{"id":210,"date":"2026-03-30T00:26:51","date_gmt":"2026-03-30T00:26:51","guid":{"rendered":"https:\/\/marinersupdate.com\/blog\/?p=210"},"modified":"2026-03-30T00:57:35","modified_gmt":"2026-03-30T00:57:35","slug":"nox-amendment-new-marine-diesel-engine-test-procedure","status":"publish","type":"post","link":"https:\/\/marinersupdate.com\/blog\/nox-amendment-new-marine-diesel-engine-test-procedure\/","title":{"rendered":"Nox Amendment- New Marine Diesel Engine test procedure"},"content":{"rendered":"\n<p><strong>IMO Approves NOx Code Amendment (MEPC.398(83))<\/strong><\/p>\n\n\n\n<p><strong>Key Updates:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>New rules for <strong>certification of modified marine engines<\/strong><\/li>\n\n\n\n<li>Applies when engines undergo <strong>substantial modification<\/strong> or shift to a <strong>different NOx Tier<\/strong><\/li>\n\n\n\n<li>Introduces <strong>new engine emission test procedures<\/strong><\/li>\n\n\n\n<li>Requires <strong>updated engine nameplate<\/strong> if power\/speed changes<\/li>\n\n\n\n<li>Certification allowed for <strong>individual engine or engine group (not family)<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>Testing &amp; Compliance:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Minimum <strong>85% load required<\/strong> for test cycle (if achievable)<\/li>\n\n\n\n<li>New <strong>engine emission test plan approval<\/strong> needed<\/li>\n\n\n\n<li>Monitoring of <strong>ambient conditions &amp; performance mandatory<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>Timeline:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Deemed accepted:<\/strong> 1 March 2026<\/li>\n\n\n\n<li><strong>Entry into force:<\/strong> 1 September 2026<\/li>\n<\/ul>\n\n\n\n<p><strong>Impact:<\/strong><br>Stricter compliance for modified engines, ensuring better NOx emission control and environmental protection<\/p>\n\n\n\n<p>For more details refer the below Mepc 398 (83) circular<\/p>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\" hidden class=\"wp-block-file__embed\" data=\"https:\/\/marinersupdate.com\/blog\/wp-content\/uploads\/2026\/03\/MEPC.398_83-amendment-to-the-nox-technical-code_.pdf\" type=\"application\/pdf\" style=\"width:100%;height:600px\" aria-label=\"Embed of MEPC.398_83 amendment to the nox technical code_.\"><\/object><a id=\"wp-block-file--media-3b7ba4b4-30b2-423d-8e00-67a26a574f10\" href=\"https:\/\/marinersupdate.com\/blog\/wp-content\/uploads\/2026\/03\/MEPC.398_83-amendment-to-the-nox-technical-code_.pdf\">MEPC.398_83 amendment to the nox technical code_<\/a><a href=\"https:\/\/marinersupdate.com\/blog\/wp-content\/uploads\/2026\/03\/MEPC.398_83-amendment-to-the-nox-technical-code_.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-3b7ba4b4-30b2-423d-8e00-67a26a574f10\">Download<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>IMO Approves NOx Code Amendment (MEPC.398(83)) Key Updates: Testing &amp; Compliance: Timeline: Impact:Stricter compliance for modified engines, ensuring better NOx emission control and environmental protection For more details refer the below Mepc 398 (83) circular<\/p>\n","protected":false},"author":3,"featured_media":212,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,18],"tags":[61,8,27,26,86,79,83,25,78],"class_list":["post-210","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-imo-solas-marpol-stcw-loadline-ism-isps-statutory","category-tech-technical-circular-marine","tag-compliance","tag-marinersupdate","tag-sire","tag-maritime","tag-maritime-safety","tag-maritime-security","tag-oil-tanker","tag-seafarer-2","tag-shipping-industry"],"_links":{"self":[{"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/posts\/210","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/comments?post=210"}],"version-history":[{"count":1,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/posts\/210\/revisions"}],"predecessor-version":[{"id":213,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/posts\/210\/revisions\/213"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/media\/212"}],"wp:attachment":[{"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/media?parent=210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/categories?post=210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/marinersupdate.com\/blog\/wp-json\/wp\/v2\/tags?post=210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}