{"id":371,"date":"2020-10-22T14:28:38","date_gmt":"2020-10-22T14:28:38","guid":{"rendered":"https:\/\/maritimesa.org\/nautical-science-grade-11\/?p=371"},"modified":"2021-01-07T08:22:11","modified_gmt":"2021-01-07T08:22:11","slug":"finding-the-estimated-position-ep-allowing-for-a-current","status":"publish","type":"post","link":"https:\/\/maritimesa.org\/nautical-science-grade-11\/2020\/10\/22\/finding-the-estimated-position-ep-allowing-for-a-current\/","title":{"rendered":"Finding the estimated position (EP) allowing for a current"},"content":{"rendered":"<p>The following example is used to explain the procedure to follow:<\/p>\n<p><strong>Problem:<\/strong><br \/>\nFrom an observed position at 1200 a vessel steers 110\u00b0 (T) at 10 knots. The current is setting 350\u00b0 (T) at 2 knots. Determine the estimated position for 1330.<\/p>\n<p><strong>Solution:<\/strong><\/p>\n<ol>\n<li>Plot the true course from the 1200 position.<\/li>\n<li>Plot the DR position for 1330.<\/li>\n<li>Calculate the drift for the time interval (2 x 1\u00bd)miles. This will constitute the current vector at 1330.<\/li>\n<li>Draw the current vector from the DR position.<\/li>\n<li>The EP will be at the end of the current vector.<\/li>\n<li>Plot the EP.<\/li>\n<\/ol>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r.jpg\" alt=\"\" width=\"900\" height=\"501\" class=\"alignnone size-full wp-image-579\" srcset=\"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r.jpg 900w, https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r-300x167.jpg 300w, https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r-768x428.jpg 768w, https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r-260x146.jpg 260w, https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r-50x28.jpg 50w, https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-content\/uploads\/sites\/6\/2021\/01\/11.1.8.6_fig_1_r-135x75.jpg 135w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The following example is used to explain the procedure to follow: Problem: From an observed position at 1200 a vessel steers 110\u00b0 (T) at 10 knots. The current is setting 350\u00b0 (T) at 2 knots. Determine the estimated position for 1330. Solution: Plot the true course from the 1200 position. [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,64,70],"tags":[],"class_list":["post-371","post","type-post","status-publish","format-standard","hentry","category-11-1-navigation","category-11-1-8-currents-and-tidal-streams","category-11-1-8-6-finding-the-estimated-position-allowing-for-a-current"],"_links":{"self":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/posts\/371"}],"collection":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/comments?post=371"}],"version-history":[{"count":3,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/posts\/371\/revisions"}],"predecessor-version":[{"id":589,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/posts\/371\/revisions\/589"}],"wp:attachment":[{"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/media?parent=371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/categories?post=371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/maritimesa.org\/nautical-science-grade-11\/wp-json\/wp\/v2\/tags?post=371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}