{"id":11714,"date":"2026-04-08T19:21:43","date_gmt":"2026-04-08T19:21:43","guid":{"rendered":"https:\/\/daivings.lv\/?p=11714"},"modified":"2026-04-08T19:27:27","modified_gmt":"2026-04-08T19:27:27","slug":"heads-up-display-hud-attistiba-zemudens-dzivibas-nodrosinasanas-sistemas","status":"publish","type":"post","link":"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/","title":{"rendered":"Development of \u201cHeads-Up Display\u201d (HUD) in underwater life support systems"},"content":{"rendered":"<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2791\">The evolution of diving instruments has gone through three major phases: the analog era of mechanical pressure gauges, the digital era of handheld computers, and the modern era of integrated \u201cHeads-Up Display\u201d (HUD) systems. This transition is not just a change in display; it is a fundamental reconfiguration of the diver\u2019s cognitive load and situational awareness. Projection systems that display critical data (depth, gas pressure, and decompression status) directly in the diver\u2019s field of vision eliminate the need to constantly look away from the environment, thereby improving safety.<sup><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This article analyzes the evolution of HUD technology in five parts, covering history, optical physics, mechanical engineering, wireless protocols, and future perspectives on augmented reality (AR).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 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\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Contents\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Vesturiska_geneze_un_militara_pareja_uz_komercsektoru\" >Historical genesis and transition from military to commercial sector<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#CDDM_projekts_un_Oceanic_mantojums\" >The CDDM Project and Oceanic Legacy<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Optiska_inzenierija_un_zemudens_redzes_fizika\" >Optical engineering and physics of underwater vision<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Refrakcijas_indeksa_krize\" >Refractive index crisis<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Displeju_tehnologija_OLED_pret_LCD\" >Display Technology: OLED vs. LCD<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Aparaturas_arhitektura_un_mehaniska_integracija\" >Hardware architecture and mechanical integration<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Maskas_stiprinajuma_sistemas_Scubapro_modelis\" >Mask fastening systems (Scubapro model)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Tehniskas_sistemas_Shearwater_modelis\" >Technical systems (Shearwater model)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Bezvadu_datu_parraide_un_gaisa_integracija\" >Wireless data transmission and air integration<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Zemudens_parraides_fizika\" >Physics of underwater transmission<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Cilveka_faktori_un_papildinata_realitate\" >Human factors and augmented reality<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Biometriska_integracija_un_nakotne\" >Biometric integration and the future<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/#Secinajums\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Vesturiska_geneze_un_militara_pareja_uz_komercsektoru\"><\/span>Historical genesis and transition from military to commercial sector<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2792\">The development of the underwater HUD was driven by the need for hands-free operation for combat divers and special operations forces. In tasks involving underwater navigation, mine clearance or rescue operations, the diver cannot afford to manually check instruments.<sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"CDDM_projekts_un_Oceanic_mantojums\"><\/span>The CDDM Project and Oceanic Legacy<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2793\">The first significant step was a joint project between the company <em>Oceanic Worldwide<\/em> and the US Navy&#039;s Coastal Systems Station (CSS) in Florida. This collaboration resulted in the Combat Diver Display Mask (CDDM), which served as the basis for the first commercial HUD model: <em>Oceanic DataMask<\/em>.<sup><\/sup><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"360\" src=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2.png?v=1775676257\" alt=\"\" class=\"wp-image-11724\" srcset=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2.png?v=1775676257 640w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2-300x169.png?v=1775676257 300w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2-18x10.png?v=1775676257 18w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2-230x129.png?v=1775676257 230w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2-350x197.png?v=1775676257 350w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Oceanic-DataMask-2-480x270.png?v=1775676257 480w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><figcaption class=\"wp-element-caption\">Oceanic DataMask<\/figcaption><\/figure>\n\n\n\n<ol start=\"2000\" class=\"wp-block-list\">\n<li>released at the beginning of the year <em>DataMask<\/em> integrated a liquid crystal display (LCD) panel directly into the lower right quadrant of the mask lens. As can be seen in the documentation for modern systems, this design used a proprietary optics package to magnify the data, creating the illusion that the information was \u201cfloating\u201d into the distance.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Year<\/strong><\/td><td><strong>Event<\/strong><\/td><td><strong>Technology<\/strong><\/td><td><strong>Impact on the industry<\/strong><\/td><\/tr><\/thead><tbody><tr><td>1972<\/td><td>Oceanic founded (Bob Hollis)<\/td><td>Analog instrumentation<\/td><td>The basis for the production of diving equipment in the USA.<sup><\/sup><\/td><\/tr><tr><td>End of 1990<\/td><td>CDDM Project (US Navy\/Oceanic)<\/td><td>LCD projection<\/td><td>Demonstrated the viability of HUD in combat conditions.<sup><\/sup><\/td><\/tr><tr><td>2008<\/td><td>Oceanic DataMask Launch<\/td><td>Integrated LCD HUD<\/td><td>The first commercial \u201chands-free\u201d computer.<sup><\/sup><\/td><\/tr><tr><td>2016<\/td><td>NSWC PCD DAVD prototype<\/td><td>Transparent AR HUD<\/td><td>Introduced \u201cIronman\u201d style sonar overlay.<sup><\/sup><\/td><\/tr><tr><td>2019<\/td><td>Scubapro Galileo HUD release<\/td><td>Micro-OLED mask mount<\/td><td>Popularized modular, foldable architecture.<sup><\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Optiska_inzenierija_un_zemudens_redzes_fizika\"><\/span>Optical engineering and physics of underwater vision<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2800\">The biggest challenge in HUD design is the human eye&#039;s inability to focus on objects that are only a few centimeters away. In a terrestrial environment, the eye&#039;s closest focal point is about 20 cm. Without corrective optics, any image placed near the mask lens (5\u201310 cm away) would be an illegible blur.<sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Refrakcijas_indeksa_krize\"><\/span>Refractive index crisis<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2801\">Underwater, the problem is compounded by the loss of refractive power between air and the cornea. The human eye&#039;s focusing power depends on the transition between air ($n \\approx 1.0$) and the cornea ($n \\approx 1.376$). When immersed in water ($n \\approx 1.33$), this power is neutralized, causing a loss of about 42 diopters.<sup><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2802\">To solve this, systems such as <em>Scubapro Galileo HUD<\/em> (shown in Figure 1) and <em>Shearwater NERD 2<\/em> uses a \u201cdry\u201d optical path. The microdisplay is sealed in a hermetic housing with an air pocket. Collimating lenses transform the display rays into parallel beams, creating a virtual image. <em>Scubapro<\/em> In this case, the image appears at a distance of approximately 1 meter. <sup><\/sup>, in turn <em>Shearwater NERD 2<\/em> uses a magnifying lens to create the effect of a 25-inch TV screen at a distance of 3 meters.<sup><\/sup><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"700\" src=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-1024x700.jpg\" alt=\"Scubapro Galileo HUD\" class=\"wp-image-11716\" srcset=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-1024x700.jpg?v=1775675823 1024w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-300x205.jpg?v=1775675823 300w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-768x525.jpg?v=1775675823 768w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-18x12.jpg?v=1775675823 18w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-1000x684.jpg?v=1775675823 1000w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-230x157.jpg?v=1775675823 230w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-350x239.jpg?v=1775675823 350w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2-480x328.jpg?v=1775675823 480w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-2.jpg?v=1775675823 1041w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong><em>Scubapro Galileo HUD<\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Displeju_tehnologija_OLED_pret_LCD\"><\/span>Display Technology: OLED vs. LCD<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2803\">Modern units have moved to Micro-OLED technology due to its self-emitting nature. OLED provides excellent contrast and power efficiency (black pixels consume no power), which is critical for diving at night or in murky water.<sup><\/sup> <em>Galileo HUD<\/em> (Figure 4) OLED brightness is prioritized to ensure readability even in strong sunlight on the surface.<sup><\/sup><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Aparaturas_arhitektura_un_mehaniska_integracija\"><\/span>Hardware architecture and mechanical integration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There are two main approaches to HUD integration: a mask-mounted modular system and a controller\/loop-mounted technical system.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Maskas_stiprinajuma_sistemas_Scubapro_modelis\"><\/span>Mask attachment systems (<em>Scubapro<\/em> model)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2804\"><em>Scubapro Galileo HUD<\/em> is a modular device that attaches to the bridge of the mask (see Figure 1). Its main advantage is a hinge mechanism that allows the display to be folded up when not needed, for example, when taking macro photography or swimming on the surface.<sup><\/sup> The user interface is controlled by a single rotating dial, which is easy to operate even with thick neoprene gloves.<sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tehniskas_sistemas_Shearwater_modelis\"><\/span>Technical systems (<em>Shearwater<\/em> model)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2805\"><em>Shearwater NERD 2<\/em> (Near Eye Remote Display) attaches to the second stage regulator hose or rebreather loop (Figure 3). This architecture is popular with technical divers because it is independent of mask choice. If the mask floods or is lost, the diver does not lose access to data while the regulator is in the mouth.<sup><\/sup> The body of this device is more durable and designed for depths of up to 300 meters.<sup><\/sup><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-1024x768.png?v=1775676440\" alt=\"\" class=\"wp-image-11726\" srcset=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-1024x768.png?v=1775676440 1024w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-300x225.png?v=1775676440 300w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-768x576.png?v=1775676440 768w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-16x12.png?v=1775676440 16w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-1000x750.png?v=1775676440 1000w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-230x173.png?v=1775676440 230w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-350x263.png?v=1775676440 350w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2-480x360.png?v=1775676440 480w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/Shearwater-NERD-2.png?v=1775676440 1424w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><em>Shearwater NERD 2<\/em><\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><td><strong>Mechanical aspect<\/strong><\/td><td><strong>Mask attachment<\/strong><\/td><td><strong>Regulator mount<\/strong><\/td><\/tr><\/thead><tbody><tr><td><strong>Platform<\/strong><\/td><td>Diving mask (center)<\/td><td>Reg. hose \/ CCR loop<\/td><\/tr><tr><td><strong>Mobility<\/strong><\/td><td>Folding up <sup><\/sup><\/td><td>Fixed or movable on the hose<\/td><\/tr><tr><td><strong>Depth rating<\/strong><\/td><td>120m (recreational\/technical) <sup><\/sup><\/td><td>300m (extreme technical) <sup><\/sup><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"384\" height=\"180\" src=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3.jpeg\" alt=\"\" class=\"wp-image-11718\" srcset=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3.jpeg?v=1775675826 384w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3-300x141.jpeg?v=1775675826 300w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3-18x8.jpeg?v=1775675826 18w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3-230x108.jpeg?v=1775675826 230w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-3-350x164.jpeg?v=1775675826 350w\" sizes=\"auto, (max-width: 384px) 100vw, 384px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bezvadu_datu_parraide_un_gaisa_integracija\"><\/span>Wireless data transmission and air integration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The HUD&#039;s usefulness is maximized when it displays the air pressure in the balloon. This is achieved through wireless air integration (AI).<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"225\" height=\"225\" src=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-1.jpeg\" alt=\"\" class=\"wp-image-11719\" srcset=\"https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-1.jpeg?v=1775675827 225w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-1-150x150.jpeg?v=1775675827 150w, https:\/\/daivings.lv\/wp-content\/uploads\/2026\/04\/HUD-scuba-diving-masks-1-12x12.jpeg?v=1775675827 12w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><figcaption class=\"wp-element-caption\">HUD utility<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Zemudens_parraides_fizika\"><\/span>Physics of underwater transmission<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2809\">Traditional signals (Bluetooth, Wi-Fi) operate at a frequency of 2.4 GHz, which is absorbed by water molecules at a distance of a few centimeters.<sup><\/sup> To get around this, the diving industry uses very low frequency (VLF) waves, typically 38 kHz.<sup><\/sup> This frequency is able to travel reliably through salt water for a distance of about 1.5 meters, reaching the mask receiver from the first stage of the cylinder.<sup><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Modern transmitters, such as <em><strong>Shearwater Swift<\/strong><\/em>, uses collision avoidance protocols:<\/p>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li><strong>Unique ID codes<\/strong>: Each transmitter has a unique serial number to prevent signal mixing between divers on board.<\/li>\n\n\n\n<li><strong>Channel \u201clistening\u201d<\/strong>: The transmitter checks whether the frequency is free before sending data.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cilveka_faktori_un_papildinata_realitate\"><\/span>Human factors and augmented reality<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2812\"><strong>The goal of HUD is to reduce \u201ctask saturation.\u201d<\/strong> However, a poorly designed user interface (UI) can cause \u201cattention tunneling,\u201d where the diver becomes overly focused on the numbers and fails to notice dangers in the environment.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Biometriska_integracija_un_nakotne\"><\/span>Biometric integration and the future<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2813\">Research in 2025 suggests integrating biometric sensors directly into the skirt of the mask. Using photoplethysmography (PPG), the mask can measure heart rate and oxygen saturation ($SpO_2$) through the skin of the forehead.<sup><\/sup> If your heart rate is rising rapidly, the HUD may issue a warning: \u201cRelax and breathe slower\u201d to prevent panic or CO2 buildup.<sup><\/sup><\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2814\">Future \u201csmart masks\u201d (as seen in conceptual Figure 2) will use artificial intelligence to identify fish species in real time, show navigation paths to shipwrecks, and connect to the cloud for post-dive analysis.<sup><\/sup><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Secinajums\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"p-rc_549c6558b9e5aec6-2815\">Underwater HUDs have evolved from exotic military prototypes to critical safety tools. By harmonizing optical physics, mechanical strength, and wireless communications, these systems have transformed the diving mask into an intelligent interface, ensuring that the most important information is always in front of your eyes.<sup><\/sup><\/p>","protected":false},"excerpt":{"rendered":"<p>The evolution of diving instruments has gone through three major stages: the analog era of mechanical pressure gauges, the digital era of handheld computers, and the modern era of integrated \u201cHeads-Up Display\u201d (HUD) systems. This transition is not just a change in display; it is a fundamental shift in the diver\u2019s cognitive load and situational awareness [\u2026]<\/p>","protected":false},"author":1,"featured_media":11715,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-11714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zemudens-pasaule"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>&quot;Heads-Up Display&quot; (HUD) att\u012bst\u012bba zem\u016bdens dz\u012bv\u012bbas nodro\u0161in\u0101\u0161anas sist\u0113m\u0101s - Daivings.lv<\/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:\/\/daivings.lv\/en\/heads-up-display-hud-development-underwater-life-support-systems\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"&quot;Heads-Up Display&quot; 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