{"id":9256,"date":"2026-10-23T22:42:57","date_gmt":"2026-10-23T15:42:57","guid":{"rendered":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/"},"modified":"2026-10-24T00:38:05","modified_gmt":"2026-10-23T17:38:05","slug":"dive-planning-gas-computers","status":"publish","type":"page","link":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/","title":{"rendered":"Dive Planning: Breathing Gas, Computers and Buddy Limits"},"content":{"rendered":"<nav class=\"cb-site-nav\" aria-label=\"Main navigation\"><div class=\"cb-nav-wrap\"><a class=\"cb-nav-logo\" href=\"https:\/\/copperbandscuba.com\/\" aria-label=\"Copperband home\"><img loading=\"lazy\" decoding=\"async\" width=\"112\" height=\"100\" src=\"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2024\/07\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1-300x266.png\" alt=\"Copperband Scuba Academy\"><\/a><button class=\"cb-nav-toggle\" type=\"button\" aria-expanded=\"false\" aria-controls=\"cb-review-menu\">Menu<\/button><div class=\"cb-nav-items\" id=\"cb-review-menu\"><a href=\"https:\/\/copperbandscuba.com\/\">Home<\/a><a href=\"https:\/\/copperbandscuba.com\/index.php\/try-scuba-diving\/\">Diving<\/a><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/\">PADI courses<\/a><a href=\"https:\/\/copperbandscuba.com\/index.php\/shop\/\">Equipment Shop<\/a><a href=\"https:\/\/copperbandscuba.com\/index.php\/pattaya-dive-sites\/\">Dive sites<\/a><a href=\"https:\/\/copperbandscuba.com\/index.php\/contact-us\/\">Contact &amp; location<\/a><a class=\"cb-education-link\" href=\"https:\/\/copperbandscuba.com\/index.php\/education-hub\/\">Education Hub<\/a><a class=\"cb-nav-book\" href=\"https:\/\/copperbandscuba.com\/#booking-enquiry\">Book your dive<\/a><\/div><\/div><\/nav>\n\n<div class=\"edu\"><header class=\"edu-hero\"><div class=\"edu-wrap\"><nav aria-label=\"Breadcrumb\"><a href=\"https:\/\/copperbandscuba.com\/\">Home<\/a> \/ <a href=\"https:\/\/copperbandscuba.com\/index.php\/education-hub\/\">Education Hub<\/a> \/ Open Water divers<\/nav><p class=\"edu-kicker\">Open Water divers \u00b7 Lesson 04<\/p><h1>Dive Planning: Breathing Gas, Computers and Buddy Limits<\/h1><p class=\"edu-lead\">A dive ends when the first relevant limit is reached. Gas, decompression status, conditions and personal comfort are separate limits; one reassuring number cannot cancel the others.<\/p><p class=\"edu-byline\">Copperband Scuba Academy \u00b7 Educational guide \u00b7 Published 23 October 2026<\/p><\/div><\/header><article class=\"edu-reading\"><aside class=\"edu-notice\" aria-label=\"Educational disclaimer\"><strong>Educational information only.<\/strong> This information does not replace official training, practical instruction or certification through a recognised scuba diving organisation such as PADI. Always dive within your qualifications, experience and current conditions.<\/aside><div class=\"edu-visual-slot\"><section class=\"edu-visuals\" id=\"learning-sheet\" aria-labelledby=\"learning-sheet-title\"><header class=\"edu-sheet-heading\"><div><p class=\"edu-kicker\">Copperband learning sheet<\/p><h2 id=\"learning-sheet-title\">The first limit ends the dive<\/h2><\/div><button type=\"button\" class=\"edu-print-sheet\">Print learning sheet<\/button><\/header><p class=\"edu-visual-intro\">Four independent constraints. Every one matters.<\/p><figure class=\"edu-infographic\"><div class=\"edu-svg-wrap\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 780 365\" role=\"img\" aria-labelledby=\"visual-title-planning visual-desc-planning\"><title id=\"visual-title-planning\">The first limit ends the dive<\/title><desc id=\"visual-desc-planning\">Four independent constraints. Every one matters. Breathing gas: Available supply and reserve. Computer \/ profile: Agreed no-stop and ascent limits. Conditions: Route, current and exit. People: Comfort, warmth and readiness<\/desc><defs><marker id=\"arrow-planning\" markerWidth=\"8\" markerHeight=\"8\" refX=\"6\" refY=\"3\" orient=\"auto\"><path d=\"M0,0 L0,6 L6,3Z\" fill=\"#e7b545\"\/><\/marker><\/defs><rect width=\"780\" height=\"365\" rx=\"14\" fill=\"#16272b\"\/><rect x=\"24\" y=\"30\" width=\"170\" height=\"223\" rx=\"14\" fill=\"#23383c\" stroke=\"#537176\"\/><circle cx=\"109\" cy=\"99\" r=\"42\" fill=\"#16292d\" stroke=\"#e7b545\" stroke-width=\"2\"\/><path d=\"M109 99L135 71\" stroke=\"#e7b545\" stroke-width=\"4\"\/><text x=\"109\" y=\"168\" fill=\"#fff\" font-size=\"19\" font-family=\"Arial,sans-serif\" text-anchor=\"middle\">Breathing gas<\/text><text x=\"38\" y=\"199\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">Available supply<\/text><text x=\"38\" y=\"223\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">and reserve<\/text><rect x=\"210\" y=\"30\" width=\"170\" height=\"223\" rx=\"14\" fill=\"#23383c\" stroke=\"#537176\"\/><circle cx=\"295\" cy=\"99\" r=\"42\" fill=\"#16292d\" stroke=\"#e7b545\" stroke-width=\"2\"\/><path d=\"M295 99L321 83\" stroke=\"#e7b545\" stroke-width=\"4\"\/><text x=\"295\" y=\"168\" fill=\"#fff\" font-size=\"19\" font-family=\"Arial,sans-serif\" text-anchor=\"middle\">Computer<\/text><text x=\"224\" y=\"199\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">Agreed no-stop and<\/text><text x=\"224\" y=\"223\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">ascent limits<\/text><rect x=\"396\" y=\"30\" width=\"170\" height=\"223\" rx=\"14\" fill=\"#23383c\" stroke=\"#537176\"\/><circle cx=\"481\" cy=\"99\" r=\"42\" fill=\"#16292d\" stroke=\"#e7b545\" stroke-width=\"2\"\/><path d=\"M481 99L507 108\" stroke=\"#e7b545\" stroke-width=\"4\"\/><text x=\"481\" y=\"168\" fill=\"#fff\" font-size=\"19\" font-family=\"Arial,sans-serif\" text-anchor=\"middle\">Conditions<\/text><text x=\"410\" y=\"199\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">Route, current and<\/text><text x=\"410\" y=\"223\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">exit<\/text><rect x=\"582\" y=\"30\" width=\"170\" height=\"223\" rx=\"14\" fill=\"#23383c\" stroke=\"#537176\"\/><circle cx=\"667\" cy=\"99\" r=\"42\" fill=\"#16292d\" stroke=\"#e7b545\" stroke-width=\"2\"\/><path d=\"M667 99L693 124\" stroke=\"#e7b545\" stroke-width=\"4\"\/><text x=\"667\" y=\"168\" fill=\"#fff\" font-size=\"19\" font-family=\"Arial,sans-serif\" text-anchor=\"middle\">People<\/text><text x=\"596\" y=\"199\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">Comfort, warmth<\/text><text x=\"596\" y=\"223\" fill=\"#d6e0dd\" font-size=\"16\" font-family=\"Arial,sans-serif\" text-anchor=\"start\">and readiness<\/text><rect x=\"24\" y=\"275\" width=\"728\" height=\"55\" rx=\"14\" fill=\"#3c3524\" stroke=\"#e7b545\"\/><text x=\"388\" y=\"311\" fill=\"#f7e6b3\" font-size=\"19\" font-family=\"Arial,sans-serif\" text-anchor=\"middle\">FIRST LIMIT REACHED \u2192 FOLLOW THE AGREED END \/ RETURN PLAN<\/text><\/svg><\/div><figcaption>Breathing gas: Available supply and reserve \u2022 Computer \/ profile: Agreed no-stop and ascent limits \u2022 Conditions: Route, current and exit \u2022 People: Comfort, warmth and readiness.<\/figcaption><\/figure><div class=\"edu-logic-sheet\"><h3>Logic sheet: connect the idea with the decision<\/h3><p>Use these prompts to check your understanding before discussing practical decisions with your instructor.<\/p><div class=\"edu-logic-grid\"><div class=\"edu-logic-row\"><div class=\"edu-logic-context\"><span class=\"edu-logic-number\">01<\/span><strong>Before diving<\/strong><\/div><div><span class=\"edu-cell-label\">Consider<\/span>Route, gas decisions, buddy procedures and exit agreed?<\/div><div><span class=\"edu-cell-label\">Next step<\/span>Clarify the plan before entering.<\/div><\/div><div class=\"edu-logic-row\"><div class=\"edu-logic-context\"><span class=\"edu-logic-number\">02<\/span><strong>Gas limit reached<\/strong><\/div><div><span class=\"edu-cell-label\">Consider<\/span>Computer still shows no-stop time?<\/div><div><span class=\"edu-cell-label\">Next step<\/span>Follow the gas turnaround or ascent plan anyway.<\/div><\/div><div class=\"edu-logic-row\"><div class=\"edu-logic-context\"><span class=\"edu-logic-number\">03<\/span><strong>Profile limit reached<\/strong><\/div><div><span class=\"edu-cell-label\">Consider<\/span>Plenty of gas remains?<\/div><div><span class=\"edu-cell-label\">Next step<\/span>Gas does not cancel decompression or training limits.<\/div><\/div><div class=\"edu-logic-row\"><div class=\"edu-logic-context\"><span class=\"edu-logic-number\">04<\/span><strong>A diver is uncomfortable<\/strong><\/div><div><span class=\"edu-cell-label\">Consider<\/span>Numbers still look reassuring?<\/div><div><span class=\"edu-cell-label\">Next step<\/span>Communicate and finish or change the dive as trained.<\/div><\/div><\/div><\/div><p class=\"edu-takeaway\"><strong>Remember:<\/strong> No-stop time is not a promise of remaining dive time. Gas, people and conditions can end the dive earlier.<\/p><p class=\"edu-sheet-disclaimer\"><strong>Educational information only.<\/strong> This sheet does not replace official training, practical instruction or certification through a recognised scuba diving organisation such as PADI. It is not an emergency protocol, personal medical assessment or technical dive plan.<\/p><\/section><\/div><nav class=\"edu-toc\" aria-label=\"Lesson contents\"><strong>In this lesson<\/strong><ul><li><a href=\"#learning-sheet\">Infographic and logic sheet<\/a><\/li><li><a href=\"#topic-0\">Agree the plan before entering<\/a><\/li><li><a href=\"#topic-1\">Pressure readings are not the whole gas supply<\/a><\/li><li><a href=\"#topic-2\">What a computer can and cannot tell you<\/a><\/li><li><a href=\"#deeper\">Learn more: two independent clocks<\/a><\/li><li><a href=\"#self-check\">Check your understanding<\/a><\/li><\/ul><\/nav><section id=\"topic-0\"><h2>Agree the plan before entering<\/h2><p>Discuss the intended route, depth, time, gas checks, turnaround decisions, ascent and separation procedure. Check equipment together using your training and the operator\u2019s briefing. Tell the guide about recent experience, unfamiliar equipment and anything affecting your comfort.<\/p><p>A plan should reflect the people actually diving. Two buddies may have different cylinder capacities, consumption, computer settings and experience. The agreed route must remain suitable for both, with enough gas for the ascent and foreseeable problems.<\/p><\/section><section id=\"topic-1\"><h2>Pressure readings are not the whole gas supply<\/h2><p>A gauge shows cylinder pressure. How much usable breathing gas that represents also depends on cylinder size and the available supply. A larger cylinder and a smaller cylinder at the same pressure do not contain the same quantity of gas.<\/p><p>Gas use rises with ambient pressure and can rise with exertion or stress. A reserve is not extra sightseeing time. Ask your instructor or guide to explain the gas plan for the specific depth, cylinder, team and route; a universal pressure copied from an article is not adequate planning.<\/p><\/section><section id=\"topic-2\"><h2>What a computer can and cannot tell you<\/h2><p>A dive computer uses depth and time, breathing-gas settings and a mathematical model to estimate decompression status. Learn your own model\u2019s display, ascent warnings, no-stop information and settings before the dive. Air integration, if present, is an additional feature; many computers do not measure cylinder gas.<\/p><p>No-stop time is not the time you can necessarily stay underwater. You may need to finish earlier for gas, conditions, cold or the buddy\u2019s limit. A computer also does not measure every physiological factor and cannot guarantee freedom from decompression illness.<\/p><\/section><section class=\"edu-deeper\" id=\"deeper\"><p class=\"edu-kicker\">Go a little deeper<\/p><h2>two independent clocks<\/h2><p>Imagine that your computer still shows no-stop time but your planned gas turnaround has been reached. The gas limit governs the decision to return or ascend as planned. Conversely, a generous gas supply does not justify exceeding the agreed decompression or qualification limits. Treat the plan as a set of independent constraints, then follow the first one reached. After the dive, logging depth, conditions and consumption helps your instructor identify useful improvements.<\/p><\/section><section id=\"self-check\" class=\"edu-check\"><h2>Check your understanding<\/h2><h3>Can I follow my buddy\u2019s computer instead of using my own?<\/h3><p>Your decompression information must reflect your own dive history and the procedures taught in your training. Discuss missing or unfamiliar equipment before diving; a buddy\u2019s different profile is not automatically yours.<\/p><\/section><section><h2>Connect theory with training<\/h2><ul><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/open-water-course\/\">Open Water planning skills<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/fun-dives\/\">Certified fun dives in Pattaya<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/enriched-air-nitrox\/\">Enriched Air Nitrox training<\/a><\/li><\/ul><p>For a Pattaya trip, tell the team your qualification, last-dive date and learning goals so the practical programme can be matched to you.<\/p><\/section><nav class=\"edu-next\" aria-label=\"Continue learning\"><h2>Continue learning<\/h2><ul><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/daltons-henrys-laws-diving\/\">Dalton\u2019s and Henry\u2019s Laws: Breathing Gases and Decompression<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/scuba-buoyancy-trim-theory\/\">Scuba Buoyancy and Trim: Why Divers Rise or Sink<\/a><\/li><\/ul><a href=\"https:\/\/copperbandscuba.com\/index.php\/education-hub\/#open-water-divers\">Back to Open Water divers<\/a><\/nav><section class=\"edu-sources\"><h2>Sources and further reading<\/h2><ul><li><a href=\"https:\/\/dan.org\/health-medicine\/health-resource\/smart-guides\/13-ways-to-run-out-of-air-how-not-to\/safety-tips-to-prevent-out-of-air-emergencies\/\" rel=\"noopener\" target=\"_blank\">DAN: preventing out-of-air emergencies<\/a><\/li><li><a href=\"https:\/\/dan.org\/health-medicine\/health-resource\/dive-medical-reference-books\/decompression-sickness\/use-of-dive-computers\/\" rel=\"noopener\" target=\"_blank\">DAN: effective use of dive computers<\/a><\/li><\/ul><p>This is an independently written educational guide, not an official PADI course manual or certification assessment. Ask your instructor about unclear concepts before applying them in the water.<\/p><\/section><aside class=\"edu-notice\" aria-label=\"Educational disclaimer\"><strong>Educational information only.<\/strong> This information does not replace official training, practical instruction or certification through a recognised scuba diving organisation such as PADI. Always dive within your qualifications, experience and current conditions.<\/aside><\/article><\/div>\n<footer class=\"cb-site-footer\"><div class=\"cb-site-wrap\"><div class=\"cb-footer-grid\"><div><div class=\"cb-footer-brands\"><a class=\"cb-footer-logo\" href=\"https:\/\/copperbandscuba.com\/\" aria-label=\"Copperband Scuba Academy home\"><img decoding=\"async\" width=\"130\" height=\"115\" src=\"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2024\/07\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1.png\" alt=\"Copperband Scuba Academy logo\" loading=\"lazy\"><\/a><a class=\"cb-padi-logo\" href=\"https:\/\/www.padi.com\/\" aria-label=\"Visit PADI\"><img decoding=\"async\" width=\"314\" height=\"109\" src=\"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2025\/02\/377e84c3-06a1-4d2c-9133-fd9614e10471.png\" alt=\"PADI logo\" loading=\"lazy\"><img decoding=\"async\" class=\"cb-padi-word-white\" width=\"314\" height=\"109\" src=\"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2025\/02\/377e84c3-06a1-4d2c-9133-fd9614e10471.png\" alt=\"\" aria-hidden=\"true\" loading=\"lazy\"><\/a><\/div><h2>Copperband Scuba Academy<\/h2><p>Scuba diving, PADI courses and equipment sales in Pattaya.<\/p><p>Dragon House \u00b7 333\/107 Paniad Chang Road, Moo 9, Pattaya, Thailand<\/p><nav class=\"cb-contact-actions\" aria-label=\"Contact Copperband\"><a class=\"cb-contact-button\" href=\"tel:+66632050552\" aria-label=\"Call Copperband on +66 63 205 0552\"><svg viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M6.6 10.8a15.7 15.7 0 0 0 6.6 6.6l2.2-2.2c.3-.3.7-.4 1.1-.2 1.2.4 2.5.6 3.8.6.6 0 1 .4 1 1V20c0 .6-.4 1-1 1C10.7 21 3 13.3 3 3.7c0-.6.4-1 1-1h3.5c.6 0 1 .4 1 1 0 1.3.2 2.6.6 3.8.1.4 0 .8-.3 1.1z\"\/><\/svg><span>Call +66 63 205 0552<\/span><\/a><a class=\"cb-contact-button cb-whatsapp\" href=\"https:\/\/wa.me\/66632050552\" target=\"_blank\" rel=\"noopener\" aria-label=\"Chat with Copperband on WhatsApp\"><svg viewBox=\"0 0 24 24\" aria-hidden=\"true\"><path fill=\"currentColor\" d=\"M12 2a10 10 0 0 0-8.7 15L2 22l5.1-1.3A10 10 0 1 0 12 2zm0 18a8 8 0 0 1-4.1-1.1l-.4-.2-3 .8.8-3-.3-.4A8 8 0 1 1 12 20zm4.4-6c-.2-.1-1.4-.7-1.6-.8-.2-.1-.4-.1-.6.2l-.7.9c-.1.2-.3.2-.5.1-1.7-.8-2.8-2-3.4-3.2-.1-.2 0-.4.1-.5l.5-.6c.1-.2.2-.4.1-.6l-.7-1.7c-.2-.5-.4-.4-.6-.4h-.5c-.2 0-.4.1-.6.3-.6.6-.9 1.3-.9 2.1 0 1.3.9 2.6 1.1 2.8.1.2 1.9 3 4.6 4.1 1.7.7 2.4.7 3.3.4.6-.2 1.4-.8 1.6-1.5.2-.7.2-1.3.1-1.4-.1-.1-.3-.2-.5-.3z\"\/><\/svg><span>WhatsApp<\/span><\/a><a class=\"cb-contact-button cb-line\" href=\"https:\/\/line.me\/ti\/p\/W3AP5GuaPx\" target=\"_blank\" rel=\"noopener\" aria-label=\"Connect with Copperband on LINE\"><svg viewBox=\"0 0 32 32\" aria-hidden=\"true\"><rect width=\"32\" height=\"32\" rx=\"7\" fill=\"#06c755\"\/><path d=\"M27 14c0-5-5-9-11-9S5 9 5 14c0 4.4 4.2 8.1 9.8 8.8.4.1.9.3 1 .6.1.3.1.7 0 1l-.2 1.4c-.1.4-.3 1.5 1.3.8s8.3-4.9 9.7-8.4c.3-.7.4-1.4.4-2.2z\" fill=\"white\"\/><text x=\"16\" y=\"17\" text-anchor=\"middle\" font-family=\"Arial,sans-serif\" font-size=\"7\" font-weight=\"900\" fill=\"#06c755\">LINE<\/text><\/svg><span>LINE<\/span><\/a><\/nav><p><a href=\"mailto:dive@copperbandscuba.com\">dive@copperbandscuba.com<\/a><\/p><\/div><div><h2>Dive with us<\/h2><ul><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/shop\/\">Equipment Shop<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/try-scuba-diving\/\">Try scuba diving<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/fun-dives\/\">Certified fun dives<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/open-water-course\/\">PADI Open Water course<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/advanced-course\/\">PADI Advanced Open Water<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/fun-dive-packages\/\">Multi-day dive packages<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/snorkelling\/\">Snorkelling trips<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/services\/\">All diving &amp; courses<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/dragon-house-accommodation-pattaya\/\">Stay at Dragon House<\/a><\/li><\/ul><\/div><div><h2>Plan your visit<\/h2><ul><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/pattaya-dive-sites\/\">Dive sites &amp; guides<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/pattaya-diving-faq\/\">Diving FAQs<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/about-us\/\">About Copperband<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/contact-us\/\">Contact us<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/contact-us\/#copperband-map\">Our location in Pattaya<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/education-hub\/\">Education Hub<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/blog\/\">Dive journal<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/sitemap\/\">Website sitemap<\/a><\/li><li><a href=\"https:\/\/copperbandscuba.com\/index.php\/privacy-policy-2\/\">Privacy policy<\/a><\/li><\/ul><\/div><\/div><div class=\"cb-footer-bottom\"><span>\u00a9 2026 Copperband Scuba Academy<\/span><span>Pattaya, Thailand \u00b7 Diving & equipment<\/span><\/div><\/div><\/footer>\n","protected":false},"excerpt":{"rendered":"<p>A dive ends when the first relevant limit is reached. Gas, decompression status, conditions and personal comfort are separate limits; one reassuring number cannot cancel the others.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-9256","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Dive Planning, Gas and Computers | Copperband<\/title>\n<meta name=\"description\" content=\"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Dive Planning, Gas and Computers | Copperband\" \/>\n<meta property=\"og:description\" content=\"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/\" \/>\n<meta property=\"og:site_name\" content=\"Copperband Scuba Academy\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61561139056724\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-23T17:38:05+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2025\/08\/20250218_125339-scaled.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\n\t<meta property=\"og:image:height\" content=\"2560\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Dive Planning, Gas and Computers | Copperband\" \/>\n<meta name=\"twitter:description\" content=\"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/index.php\\\/dive-planning-gas-computers\\\/\",\"url\":\"https:\\\/\\\/copperbandscuba.com\\\/index.php\\\/dive-planning-gas-computers\\\/\",\"name\":\"Dive Planning, Gas and Computers | Copperband\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#website\"},\"datePublished\":\"2026-10-23T15:42:57+00:00\",\"dateModified\":\"2026-10-23T17:38:05+00:00\",\"description\":\"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/index.php\\\/dive-planning-gas-computers\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/copperbandscuba.com\\\/index.php\\\/dive-planning-gas-computers\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/index.php\\\/dive-planning-gas-computers\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/copperbandscuba.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Dive Planning: Breathing Gas, Computers and Buddy Limits\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#website\",\"url\":\"https:\\\/\\\/copperbandscuba.com\\\/\",\"name\":\"Copperband Scuba Academy - A Pattaya Dive Centre\",\"description\":\"PADI &amp; Raid Scuba Diving Pattaya\",\"publisher\":{\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#organization\"},\"alternateName\":\"Copperband Scuba\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/copperbandscuba.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#organization\",\"name\":\"Copperband Scuba Academy\",\"url\":\"https:\\\/\\\/copperbandscuba.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/copperbandscuba.com\\\/wp-content\\\/uploads\\\/2024\\\/07\\\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1.png\",\"contentUrl\":\"https:\\\/\\\/copperbandscuba.com\\\/wp-content\\\/uploads\\\/2024\\\/07\\\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1.png\",\"width\":800,\"height\":708,\"caption\":\"Copperband Scuba Academy\"},\"image\":{\"@id\":\"https:\\\/\\\/copperbandscuba.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/profile.php?id=61561139056724\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Dive Planning, Gas and Computers | Copperband","description":"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/","og_locale":"en_US","og_type":"article","og_title":"Dive Planning, Gas and Computers | Copperband","og_description":"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.","og_url":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/","og_site_name":"Copperband Scuba Academy","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61561139056724","article_modified_time":"2026-10-23T17:38:05+00:00","og_image":[{"width":1920,"height":2560,"url":"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2025\/08\/20250218_125339-scaled.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_title":"Dive Planning, Gas and Computers | Copperband","twitter_description":"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.","twitter_misc":{"Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/","url":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/","name":"Dive Planning, Gas and Computers | Copperband","isPartOf":{"@id":"https:\/\/copperbandscuba.com\/#website"},"datePublished":"2026-10-23T15:42:57+00:00","dateModified":"2026-10-23T17:38:05+00:00","description":"Learn how gas supply, no-stop limits, buddy planning and dive-computer information fit together before a recreational scuba dive.","breadcrumb":{"@id":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/copperbandscuba.com\/index.php\/dive-planning-gas-computers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/copperbandscuba.com\/"},{"@type":"ListItem","position":2,"name":"Dive Planning: Breathing Gas, Computers and Buddy Limits"}]},{"@type":"WebSite","@id":"https:\/\/copperbandscuba.com\/#website","url":"https:\/\/copperbandscuba.com\/","name":"Copperband Scuba Academy - A Pattaya Dive Centre","description":"PADI &amp; Raid Scuba Diving Pattaya","publisher":{"@id":"https:\/\/copperbandscuba.com\/#organization"},"alternateName":"Copperband Scuba","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/copperbandscuba.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/copperbandscuba.com\/#organization","name":"Copperband Scuba Academy","url":"https:\/\/copperbandscuba.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/copperbandscuba.com\/#\/schema\/logo\/image\/","url":"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2024\/07\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1.png","contentUrl":"https:\/\/copperbandscuba.com\/wp-content\/uploads\/2024\/07\/Copperband-logo-just-fish-curved-Dive-Centre-ORANGE-letter-1.png","width":800,"height":708,"caption":"Copperband Scuba Academy"},"image":{"@id":"https:\/\/copperbandscuba.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61561139056724"]}]}},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/pages\/9256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/comments?post=9256"}],"version-history":[{"count":1,"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/pages\/9256\/revisions"}],"predecessor-version":[{"id":9269,"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/pages\/9256\/revisions\/9269"}],"wp:attachment":[{"href":"https:\/\/copperbandscuba.com\/index.php\/wp-json\/wp\/v2\/media?parent=9256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}