{"id":2223,"date":"2022-11-17T13:49:49","date_gmt":"2022-11-17T12:49:49","guid":{"rendered":"https:\/\/gissacg.fr\/?page_id=2223"},"modified":"2022-12-20T20:42:01","modified_gmt":"2022-12-20T19:42:01","slug":"epave-513-le-m4623-ludwig-janssen","status":"publish","type":"page","link":"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/","title":{"rendered":"\u00c9pave 513 &#8211; le M4623 \u00ab\u00a0Ludwig Janssen\u00a0\u00bb"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 ez-toc-wrap-right counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/#La_plongee\" >La plong\u00e9e<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/#Quelques_photos_et_video\" >Quelques photos et vid\u00e9o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/#Un_peu_dhistoire\" >Un peu d&rsquo;histoire<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/#References\" >R\u00e9f\u00e9rences<\/a><\/li><\/ul><\/nav><\/div>\n<div class=\"wp-block-image has-hover-filter-aden\">\n<figure class=\"aligncenter size-full is-resized popmake-2235 advgb-dyn-f157c06b\"><a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_ob.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_ob_v.jpg\" alt=\"\" class=\"wp-image-2190\" width=\"200\" height=\"152\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_ob_v.jpg 200w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_ob_v-150x114.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a><figcaption class=\"wp-element-caption\"> Dessin Olivier Brichet-2003<br>Reproduction interdite <\/figcaption><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"la-plongee-7fb4825c-d29e-4e29-9ab4-ddc5751e5dd0\"><span class=\"ez-toc-section\" id=\"La_plongee\"><\/span>La plong\u00e9e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\" style=\"grid-template-columns:65% auto\"><figure class=\"wp-block-media-text__media\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"577\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/7127_coatmer.jpg\" alt=\"\" class=\"wp-image-2249 size-full\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/7127_coatmer.jpg 800w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/7127_coatmer-300x216.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/7127_coatmer-768x554.jpg 768w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/7127_coatmer-150x108.jpg 150w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure><div class=\"wp-block-media-text__content\">\n<p class=\"has-text-align-center\"><strong>SHOM \u00e9pave N\u00b0 14583029 &#8211; Position GPS<\/strong> (sous r\u00e9serves, non v\u00e9rifi\u00e9) <strong>48\u00b047&rsquo;916 N &#8211; 3\u00b005&rsquo;680 W (WGS84)<\/strong> &#8211; Carte SHOM 7127<\/p>\n<\/div><\/div>\n\n\n\n<p>Il s&rsquo;agit de l&rsquo;\u00e9pave d&rsquo;un chalutier arm\u00e9 utilis\u00e9 comme dragueur de mines par la Kriegsmarine pendant la derni\u00e8re guerre (voir le petit point historique sous les photos). Cette \u00e9pave est situ\u00e9e au milieu du Trieux en aval de L\u00e9zardrieux \u00e0 la hauteur du plan d&rsquo;eau de Coatmer et de la balise des Perdrix. Il est conseill\u00e9 de plonger \u00e0 l&rsquo;\u00e9tale par petit coefficient et en \u00e9vitant les p\u00e9riodes pluvieuses \u00e0 cause du \u00ab\u00a0doucin\u00a0\u00bb. \u00c0 moins d&rsquo;avoir des tendances suicidaires marqu\u00e9es et bien qu&rsquo;il soit proche du rivage, il est fortement d\u00e9conseill\u00e9 de rejoindre le site \u00e0 la nage, la circulation des bateaux \u00e9tant tr\u00e8s dense et les navigateurs ayant un fort penchant pour la chasse au plongeur\u2026<\/p>\n\n\n\n<p>Le navire est en relativement bon \u00e9tat, il repose \u00e0 plat sur sa quille sur un fond de sable gravillonneux dans la zone des 20m. La visite peut commencer par la proue qui est tr\u00e8s ab\u00eem\u00e9e, le haut de l&rsquo;\u00e9trave, d\u00e9coup\u00e9 en 1982 au cours d&rsquo;une campagne de la Marine Nationale, reposant \u00e0 l&rsquo;envers \u00e0 quelques m\u00e8tres sur tribord (bancs de tacauds). On se d\u00e9place vers l&rsquo;arri\u00e8re pour visiter la cale avant bien ajour\u00e9e et sans danger particulier. En sortant de la cale on trouve le guindeau et on peut alors suivre une des coursives b\u00e2bord ou tribord vers l&rsquo;arri\u00e8re. La plupart des postes sont accessibles (vides et envas\u00e9s) dans l&rsquo;un d&rsquo;eux on peut apercevoir le haut de la machine \u00e0 triple expansion. Sur l&rsquo;arri\u00e8re se trouve le treuil utilis\u00e9 pour le dragage des mines. On peut alors descendre le long de la poupe pour admirer le safran et l&rsquo;h\u00e9lice \u00e0 demi-ensabl\u00e9s. Apr\u00e8s le retour vers l&rsquo;avant le long de la coque, on peut suivre la cha\u00eene de mouillage et rechercher la perche et le \u00ab\u00a0bruiteur\u00a0\u00bb destin\u00e9 \u00e0 faire exploser les mines \u00ab\u00a0\u00e0 influence\u00a0\u00bb. De nombreux \u00ab\u00a0souvenirs\u00a0\u00bb sont diss\u00e9min\u00e9s sur l&rsquo;\u00e9pave et aux alentours : \u00e9tuis de cartouches anglaises et allemandes, cuillers, fourchettes et couteaux \u00ab\u00a0d&rsquo;\u00e9poque\u00a0\u00bb, etc\u2026 \ud83d\ude42<\/p>\n\n\n\n<p>En 1982, les plongeurs du Liseron ont proc\u00e9d\u00e9 \u00e0 l\u2019arasement du b\u00e2timent, <a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/liseron_of_0982.gif\" target=\"_blank\" rel=\"noreferrer noopener\">cf. l&rsquo;article du Ouest-France de l&rsquo;\u00e9poque<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"quelques-photos-et-video-1c6d15a8-1e65-4a8c-83ce-8812416b7a4c\"><span class=\"ez-toc-section\" id=\"Quelques_photos_et_video\"><\/span>Quelques photos et vid\u00e9o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"M4623 &quot;Ludwig Janssen&quot; - Jacques Le Lay\" width=\"900\" height=\"506\" src=\"https:\/\/www.youtube.com\/embed\/rWXBSbXfGYs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<p class=\"has-text-align-left\"><em><strong>Vid\u00e9o r\u00e9alis\u00e9e par Jacques Le Lay avec son aimable autorisation.<\/strong><\/em><\/p>\n\n\n\n<figure class=\"wp-block-gallery aligncenter has-nested-images columns-default has-hover-filter-aden wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex advgb-dyn-7fd151ba\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"413\" data-id=\"2260\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_01.jpg\" alt=\"\" class=\"wp-image-2260\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_01.jpg 550w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_01-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_01-150x113.jpg 150w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><figcaption class=\"wp-element-caption\">La coque colonis\u00e9e par les \u00e9ponges<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"413\" data-id=\"2261\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_02.jpg\" alt=\"\" class=\"wp-image-2261\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_02.jpg 550w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_02-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_02-150x113.jpg 150w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><figcaption class=\"wp-element-caption\">La cale avant<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"413\" data-id=\"2269\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_03.jpg\" alt=\"\" class=\"wp-image-2269\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_03.jpg 550w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_03-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_03-150x113.jpg 150w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><figcaption class=\"wp-element-caption\">Les tacauds sous l&rsquo;\u00e9trave<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" data-id=\"2259\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_yq.jpg\" alt=\"\" class=\"wp-image-2259\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_yq.jpg 640w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_yq-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_yq-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Lo\u00efc en s\u00e9ance photo sur l&rsquo;\u00e9pave<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"413\" data-id=\"2273\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_04.jpg\" alt=\"\" class=\"wp-image-2273\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_04.jpg 550w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_04-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_04-150x113.jpg 150w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><figcaption class=\"wp-element-caption\">Le safran<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"550\" height=\"413\" data-id=\"2263\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_05.jpg\" alt=\"\" class=\"wp-image-2263\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_05.jpg 550w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_05-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_05-150x113.jpg 150w\" sizes=\"auto, (max-width: 550px) 100vw, 550px\" \/><figcaption class=\"wp-element-caption\">Une coursive<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" data-id=\"2267\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_03.jpg\" alt=\"\" class=\"wp-image-2267\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_03.jpg 640w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_03-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_03-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Le pont avant et le treuil en arri\u00e8re-plan<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" data-id=\"2265\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_01.jpg\" alt=\"\" class=\"wp-image-2265\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_01.jpg 640w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_01-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_01-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Le safran et l&rsquo;h\u00e9lice<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"480\" data-id=\"2266\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_02.jpg\" alt=\"\" class=\"wp-image-2266\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_02.jpg 640w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_02-300x225.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_11_02_14_02-150x113.jpg 150w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">La coursive tribord<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\"><strong><em> Photos de l&rsquo;\u00e9pave (cr\u00e9dits H. Jacq &#8211; Y. Querrec) <\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-3 is-cropped has-filter-aden wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex advgb-dyn-9f469fb0\">\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_tribord.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"330\" data-id=\"2288\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_tribord.gif\" alt=\"\" class=\"wp-image-2288\"\/><\/a><figcaption class=\"wp-element-caption\">Vue tribord relev\u00e9 de 1947<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_compartimentage.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"524\" data-id=\"2290\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_compartimentage.gif\" alt=\"\" class=\"wp-image-2290\"\/><\/a><figcaption class=\"wp-element-caption\">Compartimentage relev\u00e9 de 1947<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_dessus.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"204\" data-id=\"2287\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/ludwig_janssen_dessus.gif\" alt=\"\" class=\"wp-image-2287\"\/><\/a><figcaption class=\"wp-element-caption\">Vue en plan relev\u00e9 de 1947<\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\"><strong><em>Plan de 1947<\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"un-peu-dhistoire-89f3c6a5-9e64-424f-b358-f3635f20c776\"><span class=\"ez-toc-section\" id=\"Un_peu_dhistoire\"><\/span>Un peu d&rsquo;histoire<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Le <em>Ludwig Janssen<\/em> \u00e9tait un chalutier \u00e0 vapeur de 56m de long lanc\u00e9 en septembre 1937 aux chantiers Deschimag-Seebeck \u00e0 Bremmerhaven et arm\u00e9 par la compagnie Ludwig Janssen &amp; co. R\u00e9quisitionn\u00e9 en 1939, il est affect\u00e9 \u00e0 la 12 MsFl (Minensuch Fottille &#8211; flottille de dragueurs de mines) sous le N\u00b0 <em>M1205<\/em> et op\u00e8re sur les c\u00f4tes hollandaises et en Mer du Nord. En 1942, apr\u00e8s la dissolution de cette unit\u00e9 il est transf\u00e9r\u00e9 \u00e0 la 46 MsFl de Saint-Malo sous le N\u00b0 <em>M4623,<\/em> indicatif radio Z H D, commandant : Oberleutnant zur See Mehlen.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 has-filter-aden wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex advgb-dyn-5199f55b\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"400\" data-id=\"2315\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1202_van_ronzelen.jpg\" alt=\"\" class=\"wp-image-2315\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1202_van_ronzelen.jpg 700w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1202_van_ronzelen-300x171.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1202_van_ronzelen-150x86.jpg 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\">Le M1202 Van Ronzelen lors de son passage \u00e0 la 12 MsFl <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"400\" data-id=\"2316\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1205_ludwig-janssen.jpg\" alt=\"\" class=\"wp-image-2316\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1205_ludwig-janssen.jpg 700w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1205_ludwig-janssen-300x171.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m1205_ludwig-janssen-150x86.jpg 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\">Le M1205 Ludwig Janssen \u00e0 la m\u00eame \u00e9poque\nReconnaissable au \u00ab\u00a0J\u00a0\u00bbde l&rsquo;armement Janssen sur la chemin\u00e9e <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"225\" data-id=\"2325\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/irene_ro8.jpg\" alt=\"\" class=\"wp-image-2325\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/irene_ro8.jpg 400w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/irene_ro8-300x169.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/irene_ro8-150x84.jpg 150w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><figcaption class=\"wp-element-caption\">Le cargo RO8<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full advgb-dyn-9a05de50\"><img loading=\"lazy\" decoding=\"async\" width=\"217\" height=\"200\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/12_msfll.gif\" alt=\"\" class=\"wp-image-2313\"\/><figcaption class=\"wp-element-caption\">Insigne de la 12 MsFl<\/figcaption><\/figure><\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full advgb-dyn-ba1b0cbb\"><img loading=\"lazy\" decoding=\"async\" width=\"135\" height=\"200\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/46_msfl.gif\" alt=\"\" class=\"wp-image-2314\"\/><figcaption class=\"wp-element-caption\">Insigne de la 46 MsFl<\/figcaption><\/figure><\/div><\/div>\n<\/div>\n\n\n\n<p>Le 22 mai 1944, un convoi compos\u00e9 des <em>M4621 &#8211; Van Ronzelen<\/em>, <em>M4623 &#8211; Ludwig Janssen, M4624 &#8211; Schlesien, M4626 &#8211; Ostfriesland<\/em> &#8211; et du cargo <em>RO8<\/em> quitte Saint-Malo pour Bordeaux. Ils naviguent de nuit pour \u00e9chapper aux avions alli\u00e9s, au petit matin du 23 mai, vers 6 heures, ils entrent dans l&#8217;embouchure du Trieux et mouillent sur le plan d&rsquo;eau des Perdrix. En fin d&rsquo;apr\u00e8s-midi, peu apr\u00e8s 18H00, huit <em>Typhoon IB<\/em> britanniques du squadron 263, bas\u00e9 \u00e0 Harrowbeer, escort\u00e9s par huit <em>Spitfire MK XIV<\/em> du squadron 610 bas\u00e9 lui \u00e0 Bolt Head, plongent sur les navires au mouillage. Le <em>M4623<\/em> est encadr\u00e9 par cinq ou six bombes, l&rsquo;une d&rsquo;elles explose sur b\u00e2bord arri\u00e8re au droit de la machine. Le navire coule lentement par l&rsquo;arri\u00e8re. L&rsquo;\u00e9quipage est rep\u00each\u00e9 par le <em>M4621<\/em>. On d\u00e9plore 2 bless\u00e9s graves et 2 l\u00e9gers. \u00c0 21H30 le convoi est de nouveau attaqu\u00e9 et le <em>M4621<\/em> touch\u00e9. Le commandement ordonne le retour vers Saint-Malo. Plus tard les Allemands enverront des scaphandriers r\u00e9cup\u00e9rer l&rsquo;armement et tout ce qui peut \u00eatre utile. Les anglais ne d\u00e9plorent aucune perte lors de l&rsquo;attaque malgr\u00e9 une DCA intense. En revanche, au retour sur Bolt Head, le train d&rsquo;atterrissage d&rsquo;un <em>Spifire<\/em> refuse de descendre. Apr\u00e8s plusieurs tentatives le pilote se d\u00e9cide \u00e0 tenter un atterrissage sur le ventre. Comme souvent dans ce cas, le r\u00e9servoir ventral explose lors de la glissade. Le Flight Lieutenant Ronald West meurt de ses br\u00fblures dans la nuit, l&rsquo;enqu\u00eate ne pourra d\u00e9terminer si la panne de train d&rsquo;atterrissage est due \u00e0 la DCA. En 1947 l&rsquo;\u00e9pave du <em>M4623<\/em> sera inspect\u00e9e par la Marine Nationale mais le projet de renflouage sera abandonn\u00e9 (<a rel=\"noreferrer noopener\" href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/rapport_lj.pdf\" target=\"_blank\">rapport d&rsquo;\u00e9valuation<\/a>). On se contentera de d\u00e9truire la partie sup\u00e9rieure de l&rsquo;\u00e9pave (chemin\u00e9e, passerelle etc&#8230;) afin qu&rsquo;elle ne soit pas un danger pour la navigation. <a href=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/liseron_of_0982.gif\">Le travail de d\u00e9molition sera achev\u00e9 en 1982 lors de 2 campagnes du groupement de plongeurs d\u00e9mineurs de Brest<\/a>. Apr\u00e8s la guerre les <em>M4621<\/em> et <em>M4626<\/em> seront utilis\u00e9s comme b\u00e2timents hydrographiques par la Marine Nationale sous les immatriculations respectives <em>P660 &#8211; Alidade<\/em> et <em>P661 &#8211; Octant<\/em> jusqu&rsquo;en 1960 pour le premier et 1959 pour le deuxi\u00e8me. Contrairement \u00e0 ce que pensait le scaphandrier qui a r\u00e9alis\u00e9 l&rsquo;\u00e9valuation d&rsquo;avril 1947, les chalutiers de cette s\u00e9rie chauffaient au charbon, la r\u00e9serve \u00e9tait de 260 tonnes.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex advgb-dyn-a2479a4a\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"484\" data-id=\"2331\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueurs_44_05_23.jpg\" alt=\"\" class=\"wp-image-2331\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueurs_44_05_23.jpg 768w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueurs_44_05_23-300x189.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueurs_44_05_23-150x95.jpg 150w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><figcaption class=\"wp-element-caption\">Dragueurs de la 46 MsFl sur le plan d&rsquo;eau des Perdrix \u00e0 L\u00e9zardrieux <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"420\" data-id=\"2330\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueur_lezardrieux.jpg\" alt=\"\" class=\"wp-image-2330\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueur_lezardrieux.jpg 700w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueur_lezardrieux-300x180.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/dragueur_lezardrieux-150x90.jpg 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\">Dragueur de la 46 MsFl au mouillage \u00e0 L\u00e9zardrieux<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"381\" data-id=\"2332\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/44_05_23_attaque.jpg\" alt=\"\" class=\"wp-image-2332\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/44_05_23_attaque.jpg 600w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/44_05_23_attaque-300x191.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/44_05_23_attaque-150x95.jpg 150w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">Attaque du 23 mai 1944, une bombe explose pr\u00e8s du cargo RO 8<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"365\" data-id=\"2333\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/m4623_la_fin.jpg\" alt=\"\" class=\"wp-image-2333\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/m4623_la_fin.jpg 700w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/m4623_la_fin-300x156.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/m4623_la_fin-150x78.jpg 150w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><figcaption class=\"wp-element-caption\">Fin du M4623 Ludwig Janssen, la proue est encore hors de l&rsquo;eau <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"388\" data-id=\"2334\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn.jpg\" alt=\"\" class=\"wp-image-2334\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-232x300.jpg 232w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-116x150.jpg 116w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption class=\"wp-element-caption\">Insigne du 610 sqdn<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"919\" height=\"1024\" data-id=\"2335\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12-919x1024.jpg\" alt=\"\" class=\"wp-image-2335\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12-919x1024.jpg 919w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12-269x300.jpg 269w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12-768x856.jpg 768w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12-135x150.jpg 135w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/pa_07_09_12.jpg 1100w\" sizes=\"auto, (max-width: 919px) 100vw, 919px\" \/><figcaption class=\"wp-element-caption\">Article paru dans la Presse d&rsquo;Armor le 12 09 07 d&rsquo;apr\u00e8s les recherches d&rsquo;Yvon Herv\u00e9 <\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"799\" height=\"552\" data-id=\"2336\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-1.jpg\" alt=\"\" class=\"wp-image-2336\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-1.jpg 799w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-1-300x207.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-1-768x531.jpg 768w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-1-150x104.jpg 150w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><figcaption class=\"wp-element-caption\">Formation de Spitfire Mk XIV du 610 sqdn en 1944<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"273\" data-id=\"2337\" src=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-profile.jpg\" alt=\"\" class=\"wp-image-2337\" srcset=\"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-profile.jpg 720w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-profile-300x114.jpg 300w, https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/12\/610sqn-profile-150x57.jpg 150w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Profile du Spitfire Mk XIV du Squadron Leader Newberry commandant le 610 sqdn en 1944 <\/figcaption><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\"><strong><em>L&rsquo;attaque&#8230;<\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"un-peu-dhistoire-89f3c6a5-9e64-424f-b358-f3635f20c776\"><span class=\"ez-toc-section\" id=\"References\"><\/span>R\u00e9f\u00e9rences<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><strong>Texte et composition de la page : <\/strong>Roger Poitevin (D\u00e9cembre 2010)<strong><br \/>Sources<\/strong> : Oc\u00e9ans Hors-s\u00e9rie \u00e9paves N\u00b03 &#8211; Ouest France &#8211; La Presse d&rsquo;Armor \u00ab\u00a0Raids a\u00e9riens sur la Bretagne durant la seconde guerre mondiale\u00a0\u00bb R. Bohn J. Ilias<br \/><strong>Informations historiques<\/strong> : Yvon Herv\u00e9<br \/><strong>Documents presse<\/strong> : Alain Violas &#8211; Photos de L\u00e9zardrieux durant la guerre &#8211; collection priv\u00e9e Yvon Herv\u00e9 <br \/><strong>Illustration<\/strong> : Olivier Brichet &#8211; reproduction interdite<br \/><strong>Photos sous-marines<\/strong> : GISSaCG\/Henri Jacq &amp; Yann Querrec &#8211; reproduction interdite<br \/><strong>Vid\u00e9o<\/strong> : Jacques Le Lay &#8211; reproduction interdite<br \/><strong>Les sites<\/strong> <a href=\"http:\/\/www.raf.mod.uk\/history\/\" target=\"_blank\" rel=\"noopener\">\u00ab\u00a0The Royal Air Force &#8211; History section\u00a0\u00bb<\/a>, \u00a0<a href=\"http:\/\/www.rafweb.org\/Index.htm\" target=\"_blank\" rel=\"noopener\">\u00ab\u00a0Royal Air Force organisational history\u00a0\u00bb<\/a>, <a href=\"http:\/\/www.610squadron.com\/\" target=\"_blank\" rel=\"noopener\">N\u00b0610 (county of Chester) Squadron<\/a> \u00a0pour les illustrations du 610 Squadron, <a href=\"http:\/\/archeosousmarine.net\/\" target=\"_blank\" rel=\"noopener\">l&rsquo;Association Ariane Andromaque<\/a> avec Bernard de Maisonneuve et Claude Rabault,<a href=\"http:\/\/www.absa39-45.asso.fr\/accueil_bretagne.html\" target=\"_blank\" rel=\"noopener\">l&rsquo;association bretonne du souvenir a\u00e9rien<\/a>, <a href=\"http:\/\/www.miramarshipindex.org.nz\/\" target=\"_blank\" rel=\"noopener\">Miramar ship index<\/a> , le site de Peter M\u00fcller sur <a href=\"http:\/\/werften.fischtown.de\/archiv\/ludwigjanssen.html\" target=\"_blank\" rel=\"noopener\">les chantiers navals de Bremmerhaven<\/a> , le site <a href=\"http:\/\/www.navypedia.org\/index.htm\" target=\"_top\" rel=\"noopener\">Navypedia<\/a> pour les images du M1202 et du M1205 <br \/>et l&rsquo;aide pr\u00e9cieuse de Christophe Moriceau de <a href=\"http:\/\/perso.orange.fr\/scyllias\/\" target=\"_blank\" rel=\"noopener\">l&rsquo;exp\u00e9dition Scyllias<\/a><\/p>\n\n\n\n<p><span style=\"color: #0033cc; font-size: xx-small;\">(MAJ d\u00e9cembre 2022 &#8211; Webmestre GISSaCG)<\/span><\/p>\n\n\n[xyz-ips snippet=\u00a0\u00bbTestNextPrevious\u00a0\u00bb]\n\n\n\n<p><span style=\"color: #0033cc; font-size: xx-small;\">(MAJ d\u00e9cembre 2022 &#8211; Webmestre GISSaCG)<\/span><\/p>\n<p><!--nextpage--><\/p>\n<p>toto<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La plong\u00e9e SHOM \u00e9pave N\u00b0 14583029 &#8211; Position GPS (sous r\u00e9serves, non v\u00e9rifi\u00e9) 48\u00b047&rsquo;916 N &#8211; 3\u00b005&rsquo;680 W (WGS84) &#8211; Carte SHOM 7127 Il s&rsquo;agit de l&rsquo;\u00e9pave d&rsquo;un chalutier arm\u00e9 utilis\u00e9 comme dragueur de mines par la Kriegsmarine pendant la derni\u00e8re guerre (voir le petit point historique sous les photos)&#8230;.<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/gissacg.fr\/index.php\/les-epaves-du-tregor\/epave-513-le-m4623-ludwig-janssen\/\">Lire la suite<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":2190,"parent":2301,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"wpm_timeformat":"","_wpm_styles":"","advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":""},"class_list":["post-2223","page","type-page","status-publish","has-post-thumbnail","hentry"],"coauthors":[],"author_meta":{"author_link":"https:\/\/gissacg.fr\/index.php\/author\/admin\/","display_name":"Webmaster GISSaCG"},"relative_dates":{"created":"Publi\u00e9 3 ans il y a","modified":"Mis \u00e0 jour 3 ans il y a"},"absolute_dates":{"created":"Publi\u00e9 le 17 novembre 2022","modified":"Mise \u00e0 jour le 20 d\u00e9cembre 2022"},"absolute_dates_time":{"created":"Publi\u00e9 le 17 novembre 2022 13 h 49 min","modified":"Mise \u00e0 jour le 20 d\u00e9cembre 2022 20 h 42 min"},"featured_img_caption":"","featured_img":"https:\/\/gissacg.fr\/wp-content\/uploads\/2022\/11\/m4623_ob_v-150x114.jpg","series_order":"","_links":{"self":[{"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/pages\/2223","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/comments?post=2223"}],"version-history":[{"count":62,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/pages\/2223\/revisions"}],"predecessor-version":[{"id":2455,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/pages\/2223\/revisions\/2455"}],"up":[{"embeddable":true,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/pages\/2301"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/media\/2190"}],"wp:attachment":[{"href":"https:\/\/gissacg.fr\/index.php\/wp-json\/wp\/v2\/media?parent=2223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}