitude World Geodetic System 1984 with \u003CWGS-84> mark. Presentation of the coordinates in another system adapted to its Datum, Example: \u003CBessel Djakarta>. When an unknown coordinate system marked by \u003CUnknown>, and if the coordinates are approximates marked with \u003CPA>(Position Approximate) |\n| 8. | The Bearings and Directions presented in degrees. For Bearings and Directions associated with the light sectors are taken from the ship's position towards to the target. |\n| 9. | Terms used in correcting the Charts consist of:\u003Cbr>a. Insert, corrections or additions related to adding new information.\u003Cbr>b. Amend, corrections related changes attributes on an object.\u003Cbr>c. Substitute, correction associated replacement of an object by other objects.\u003Cbr>d. Move, corrections related changes in the coordinates of an objects.\u003Cbr>e. Delete, correction concerning the elimination of objects. |\n| 10. | Some Notices affected with line or area is also displayed in the chartlet, to help Mariners on knowing the position of the objects, e.g. laying of submarine cables or restricted area. |\n| 11. | Related Symbols could be seen on Chart Nr.1 |\n| 12. | Radio Navigation Warning broadcast daily by Coast Radio Station (Could be seen in List of Coastal Radio Station) with name Hydro-Indo. |\n| 13. | The time is considered with Indonesian Western Part Time (WIB). |\n\nPushidrosal  \nPantai Kuta Street V Nr.1 Ancol East 14430 North Jakarta, Indonesia  \nE-mail : infohid@pushidrosal.id  \nPhone : +6221 64714810  \nFax : +6221 64714819  \nNautical Chart Depot Primkop","cbCaimpMRN1iUARf","https://ap.wps.com/l/cbCaimpMRN1iUARf","pdf",394648,19,"English","# Contents\n## I. Explanatory Notes. Publication List\n## II. Indonesian Notices to Mariners\n## III. Preliminary (P) and Temporary (T) Notices\n## IV. Amendments to Publications\n## V. Other Information and Hydrographic Note\n# EXPLANATORY NOTES. NOTICE TO MARINERS GUIDANCE\n# EXPLANATORY NOTES. LIST OF CORRECTION\n# EXPLANATORY NOTES. LIST OF PUBLICATION","[{\"question\":\"What is the purpose of Indonesian Notices to Mariners (IDNM) Nr. 20?\",\"answer\":\"It is prepared and broadcast weekly by Pushidrosal to correct nautical charts and other related publications, and to guide mariners on updates and reporting of hazards and deficiencies.\"},{\"question\":\"How are preliminary and temporary notices identified in IDNM numbers?\",\"answer\":\"Preliminary notices are signed with (P) and temporary notices with (T) in the IDNM number. An additional sign (x) indicates the notice was previously issued as preliminary or temporary.\"},{\"question\":\"Which coordinate and bearing conventions are used for corrections?\",\"answer\":\"Horizontal coordinates are generally presented in Latitude Longitude using WGS-84, with adaptations to other datums when applicable. Bearings and directions are presented in degrees, and light-sector bearings are taken from the ship’s position toward the target.\"}]","INDONESIAN NOTICES TO MARINERS - Nr. 20 - 15th May 2026 | PDF",1791841192,7]