{"id":61549,"date":"2025-11-19T17:31:25","date_gmt":"2025-11-19T09:31:25","guid":{"rendered":"https:\/\/www.sunhelmmarine.com\/?p=61549"},"modified":"2026-04-20T09:10:31","modified_gmt":"2026-04-20T09:10:31","slug":"the-impact-of-tides-on-the-ship-launching-of-marine-airbags","status":"publish","type":"post","link":"https:\/\/www.sunhelmmarine.com\/id\/the-impact-of-tides-on-the-ship-launching-of-marine-airbags\/","title":{"rendered":"Dampak Pasang Surut pada Peluncuran Kantung Udara Laut di Kapal"},"content":{"rendered":"\n<p>Launching a ship with <strong>marine airbags<\/strong> is one of the most flexible and cost-effective methods used by modern shipyards. <a href=\"https:\/\/www.sunhelmmarine.com\/marine-airbags\/ship-launching-airbag\/\">Ship launching airbags<\/a> can work on different shorelines, help heavy vessels slide safely, and reduce the need for complex slipways or dry docks.<br>However, one natural factor always shapes the success of ship launching using airbags: <strong>tides<\/strong>.<\/p>\n\n\n\n<p>Tides change the water depth, the flow speed, and sometimes even the ship\u2019s final landing position. Understanding how tides work, how to read tide tables, and how to choose the right launching moment is essential for every shipyard.<\/p>\n\n\n\n<p>This article explains tides in simple language and shows how they influence the entire airbag launching process.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-1-what-are-tides-and-how-do-they-work\"><strong>1. What Are Tides and How Do They Work?<\/strong><\/h2>\n\n\n\n<p>Tides are the <strong>periodic rise and fall of sea levels<\/strong> caused by the gravitational pull of the moon and the sun. During each tidal cycle:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>When the sea surface reaches the highest level \u2192 <strong>High tide<\/strong><\/li>\n\n\n\n<li>When it drops to the lowest \u2192 <strong>Low tide<\/strong><\/li>\n\n\n\n<li>The rising process \u2192 <strong>Flood tide<\/strong><\/li>\n\n\n\n<li>The falling process \u2192 <strong>Ebb tide<\/strong><\/li>\n\n\n\n<li>The height difference between high and low tide \u2192 <strong>Tidal range<\/strong><\/li>\n<\/ul>\n\n\n\n<p>The time from low tide to high tide is the flood tide duration, and from high tide to low tide is the ebb tide duration.<\/p>\n\n\n\n<p>These changing water levels directly affect the water depth available during a launch, which is why shipyards must treat tides seriously.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-2-main-types-of-tides\"><strong>2. Main Types of Tides<\/strong><\/h2>\n\n\n\n<p>Tides do not behave the same in all regions. They fall into three main types:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-semi-diurnal-tides\"><strong>Semi-diurnal tides<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Two high tides and two low tides per solar day<\/li>\n\n\n\n<li>Tide heights are almost equal<\/li>\n\n\n\n<li>Common in many places in the Bohai Sea, Yellow Sea, and East China Sea<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-diurnal-tides\"><strong>Diurnal tides<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One high tide and one low tide per day<\/li>\n\n\n\n<li>Typical in areas like the Beibu Gulf<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mixed-tides\"><strong>Mixed tides<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sometimes two tides per day, sometimes one<\/li>\n\n\n\n<li>Tide ranges vary greatly<\/li>\n\n\n\n<li>Common in many southern Chinese ports<\/li>\n<\/ul>\n\n\n\n<p>On the lunar calendar:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Around day 1 and 15 \u2192 <strong>Spring tides<\/strong> (largest tidal range)<\/li>\n\n\n\n<li>Around day 8 and 23 \u2192 <strong>Neap tides<\/strong> (smallest tidal range)<\/li>\n<\/ul>\n\n\n\n<p>These patterns determine how many available \u201claunching windows\u201d a shipyard gets each day.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-3-tide-tables-and-why-shipyards-must-use-them\"><strong>3. Tide Tables and Why Shipyards Must Use Them<\/strong><\/h2>\n\n\n\n<p>A tide table is a <strong>long-term prediction chart<\/strong> that shows expected high tide and low tide times and heights for each day. Tide tables are used in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Navigation<\/li>\n\n\n\n<li>Port construction<\/li>\n\n\n\n<li>Military operations<\/li>\n\n\n\n<li>Environmental monitoring<\/li>\n\n\n\n<li><strong>Shipbuilding and ship launching<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Shipyards rely on tide tables to plan the right hour for launching. By checking predicted water levels for the coming year, engineers can design the launching plan early\u2014sometimes months ahead.<\/p>\n\n\n\n<p>This planning is even more important when launching large vessels with <strong>ship launching airbags<\/strong>, because the required water depth must match the ship\u2019s draft at the moment it enters the water.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-how-tides-affect-ship-launching-using-marine-airbags\"><strong>4. How Tides Affect Ship Launching Using Marine Airbags<\/strong><\/h2>\n\n\n\n<p>Tides influence many parts of the launching process:<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-1-water-depth-during-launching\"><strong>4.1 Water depth during launching<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>High tide<\/strong> provides deeper water, reducing grounding risks.<\/li>\n\n\n\n<li><strong>Low tide<\/strong> may expose shallow areas or uneven seabeds.<\/li>\n<\/ul>\n\n\n\n<p>If the water is too shallow, the vessel may stop suddenly, overload the airbags, or damage the keel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-2-launching-speed-and-sliding-distance\"><strong>4.2 Launching speed and sliding distance<\/strong><\/h2>\n\n\n\n<p>With more water, the ship floats earlier and slows down smoothly.<br>With less water, the ship travels farther on airbags before floating, increasing friction and impact forces.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-3-horizontal-tidal-currents\"><strong>4.3 Horizontal tidal currents<\/strong><\/h2>\n\n\n\n<p>Tides also move water horizontally. Strong currents can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Push the vessel sideways<\/li>\n\n\n\n<li>Cause yawing during entry<\/li>\n\n\n\n<li>Create uneven pressure on airbags<\/li>\n\n\n\n<li>Affect the final stopping point<\/li>\n<\/ul>\n\n\n\n<p>Shipyards must check tide and current predictions together.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-4-4-safety-risks\"><strong>4.4 Safety risks<\/strong><\/h2>\n\n\n\n<p>Incorrect tide choices can cause:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Side-slip or drifting<\/li>\n\n\n\n<li>Overloaded airbags<\/li>\n\n\n\n<li>Grounding<\/li>\n\n\n\n<li>Excessive impact at final float-off<\/li>\n\n\n\n<li>Damage to shore structures<\/li>\n<\/ul>\n\n\n\n<p>This is why tide planning is a core part of every airbag launching plan.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-5-using-tide-data-in-shipyard-and-launching-design\"><strong>5. Using Tide Data in Shipyard and Launching Design<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-1-slipway-and-facility-design\"><strong>5.1 Slipway and facility design<\/strong><\/h3>\n\n\n\n<p>During shipyard construction, many underwater works are done at <strong>low tide<\/strong> to reduce cost and improve visibility.<br>But the <strong>launching water level<\/strong> is determined by analyzing years of tidal data. Engineers calculate the minimum tide height needed to launch safely with marine airbags based on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Vessel size<\/li>\n\n\n\n<li>Launching slope<\/li>\n\n\n\n<li>Required buoyancy<\/li>\n\n\n\n<li>Local tidal range<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-2-planning-the-launching-moment\"><strong>5.2 Planning the launching moment<\/strong><\/h3>\n\n\n\n<p>Shipyards choose a time slot that offers:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Safe water depth<\/li>\n\n\n\n<li>Low current speed<\/li>\n\n\n\n<li>Smooth tidal change<\/li>\n<\/ul>\n\n\n\n<p>In semi-diurnal tide regions, shipyards often have both a morning and afternoon launching window.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-3-tide-tables-in-daily-operations\"><strong>5.3 Tide tables in daily operations<\/strong><\/h3>\n\n\n\n<p>Before launching, engineers check:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High tide time<\/li>\n\n\n\n<li>Expected tide height<\/li>\n\n\n\n<li>Spring or neap tide period<\/li>\n\n\n\n<li>Horizontal current predictions<\/li>\n<\/ul>\n\n\n\n<p>Good tide planning reduces risks, saves cost, and improves launching success.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-5-4-inland-or-non-tidal-waters\"><strong>5.4 Inland or non-tidal waters<\/strong><\/h3>\n\n\n\n<p>For rivers or lakes with <strong>no tide<\/strong>, designers must rely on multi-year records of flood levels and low-water periods instead of tide tables.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-6-practical-tips-for-launching-with-marine-airbags-under-tidal-conditions\"><strong>6. Practical Tips for Launching with Marine Airbags Under Tidal Conditions<\/strong><\/h2>\n\n\n\n<p>Here are simple but effective rules:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tip-1-choose-stable-tide-phases\"><strong>Tip 1 \u2014 Choose stable tide phases<\/strong><\/h3>\n\n\n\n<p>Avoid very fast rising or falling tides. Middle stages are easier to control.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tip-2-check-tidal-currents-not-only-tide-height\"><strong>Tip 2 \u2014 Check tidal currents, not only tide height<\/strong><\/h3>\n\n\n\n<p>Even if water is deep, strong currents may push the ship sideways.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tip-3-use-high-tide-for-large-vessels\"><strong>Tip 3 \u2014 Use high tide for large vessels<\/strong><\/h3>\n\n\n\n<p>Bigger ships need more water depth to float safely.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tip-4-inspect-seabed-conditions-during-low-tide\"><strong>Tip 4 \u2014 Inspect seabed conditions during low tide<\/strong><\/h3>\n\n\n\n<p>It helps engineers understand the slipway, underwater slope, and potential grounding points.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-tip-5-keep-monitoring-during-the-launch\"><strong>Tip 5 \u2014 Keep monitoring during the launch<\/strong><\/h3>\n\n\n\n<p>Track the tide height and current every few minutes.<br>Conditions may change faster than expected.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-7-conclusion\"><strong>7. Conclusion<\/strong><\/h2>\n\n\n\n<p>Tides influence every stage of <strong>ship launching using airbags<\/strong>\u2014from early slipway design to the exact minute the ship enters the water. By understanding tidal behavior, reading tide tables, and planning around local tidal conditions, shipyards can launch vessels more safely and efficiently.<\/p>\n\n\n\n<p>Marine airbags are flexible and powerful tools, but tides always decide how smooth the final launching moment will be. Good tide planning means a safer launch, lower cost, and a more predictable operation.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link has-background wp-element-button\" href=\"https:\/\/www.sunhelmmarine.com\/contact-us\/\" style=\"background-color:#035584\">free consultation<\/a><\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>FAQ About Marine Fenders<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. What are marine fenders used for?<\/strong><\/h3>\n\n\n\n<p>Marine fenders absorb impact between ships and docks, preventing hull damage and protecting port structures during berthing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. What types of marine fenders are most common?<\/strong><\/h3>\n\n\n\n<p>The main types include pneumatic fenders, foam filled fenders, rubber fenders (like cone, arch, and cylindrical types), and floating fenders. Each type serves different berthing needs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>3. How do I choose the right marine fender?<\/strong><\/h3>\n\n\n\n<p>You should consider the vessel size, berthing energy, tidal range, pier structure, and environmental conditions. Larger vessels usually need high-energy fenders like pneumatic or cone rubber fenders.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>4. Are pneumatic fenders good for large ships?<\/strong><\/h3>\n\n\n\n<p>Yes. Pneumatic fenders offer high energy absorption and low reaction force, making them ideal for tankers, bulk carriers, and offshore projects.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>5. How long do marine fenders last?<\/strong><\/h3>\n\n\n\n<p>High-quality marine fenders can last 8\u201315 years depending on material, UV exposure, and maintenance. Foam filled fenders often have a longer usable life because they don\u2019t deflate.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>6. Can marine fenders float?<\/strong><\/h3>\n\n\n\n<p>Yes. Pneumatic fenders and foam filled fenders are fully floating, which makes them useful in areas with large tidal changes.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>7. Do marine fenders require maintenance?<\/strong><\/h3>\n\n\n\n<p>Most types require light maintenance. Pneumatic fenders need regular pressure checks, while rubber fenders mainly need surface inspection and bolt tightening.<\/p>\n\n\n\n{\n  &#8220;@context&#8221;: &#8220;https:\/\/schema.org&#8221;,\n  &#8220;@type&#8221;: &#8220;FAQPage&#8221;,\n  &#8220;mainEntity&#8221;: [\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;What are marine fenders used for?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Marine fenders absorb impact between ships and docks, preventing hull damage and protecting port structures during berthing.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;What types of marine fenders are most common?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Common types include pneumatic fenders, foam filled fenders, rubber fenders such as cone, arch, and cylindrical types, and floating fenders.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;How do I choose the right marine fender?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Choose based on vessel size, berthing energy, tidal range, pier structure, and environmental conditions. Larger vessels usually need high-energy fenders.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;Are pneumatic fenders good for large ships?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Yes. Pneumatic fenders offer high energy absorption and low reaction force, making them ideal for tankers, bulk carriers, and offshore projects.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;How long do marine fenders last?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;High-quality marine fenders can last 8\u201315 years depending on material, UV exposure, and maintenance level. Foam filled fenders often last longer because they do not deflate.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;Can marine fenders float?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Yes. Pneumatic fenders and foam filled fenders are fully floating, making them suitable for ports with large tidal changes.&#8221;\n      }\n    },\n    {\n      &#8220;@type&#8221;: &#8220;Question&#8221;,\n      &#8220;name&#8221;: &#8220;Do marine fenders require maintenance?&#8221;,\n      &#8220;acceptedAnswer&#8221;: {\n        &#8220;@type&#8221;: &#8220;Answer&#8221;,\n        &#8220;text&#8221;: &#8220;Most marine fenders require light maintenance. Pneumatic fenders need pressure checks, while rubber fenders need surface inspections and bolt tightening.&#8221;\n      }\n    }\n  ]\n}\n\n","protected":false},"excerpt":{"rendered":"<p>Launching a ship with marine airbags is one of the most flexible and cost-effective methods used by modern shipyards. Ship launching airbags can work on different<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":59933,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-61549","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.7.1 (Yoast SEO v26.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>The Impact of Tides on the Ship Launching of Marine Airbags - SunHelm Marine<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sunhelmmarine.com\/id\/the-impact-of-tides-on-the-ship-launching-of-marine-airbags\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Impact of Tides on the Ship Launching of Marine Airbags\" \/>\n<meta property=\"og:description\" content=\"Launching a ship with marine airbags is one of the most flexible and cost-effective methods used by modern shipyards. 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