{"id":7709,"date":"2024-03-29T16:29:34","date_gmt":"2024-03-29T08:29:34","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=7709"},"modified":"2024-05-05T23:49:39","modified_gmt":"2024-05-05T15:49:39","slug":"whats-variation-deviation","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/whats-variation-deviation\/","title":{"rendered":"What&#8217;s Variation, Deviation?"},"content":{"rendered":"<p>Reference : HKU Space Material<\/p>\n<p>True poles are the location of the geographic poles.\u00a0Rightly, the true north pole is not at same location of magnetic north pole.<\/p>\n<p><strong> Variation :<\/strong> angular difference between true direction and magnetic direction<\/p>\n<p><strong>Deviation :<\/strong> angular difference different between magnetic direction and compass direction<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-7766\" src=\"https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224048.png\" alt=\"\" width=\"1165\" height=\"691\" srcset=\"https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224048.png 1165w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224048-300x178.png 300w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224048-1024x607.png 1024w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224048-768x456.png 768w\" sizes=\"auto, (max-width: 1165px) 100vw, 1165px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-7767\" src=\"https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224122.png\" alt=\"\" width=\"1165\" height=\"712\" srcset=\"https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224122.png 1165w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224122-300x183.png 300w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224122-1024x626.png 1024w, https:\/\/tommykwan.com\/blog\/wp-content\/uploads\/2024\/03\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2024-03-30-224122-768x469.png 768w\" sizes=\"auto, (max-width: 1165px) 100vw, 1165px\" \/><\/p>\n<p>&nbsp;<\/p>\n<div class=\"embed-container\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"DeLsRKB6sD\"><p><a href=\"https:\/\/tommykwan.com\/blog\/aviation\/how-can-we-know-the-variation\/\">How can we know the variation?\u00a0<\/a><\/p><\/blockquote>\n<p><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;How can we know the variation?\u00a0&#8221; &#8212; Tommy&#039;s Diaries\" src=\"https:\/\/tommykwan.com\/blog\/aviation\/how-can-we-know-the-variation\/embed\/#?secret=2km7nAucAh#?secret=DeLsRKB6sD\" data-secret=\"DeLsRKB6sD\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Reference : HKU Space Material True poles are the location of the geographic poles.\u00a0Rightly, the true north pole is not at same location of magnetic north pole. Variation : angular difference between true direction and magnetic direction Deviation : angular difference different between magnetic direction and compass direction &nbsp; How can we know the variation?\u00a0<a class=\"read-more \" href=\"https:\/\/tommykwan.com\/blog\/aviation\/whats-variation-deviation\/\" title=\"Read More\"> <span class=\"button default\">Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68,64,65,70],"tags":[],"class_list":["post-7709","post","type-post","status-publish","format-standard","hentry","category-atpl-knowledge","category-aviation","category-bak","category-navigation"],"_links":{"self":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/comments?post=7709"}],"version-history":[{"count":7,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7709\/revisions"}],"predecessor-version":[{"id":8018,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/7709\/revisions\/8018"}],"wp:attachment":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/media?parent=7709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/categories?post=7709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/tags?post=7709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}