{"id":371,"date":"2020-12-10T17:52:01","date_gmt":"2020-12-10T17:52:01","guid":{"rendered":"https:\/\/maritimesa.org\/nautical-science-grade-10\/?p=371"},"modified":"2021-09-13T19:51:05","modified_gmt":"2021-09-13T19:51:05","slug":"zone-time-at-sea","status":"publish","type":"post","link":"https:\/\/maritimesa.org\/nautical-science-grade-10\/2020\/12\/10\/zone-time-at-sea\/","title":{"rendered":"Zone time at sea"},"content":{"rendered":"<p>A uniform time keeping system has been adopted for use at sea to ensure that all vessels within certain defined limits of longitude keep the same time. The world has been divided longitudinally into 24 zones of 15\u00b0 each with the system centred on the meridian of Greenwich. The centre division lies between the meridians of 7\u00bd\u00b0 east and 7\u00bd\u00b0 west and is designated as zone 0. The zones lying to the eastward are numbered consecutively from 1 to 12 with a positive (+) prefix and those lying to westward also from 1 to 12 with a negative (-) prefix. The 12th zone is divided centrally by the 180\u00b0 meridian and both prefixes (+) and (-) appear in this zone, their position depending on the \u201cdate line\u201d. The zones are also given an alphabetical letter to identify them. The Greenwich zone is zone \u201cZ\u201d. The zones to the east are allocated the letters from \u201cA\u201d to \u201cM\u201d and omitting \u201cJ\u201d. The zones to the west are allocated the letters \u201cN\u201d to \u201cY\u201d.<\/p>\n<div id=\"attachment_158\" style=\"width: 1810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-158\" class=\"size-full wp-image-158\" src=\"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1.jpg\" alt=\"\" width=\"1800\" height=\"872\" srcset=\"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1.jpg 1800w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-300x145.jpg 300w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-768x372.jpg 768w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-1024x496.jpg 1024w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-260x126.jpg 260w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-50x24.jpg 50w, https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-content\/uploads\/sites\/5\/2020\/11\/10.1.6.1_fig_1-150x73.jpg 150w\" sizes=\"(max-width: 1800px) 100vw, 1800px\" \/><p id=\"caption-attachment-158\" class=\"wp-caption-text\">Time zones.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A uniform time keeping system has been adopted for use at sea to ensure that all vessels within certain defined limits of longitude keep the same time. The world has been divided longitudinally into 24 zones of 15\u00b0 each with the system centred on the meridian of Greenwich. The centre [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,45,47],"tags":[],"class_list":["post-371","post","type-post","status-publish","format-standard","hentry","category-10-1-navigation","category-10-1-6-measurement-of-time-at-sea","category-10-1-6-2-zone-time-at-sea"],"_links":{"self":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/371"}],"collection":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/comments?post=371"}],"version-history":[{"count":2,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/371\/revisions"}],"predecessor-version":[{"id":571,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/posts\/371\/revisions\/571"}],"wp:attachment":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/media?parent=371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/categories?post=371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-10\/wp-json\/wp\/v2\/tags?post=371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}