{"id":7031,"date":"2020-05-21T12:56:47","date_gmt":"2020-05-21T12:56:47","guid":{"rendered":"http:\/\/www.max-sperling.bplaced.net\/?p=7031"},"modified":"2024-02-15T19:51:22","modified_gmt":"2024-02-15T19:51:22","slug":"oc-vs-ccr","status":"publish","type":"post","link":"http:\/\/www.max-sperling.bplaced.net\/?p=7031","title":{"rendered":"OC vs. CCR"},"content":{"rendered":"<p>With OC (Open Circuit) you are breathing the gas from the tank(s) just once, but with CCR (Closed Circuit Rebreather) your exhaled gas goes into a pendulum or a loop.<\/p>\n<hr>\n<p><strong>OC<\/strong><\/p>\n<pre>\r\n           Lungs\r\n           \u2191   \u2193\r\n     --- Mouthpiece ---\r\n           \u2191   \u21b3 Water\r\n      Gas cylinder\r\n<\/pre>\n<hr>\n<p><strong>CCR<\/strong><\/p>\n<p>Oxygen (Loop)<\/p>\n<pre>\r\n           Lungs\r\n           \u2191   \u2193\r\n     --- Mouthpiece ---\r\n         \u2193        \u2191\r\n    Scrubber    Counter-\r\n    canister ->  lung\r\n                   \u2191\r\n                Oxygen\r\n               cylinder\r\n<\/pre>\n<p>Mixed Gas (Loop)<\/p>\n<pre>\r\n           Lungs\r\n           \u2191   \u2193\r\n     --- Mouthpiece ---\r\n         \u2193        \u2191\r\n    Scrubber    Counter- <- Diluent\r\n    canister ->  lung       cylinder\r\n                   \u2191\r\n                Oxygen\r\n               cylinder\r\n<\/pre>\n<ul>\n<li>The scrubber removes the CO<sub>2<\/sub> from the exhaled breathing gas. (Prevents a CO<sub>2<\/sub> buildup.)<\/li>\n<li>Pendulum CCRs have a dead gas space in contrast to loop CCRs. (Like with a normal snorkel.)<\/li>\n<li>Many loop CCRs have two counterlungs, which are called exhale and inhale counterlung.<\/li>\n<\/ul>\n<hr>\n<p><strong>Comparison<\/strong><\/p>\n<table>\n<col style=\"width:20%\">\n<col style=\"width:40%\">\n<col style=\"width:40%\">\n<tr>\n<th>Variantion<\/th>\n<th>Advantages<\/th>\n<th>Disadvantages<\/th>\n<\/tr>\n<tr>\n<td>OC<\/td>\n<td>&#8211; Simple gear configuration<br \/>&#8211; Well known procedures<\/td>\n<td>&#8211; High gas costs<br \/>&#8211; Complicated gas logistics<\/td>\n<\/tr>\n<tr>\n<td>CCR<\/td>\n<td>&#8211; Less gas consumption<br \/>&#8211; Reduced deco time<\/td>\n<td>&#8211; Hugh initial costs<br \/>&#8211; Risk of CO<sub>2<\/sub> poisoning<\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>With OC (Open Circuit) you are breathing the gas from the tank(s) just once, but with CCR (Closed Circuit Rebreather)<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[20],"tags":[],"_links":{"self":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/7031"}],"collection":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7031"}],"version-history":[{"count":1,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/7031\/revisions"}],"predecessor-version":[{"id":16670,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=\/wp\/v2\/posts\/7031\/revisions\/16670"}],"wp:attachment":[{"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7031"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7031"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.max-sperling.bplaced.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7031"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}