{"id":145,"date":"2026-03-17T18:15:04","date_gmt":"2026-03-17T18:15:04","guid":{"rendered":"https:\/\/zotz.mx\/?post_type=product&p=145"},"modified":"2026-04-21T19:53:19","modified_gmt":"2026-04-21T19:53:19","slug":"mixed-gas-ccr-diver","status":"publish","type":"product","link":"https:\/\/zotz.mx\/es\/producto\/mixed-gas-ccr-diver\/","title":{"rendered":"Mixed Gas CCR Diver"},"content":{"rendered":"
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Requirements<\/h3>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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Minimum age: 18 years.<\/p>\n

Provide a verified log of at least 50 hours of rebreather diving spread over at least 50 dives with the specific rebreather. Valid logged dives must be deeper than 9 meters \/ 20 feet; at least 20 must be deeper than 30 meters \/ 100 feet; and at least 10 dives must require staged decompression. If the diver has 50 hours in another CCR unit recognized by TDI, only 25 hours\/25 dives in the specific unit are required. If you are completing a unit crossover, provide proof of at least 10 logged CCR dives within the last 12 months.<\/p>\n

Hold the TDI Air Diluent Decompression Procedures Rebreather \/ TDI CCR Helitrox Diluent Decompression Procedures Diver certification or equivalent from agencies recognized by TDI.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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What will you learn?<\/h3>\n

Theory<\/h4>\n
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  • History and evolution of rebreathers.<\/li>\n
  • Comparison of open-circuit, closed-circuit, and semi-closed-circuit rebreather systems.<\/li>\n
  • Practical mechanics of the system.<\/li>\n
  • Gas physiology.<\/li>\n
  • Proper packing of the scrubber, according to the manufacturer\u2019s recommendations.<\/li>\n
  • Design and maintenance of electronic or manual systems.<\/li>\n
  • Dive tables.<\/li>\n
  • Dive computers.<\/li>\n
  • Dive planning.<\/li>\n
  • Emergency procedures.<\/li>\n
  • Considerations regarding helium.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n
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    Skills<\/h3>\n
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    • Assemble the unit according to the manufacturer\u2019s specifications using the manufacturer\u2019s manual\/checklist.<\/li>\n
    • Demonstrate familiarity with basic and intermediate hand signals.<\/li>\n
    • Select and prepare the appropriate equipment for a mild environment with long decompression stops.<\/li>\n
    • Conduct team drills for the deployment of lift bags and rescue procedures.<\/li>\n
    • Conduct buddy rescue drills.<\/li>\n
    • Properly analyze all gas mixtures to be used.<\/li>\n
    • Demonstrate adequate pre-dive planning.<\/li>\n
    • Perform pre-dive checks using the TDI pre-dive checklist.<\/li>\n
    • Use START* before each dive.<\/li>\n
    • Stress analysis and mitigation.<\/li>\n
    • Demonstrate a good understanding of team members through communication, proximity, and team-oriented diving practices.<\/li>\n<\/ul>\n
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      • Demonstrate buoyancy control; the ability to float in a fixed position in the water column without moving the hands or feet.<\/li>\n
      • Removal and replacement of the mask; deployment of the backup mask.<\/li>\n
      • Correctly execute a recovery following a system failure and complete the dive and decompression using open-circuit gases transported from a depth greater than 30 meters\/100 feet.<\/li>\n
      • Demonstrate the ability to connect to and share outboard gas, including the exchange of outboard rescue cylinders.<\/li>\n
      • Correctly execute a recovery following a system failure and complete the dive and decompression with the unit in manual mode.<\/li>\n
      • Blackouts and gas loss, correct selection and switch to outboard gases.<\/li>\n
      • Broken hoses, catastrophic failure scenarios.<\/li>\n
      • Flooded absorbent container.<\/li>\n
      • Cell malfunctions.<\/li>\n
      • SCR drill (minimum 10 minutes).<\/li>\n
      • Oxygen rebreather mode at depths less than 6 meters \/ 20 feet<\/li>\n
      • Stop at 3 to 6 meters \/ 10 to 20 feet during descent to check for a leak bubble.<\/li>\n
      • Demonstrate proficiency in handling 2 rescue cylinders, including dropping and retrieving them while maintaining position in the water column.<\/li>\n
      • Deployment of a lift bag \/ delayed surface marker buoy (DSMB) at depth and mid-water<\/li>\n
      • Simulation of lift bag \/ DSMB deployment failure.<\/li>\n
      • On 2 of the dives, demonstrate an ascent using an ascent reel and lift bag and perform a staged decompression.<\/li>\n
      • Monitoring of electronic systems for PPO\u2082 levels.<\/li>\n<\/ul>\n
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        • Validation checks of the tanks to ensure proper use of diluent and oxygen.<\/li>\n
        • Correct execution of the dive within all predetermined dive limits.<\/li>\n
        • Demonstration of decompression stops at predetermined depths.<\/li>\n
        • Demonstrate a controlled ascent with a simulated toxic diver, including a tow to the surface of at least 50 meters \/ 165 feet with removal of equipment at the surface, in water too deep to stand.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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          Included in the course:<\/h3>\n
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          • Private instructor.<\/li>\n
          • In-person sessions.<\/li>\n
          • Transportation to the cenotes or boat ride from the shop.<\/li>\n
          • Single, CCR, side-mount, and double tanks.<\/li>\n
          • Weight.<\/li>\n
          • EAN 32 fills.<\/li>\n
          • Certification card.<\/li>\n
          • Water and snacks.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n
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            Not included:<\/h3>\n
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            • Entrance fees to cenotes (between US$10 and US$15 per day).<\/li>\n
            • Diving equipment<\/li>\n
            • Manual or e-learning<\/li>\n
            • O2, decompression gases, and trimix (when applicable).<\/li>\n
            • Lunch.<\/li>\n
            • Diving insurance.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n
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              Servicios Adicionales<\/h3>\n
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              • Equipment Rental and\/or Sale<\/li>\n
              • Basic Diving Equipment<\/li>\n
              • Rental: $5 per item per day (Wetsuit, Mask, Boots, Fins).<\/li>\n
              • Sample Gas Rates<\/li>\n
              • \u200bEAN 50, 80 CUF. $21 per tank<\/li>\n
              • \u200bO2 100% 13 CUF. US$ 25 per tank<\/li>\n
              • \u200bTrimix 21\/35 80 CUF. US$ 85 per tank<\/li>\n
              • Cave diving equipment:<\/li>\n
              • Sidemount harness (Rental US$ 20 per day).<\/li>\n
              • Sidemount Regulator Set (Rental US$ 25 per day).<\/li>\n
              • Twinset Wing \/ Backplate (Rental US$ 20 per day).<\/li>\n
              • Twinset Regulator Set (Rental US$ 25 per day).<\/li>\n
              • Stage Regulator and Rig (US$ 15 per day).<\/li>\n
              • Primary Cave Light (US$ 20 per day).<\/li>\n
              • Backup Light (US$ 5 per day).<\/li>\n
              • Filter<\/li>\n
              • EAC Cartridge US$ 85 (approx. 4\u20135 hours of scrubbing)<\/li>\n
              • Sofnolime 8\u201312 US$ 12 per lb.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

                This is the intermediate-level certification course for divers who wish to use a closed-circuit rebreather (CCR) for mixed-gas diving. The objective of the course is to introduce divers to the benefits, hazards, and proper procedures for mixed-gas diving specifically with a CCR, using a mixed-gas diluent containing 16% or more oxygen, and to develop intermediate CCR diving skills appropriate for technical diving to a maximum depth of 60 meters \/ 200 feet.<\/p>\n

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                • Duration: 7 days<\/li>\n
                • Depth: 60 m<\/li>\n
                • Price per day per person<\/li>\n<\/ul>","protected":false},"featured_media":690,"template":"","meta":{"_themeisle_gutenberg_block_has_review":false},"product_brand":[],"product_cat":[28,25],"product_tag":[],"class_list":{"0":"post-145","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ccr-curso","7":"product_cat-curso","9":"first","10":"instock","11":"taxable","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/product\/145","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/media\/690"}],"wp:attachment":[{"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/media?parent=145"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/product_brand?post=145"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/product_cat?post=145"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/zotz.mx\/es\/wp-json\/wp\/v2\/product_tag?post=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}