{"id":2299,"date":"2020-08-02T08:24:50","date_gmt":"2020-08-02T15:24:50","guid":{"rendered":"http:\/\/tradewindssailing.com\/wordpress\/?p=2299"},"modified":"2020-08-02T08:24:54","modified_gmt":"2020-08-02T15:24:54","slug":"nautical-terminator-plimsoll","status":"publish","type":"post","link":"https:\/\/www.tradewindssailing.com\/wordpress\/nautical-terminator\/nautical-terminator-plimsoll\/","title":{"rendered":"Nautical Terminator – Plimsoll"},"content":{"rendered":"\n

            Remember when you were just learning\nto sail and the boat heeled over for the first time? My instructor was calm,\nbut I\u2019m told I was yelling \u201cHelp! Yikes! Eeek!\u201d…although I\u2019m pretty sure it\nwas quite a bit more dignified than that. From ancient times to the present,\nthis feeling that the boat might capsize or sink has been, well, a concern<\/em>, for good reason. It\u2019s the space\nage, and boats are still going to the bottom.<\/p>\n\n\n\n

            The Cretans established guidelines\nfor loading boats as early as 2500 BC, but it wasn\u2019t until 1930 that there was\nan international agreement on the standards developed by an Englishman named\nPlimsoll in the 19th<\/sup> century. That circle with a line through it\nnext to a sort of ladder graphic that you see on the hull of the Red Oak\nVictory is the result. This represents the waterline maximum that the ship can\nsafely be immersed to, depending on season and salinity represented by the\nvarious horizontal lines.<\/p>\n\n\n\n

\"rec<\/figure>\n\n\n\n

            So what\u2019s safe for our sailboats?<\/p>\n\n\n\n

            The Net Register Tonnage of Tradewinds\u2019 Lionheart <\/em>is 5.49, which means the volume that can be used for cargo or passengers is 549 cubic feet. The weight of this volume of water is 549 x 7.5 [gallons per cubic foot] x 8.333 [weight of a gallon of water] = 34299 pounds. So if the boat itself weighed nothing and it was filled with water, the volume of the boat would displace 34299 pounds of water. But the empty boat already weighs 9170 pounds, so if we subtract that from 34299 we get 25129. This is equal to about 405 cubic feet or a little over 3000 gallons or roughly \u00be of Lionheart\u2019s interior volume. So if we fill Lionheart <\/em>with 3000 gallons of water, she will weigh the same as the surrounding water and sink. But this assumes a perfectly stable, flat sea. Boating enthusiasts have adopted a much more conservative rule of thumb for capacity of passengers which you will recognize: length times beam divided by 15. On Lionheart <\/em>this gives a capacity of 20, which is quite a bit more than you\u2019re likely to have aboard. If we assume 184 lbs per person, we get a total of 3680 pounds, about 1\/7th<\/sup> of what it would take to sink the boat. The other 6\/7ths represents her reserve buoyancy, allowing that heeling, and downsizing my \u201cEeek!\u201d to \u201cYow!\u201d <\/p>\n","protected":false},"excerpt":{"rendered":"

            Remember when you were just learning to sail and the boat heeled over for the first time? My instructor was calm, but I\u2019m told I was yelling \u201cHelp! Yikes! Eeek!\u201d…although I\u2019m pretty sure it was quite a bit more … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[31],"tags":[],"class_list":["post-2299","post","type-post","status-publish","format-standard","hentry","category-nautical-terminator"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_likes_enabled":true,"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/posts\/2299","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/comments?post=2299"}],"version-history":[{"count":2,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/posts\/2299\/revisions"}],"predecessor-version":[{"id":2627,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/posts\/2299\/revisions\/2627"}],"wp:attachment":[{"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/media?parent=2299"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/categories?post=2299"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tradewindssailing.com\/wordpress\/wp-json\/wp\/v2\/tags?post=2299"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}