Category Archives: Cave and Tech Diving course

TDI Cave and Tech Diving course – Playa del Carmen – Tulum – Mérida – Yucatan – Mexico

Cenote Maravilla

Cenote Maravilla

Heaven for photographers and free divers

By: Peio - No Limit Mexico, April 8th, 2020

Located in the famous “Ruta de los Cenotes” (road of the cenotes), Maravilla is one of the newest opened spots for Scuba and free diving in the Riviera Maya.

After Vicente Fito’s exploration a road has been built to enable easy access for vehicles and a platform to enter the water.

Quickly, the whole diving community (guides and instructors) were invited by the owner to do a recon dive and we started to add it on our excursion list.


To describe it, the cenote is a sinkhole with the shape of a bell, where the entrance is a hole in the middle of the top. The really thick sulfur cloud offers views that look from another planet…

Getting really close to this cloud is necessary to observe the gorgeous living stalactites, the biothemes often called “Hell’s bells”. Those mysterious rock formations are alive and grow underwater thanks to very special endemic bacteria. This type of formation as well called “elephant feet” has been found in only 4 cenotes, all of them in the Puerto Morelos area and are subject to ongoing scientific research.

A huge number of fossils can be found on the walls at a depth around 50 feet/15M. During our guided tour, we do a multilevel profile to see them. During the safety stop, the long stalactites coming from the ceiling, near by the opening offer a wonderful view. All the elements together, crystal clear water, bright sunlight, white stalactites and the tree background are mind blowing.

The main reason for Cenote Maravilla’s success is the spectacular sun light beam that crosses the canopy, hits the surface and enlightens the center of the cenote until the cloud. The colors of this bright light beam vary regarding the season, between white blue and greenish.

Depending on the time, its angle changes and offers multiple features where the bright light meets the darkness.

The good infrastructure, the dive profile, its depth and the space available in the water column are the reason why we use it for technical diving training. Within courses like TDI Advanced Nitrox, TDI Deco Procedures, TDI Extended Range or Trimix Diver, PADI Tec 40 or PADI Tec Deep, it is a great place to simulate an ascent following a deco schedule, how to stick to the Run Time or to calculate a precise RMV or SAC rate.

Big efforts have been made by the owner for a sustainable and ecological use. On the property, they are clean dry toilets, and a solar panel supplies enough electricity for the caretaker, Don Miguel that has a great knowledge about botanic and plants. Organic trash is collected in a compost area that is then used as a fertilizer for plants.

We have special thoughts for the free divers that practice their sport really often in this beautiful place. They clearly participate to the success of Maravilla by the publication of amazing pictures and media.

Cenote Maravilla is open for scuba diving all year around. For a perfect dive excursion, It is great to combine it with Cenote Kin Ha or Cenote Zapote, other beautiful sink holes on the Puerto Morelos area.

The entrance fee is 300 Mexican pesos (+/- 15 USD). Cameras are allowed and some rules apply.

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Cenote Kukulkan

Kukulkan has also its little treasures: Aragonite cristals hidden like little gems in a jewel box .

sidemount diving in cenote Kukulkan
Geraldine side mount diving in a Razor harness in Cenote Kukulkan

  • Certification needed: OW Diver
  • Difficulty: Easy
  • Entry fee: 250$ Pesos
  • Access to the water: short walk from the parking lot and Stone steps to both Little Brother and Chac Mool
  • Max depth: 15m/50f
  • Infrastructure: Bathroom – Changing room – Snack bar
  • Combine with: Chac Mool
  • Features: light, fossils, halocline, stalactites


Cavern Diving in the Cenotes

Diving Training

Deep Dark Diving dive training Philosophy

We offer high quality training in technical diving and cave diving in Playa del Carmen, all the Riviera Maya and in Yucatan, Mexico.

We strive to provide the best learning experience. The objective is to achieve the highest level and learn from each moment. Then by using what you learn you will improve your performance and the safety of your diving.

There is a minimum days required by standards for technical and cave diving training, but be aware that you will personnaly need to meet the diving standards.

All training is based on skills mastering. We do our best to share our experience and knowledge with you and ensure the efficiency of your training but technical or cave diving certification is not garanteed.

Fun diving on the coral reef in the Caribbean Mexico


70% of the earth surface is water. Start exploring! Open Water courses for beginners all the way to Instructor


Fun and Safe way to dive for recreational divers - Ideal for Cave divers, Solo Divers and Photographers

Installing a jump spool in Cenote Minotauro


Learn overhead diving in the most extensive underwater caves on the planet. Master buoyancy and precise control of every movement.


Experienced diver? It is time to extend your dives and explore new environments. Nitrox, Deco Procedure, Mixed gases, Stage Cave, DPV, CCR

Dive Razor Original

Extended Range

Extended range
Deco stop at Cenote the Pit, Dos Ojos

Some parts of the world offer spectacular dives at depths greater than 39 meters / 130 feet, but there is no access (or very limited access) to helium. The TDI Extended Range course teaches you the proper techniques to efficiently use compressed air as a bottom gas to a maximum depth of 55 meters / 180 feet. Extended Range training provides knowledge of equipment requirements as well as the dangers of deep diving requiring nitrox or oxygen decompression stops.

Dives not to miss!

  • Spectacular dives deeper than 39 metres/130 feet
  • No access to helium
  • Learn the proper techniques for safely using compressed air as a breathing gas
  • Staged decompression (with nitrox or oxygen)
  • Maximum depth of 55 metres/180 feet
Course prerequisites
What you will learn during your extended range training
  • History of deep air diving
  • Physics
  • Physiology
  • Decompression Options (Air, Nitrox, Oxygen)
  • Equipment considerations
  • Dive planning
  • Technical dive support
  • Navigation
In water skills
  • Use START before every dive
  • Stress analysis and mitigation
  • Gas matching procedures
  • Demonstrate buoyancy control
  • Good awareness, communications, proximity and team oriented dive practices
  • Manage 2 stage cylinders,
  • Gas switches
  • Lift bag deployment
  • Air-sharing ascent
  • Contingency decompression schedule
  • Remove and replace mask, deploy back up mask
  • Tired diver tow
  • Breath-hold swim
  • Execute the planned dive
  • Switching and isolating a malfunctioning regulator,
  • Navigational techniques
  • Ascent with ascent reel and lift bag and perform staged decompression
What’s next



Plongée dans le Yucatan, Mexique  –  Cours de plongée et Plongées guidées

Deep Dark Diving offre un service personnalisé pour vos plongées dans la Riviera Maya et le Yucatan au Mexique

Dévoués à la sécurité et à la conservation, nous sommes spécialisés dans la plongée Cenote et la plongée souterraine. Nous offrons des plongées guidées ainsi que des formations en plongée souterraine et plongée technique pour plongeurs débutants et confirmés.

Nous avons une passion pour la plongée, une passion pour les grottes, une passion pour la plongée souterraine que nous aimons partager avec vous afin de vous faire profiter au mieux de votre expérience de plongée sous-marine dans le Yucatan.


Bull Sharks - Playa del carmen


Récifs de Playa del Carmen - Akumal - Plongée a Cozumel depuis Playa del Carmen - Requins bouledogues


Unique au monde: découvrez la plongée en caverne dans les Cenotes


Découvrez le monde caché des Cenotes du Yucatan – Stage – DPV – CCR


Cenote Kukulkan, plongée caverne dans la lumière hivernale


Premier pas vers la plongée souterraine. Vous apprendrez les procédures de la plongée sous plafond dans la zone de lumière naturelle

Introduction à la Plongée souterraine


Voilà! C’est parti dans l’obscurité totale et vous pourrez réaliser des plongées simples au-dela de la zone de lumière naturelle

Cours de plongée souterraine


Les réseaux souterrains peuvent être très complexes, surtout au Mexique. Vous pourrez maintenant combiner tout ce que vous avez appris avec des navigations complexes et plus encore


Introduction à la plongée technique


Bases de la plongée technique – Plannification – nouvelle configuration et meilleur hydrodynamisme – Améliorer flottabilité et techniques de palmage. Etablir une base solide. 

Cours de plongée Sidemount


Premiers pas en configuration Sidemount. Pour plongeurs tec souhaitant transposer leurs aptitudes à la configuration Sidemount. Ou pour débutants ayant choisi la configuration Sidemount.


Un cours de Side Mount plus approfondi. Il couvre les bases necessaires à la plongée technique et la plongée souterraine et constitue une base solide. De plus votre harnais Razor vous suivra à tous les niveaux de plongée technique.


Nitrox sticker SDI TDI - TDI Nitrox Course


Premier pas vers l’utilisation de mélanges. Pour plongeur Nitrox certifié c’est l’occasion de revoir les bases théoriques, la physique et les lois fondamentales en profondeur avant d’aller plus loin.

Cours de Nitrox Avancé


Physique et physiologie de la plongée aux mélanges contenant plus de 40 % d’oxygène. Rallonger votre temps de plongée sans entrer en décompression

Cours de procédures de d´compression


Plannifier et réaliser des plongées a décompression . Choix des gas et exécution de plan d’urgence.


Deco stop at Cenote the Pit, Dos Ojos


Des plongées superbes à  55m/180ft mais pas d’helium disponible? Vous apprendrez comment plonger en sécurité en utilisant de l’air et des gaz de décompression.

Cours de plongée trimix


Rajoutez l’hélium à vos plongées. Allez plus profond, respirez mieux et réduisez la narcose. Ca rend vos plongées beaucoup sûres et offre de nombreuses possibilités jusqu’à 60m/200ft.

Cours de trimix avancé


Félicitations! Vous avez atteint le plus haut niveau de plongée en circuit ouvert. Utilisez des mélanges avec moins de 17% O2 et à des profondeurs de 100m/330ft. Et faites partie de l’élite de la plongée.

Dive Razor Original
ISC Megalodon



 Scuba Diving in Yucatan
Dive Training and Guiding

Deep Dark Diving provides personalized service for your diving in Yucatan, Mexico. Private guiding for individuals and special packages for groups.

Highly committed to safety and conservation we specialize in Cenote cavern, cave and Tech diving. We offer guiding and training for recreationnal divers and for advanced technical and cave divers.

We have a passion for diving, a passion for caves, a passion for cave diving and we’d love to share it with you and make sure you get the most out of your scuba diving experience.

Diving yucatan
Beautiful Cenotes of Yucatan


Bull sharks diving - Mexico


Dive the second largest reef in the world – Experience the thrill of diving with bull sharks

Cavern diving in the Cenotes


Unique in the world: discover cavern diving in the Cenotes



The best way to discover the amazing caves of Yucatan –
Stage – DPV – CCR


cavern diver course


First step in the Overhead environment. You will learn all safety protocols within the daylight zone. 

Intro to cave diver course


That’s it! this is the first step in the dark caves. You will learn how to do simple cave dives beyond daylight zone

full cave diving training


Caves can be complex, especially in Mexico, you will now combine previously learned skills with complex navigation, and more.


Intro to Tech Diving training


Basics for tech diving in Backmount configuration: dive planning, water skills, gear configuration, streamlining, buoyancy and propulsion techniques

Side Mount Diving Training


Get familiar with the side mount for Tec divers wanting to learn the configuration or recreational divers taking their first steps into the Tec or cave diving world

Razor Side Mount Diving Course


The Razor Side Mount course covers the basics for tech and cave diving further than basic courses. Then you can focus on the core of subsequent training in your Razor.



TDI Nitrox Course


A first approach to technical diving and the use of mixtures. And for those already Nitrox certified diver it is the opportunity to thoroughly review the basic principles and fundamental laws of physics used in diving.



You will learn the physics and physiology for diving with gas mixtures containing more than 40 % oxygen. This is the opportunity to further extend of your dive time without going into decompression limits.



In this course you will learn to plan and execute dives with decompression, choose your gas and the development of emergency plans.


Extended range course


Exciting dives down to 55m/180ft but helium is nowhere available? you will learn how to safely do these dives using air and deco gases.



Add helium to your diving. Go deeper, easier breathing, and reduce narcosis. It makes your diving a lot safer and opens a lot of possibilities down to 60m/200ft.

Technical diving training - Advanced Trimix diving


Congratulations! you reached the top level of Open circuit training. Use mix with less than 17% O2 and as deep as 100m/330ft. And be among the most elite divers.

Dive Razor Original

Intro to Tech Diving

Valve shutdown in backmount configuration

The Intro to Tech Course extends recreational training by improving dive planning methods, in-water skills, and streamlining existing gear configurations.

After following this class you will become a more proficient diver and expand your diver skills and knowledge.

  • expand diver knowledge
  • start technical training
  • refresher for certified technical diver
  • Minimum age 18, 15 with parental consent
  • Minimum certification: Open Water Scuba Diver or equivalent
  • 25 logged  dives


What you will learn
  • In-depth dive planning,
  • advanced buoyancy control
  • finning techniques
  • gas management,
  • situational awareness,
  • proper trim,
  • gear configuration


Decompression Procedures Diver


The decompression procedures course is an exciting step further into your dive career.

Decompression ProceduresYou can train in your properly configured recreational gear with just an extra stage for the deco gas. You will only need and extra regulator and stage rig and you can still join regular dive operation which is a great advantage.

If you already are an Intro to tech or Sidemount diver you can use this configuration with an extra deco tank.

You will get the best out of this training if you already are an Advanced Nitrox diver or if you combine Decompression Procedures and  Advanced Nitrox.

These courses will be the foundation of all other technical courses.

Objectives of the Decompression Procedures Course
  • Extend your bottom time
  • Safely execute decompression dives
  • Dive deeper
  • Look deeper into the decompression theory
  • Extend your diving techniques
  • 3 days minimum
  • Dives: 4 dives minimum (including 2 below 30 metres / 100 feet)
  • Adv. Nitrox + Deco Procedures: 6 dives minimum
  • Depth: 45 metres/150 feet.
Course prerequisites
  • Minimum age 18
  • Minimum certification of SDI Advanced Adventure Diver, Advanced Diver, or equivalent
  • 25 logged open water dives
  • Primary cylinder(s), Independent or isolated back-mounted
  • Decompression mix cylinder(s) (with submersible pressure gauge and Labeled)
  • Depth gauge and bottom timer and / or dive computer
  • Regulator(s)
  • Buoyancy compensator device(s) (BCD) adequate for equipment configuration
  • Line cutting device
  • Ascent reel with lift bag /surface marker buoy
  • Oxygen (O2) analyzer; may be supplied by the instructor
  • Exposure suit adequate for the open water environment
  • Underwater slate
What will you learn?
  • Choosing the Decompression gas
  • The use of dive Tables and personal dive computers
  • How to set Emergency and contingency plans  (in order to face equipment failure, omitted decompression, etc.)
  • Decompression diving procedures
  • Choosing the equipment and configuration
  • Pre-dive checks and drills
  • Stress analysis and mitigation
  • Following a decompression schedule
  • Gas switching
  • Team awareness and communication
  • SMB/lift bag deployment
  • Proper trim, buoyancy and finning techniques
  • Emergency procedures (in case of equipment failures, catastrophic gas loss, omitted decompression, navigational errors, etc.)
  • Equipment considerations, cylinder labeling, analyzing nitrox mixtures, and gas blending procedures
 What’s next?

Nitrox     Advanced Nitrox     Extended Range     Trimix


Advanced Nitrox Course


A stepping stone to greater diving!

The use of oxygen and oxygen enriched air mixture is critical to advenced applications in diving. This course will arm you with the knowledge and understanding of the risks and benefits associated with these gases.

You have been enjoying your recreational diving and you are ready to go a step further. Then the Advanced Nitrox course is a great introduction into the world of Technical Diving. During your course you will complete dives to 130ft/40m in the safest manner possible with no stage decompression and using Nitrox up to 100% oxygen. You will tune up your buoyancy control in a new configuration and of course work on stress mangament and problem solving. And also very important in technical diving you will start planning your dives.

This course combines perfectly with the Decompression Procedures course. This will be the foundation of your technical diving career and of course give you a better understanding of technical diving.

It is just the beginning of the progression into more advanced applications in diving.

  • Extend your dive time safely!
  • Ideal for scientific divers, photographers or divers simply wishing to stay underwater longer
  • Use mixture containing up to 100% oxygen.
  • Entry level tec course
  • No need for big configuration changes: only one extra tank

Two direct applications

  • Hyperoxic mixes significantly increase bottom time at moderate depth
  • Mixes of high Oxygen considerably accelerate decompression
  • Minimum age 18, 15 with parental consent
  • Minimum certification: Nitrox Diver or equivalent
  • 25 logged dives
Course duration
  • 3 days
  • Number of Dives: 4 minimum (>100′ bottom time)
  • Theory: 6 hours minimum
  • Maximum depth of 40 metres/130 feet
  • No decompression
  • Nitrox mix up to 100% Oxygen
What you will learn during the Advanced Nitrox Course
  • Physics and physiology relating to diving with gas mixes containing more than 40% oxygen
  • Gas planning, dive tables, dive computers, oxygen and nitrogen limitations
  • Equipment considerations, cylinder labeling, analyzing nitrox mixtures, gas blending procedures, and oxygen service ratings for using gases with more than 40% oxygen
Skills you will perform during the Advanced Nitrox courseAdvanced Nitrox course for extended dive times and limited decompression time
  • Polishing of buoyancy and swimming techniques
  • Good awareness and team oriented dive practices
  • Free flowing regulator, valves shut down, and regulator switch
  • Safety stop in neutral buoyancy
  • Share air with buddy
  • Position, trim, streamlining
  • Stress analysis personal and other team members

Nitrox course     Deco procedures