Advanced Nitrox
This course examines the use of EAN-21 up to 100 percent oxygen to obtain optimal mixtures at a depth of 40 meters / 130 feet.
TDI Decompression Procedures or Introduction to Technology may be combined with this course at the instructor's discretion.
Price per day per person
BOOKING
Reservation confirmations require a 50% deposit. We accept bank transfer, credit card or PayPal. Full payment must be settled in Mexican pesos at the daily USD exchange rate or in cash prior to the start of your dive activity. Deposits for reservations are non-refundable, in certain circumstances, such as unforeseen medical issues or emergencies, the course or dive activities may be rescheduled. Any cancellation less than 24 hours prior to your first day of diving will be charged in full.
SCHEDULE
You can customize your course or dive trip according to your preferences and schedule throughout the year, we are open for training and diving seven days a week. The schedule can be adapted and subject to change due to weather conditions.
What will you learn?
Topics
Physics.
Pressure review
Physiology.
- Hypoxia.
- Oxygen toxicity.
Whole Body Oxygen Toxicity Units (OTU).
Central Nervous System (CNS)
- Nitrogen narcosis.
- Nitrogen absorption and elimination
- Carbon dioxide toxicity.
- Carbon monoxide toxicity.
Working formula.
- Calculations of the best mix
- Calculations of the maximum operating depth (MOD) of the mixture
Equipment considerations
- Less than 40 percent oxygen content.
- More than 40% oxygen content.
Immersion tables.
- Equivalent air depth with any table.
- Computer-generated tables.
Diving computers.
- Adjustable mix.
- Oxygen (O₂ )integrated.
Dive planning.
- Planning of the operation.
Gas requirements.
Oxygen limitations.
Nitrogen limitations.
Common mixing procedures (instructor will demonstrate a method)
- Mixing at partial pressure.
- Continuous mixing.
- Membrane separation system.
Decompression.
- Use of enriched air nitrox (EAN) as decompression gas, i.e. 50/50, 80/20, etc.
- Oxygen (O₂) for decompression.
- Advantages/disadvantages of multiple gas switches
Land drills:
Review of nitrox skills.
Demonstrate the correct use of the oxygen analyzer, including the optimal calibration procedure.
Demonstrate adequate pre-dive planning.
- Limits based on personal gas consumption.
- Limits based on oxygen exposure at depth.
- Limits based on nitrogen uptake at the planned depth with the actual mix.
Calculate and record the CNS load for each dive, including cumulative exposure where applicable.
Demonstrate understanding of gas labeling in accordance with local practices and/or regulations.
Demonstrate adherence to conventions regarding the preparation of equipment for oxygen service (O₂).
Program the nitrox computer with the appropriate oxygen percentage if used.
Correctly execute the planned dive within all predetermined limits.
Pre-dive and in-water skills
Use START* before each dive.
Stress analysis and mitigation
Demonstrate buoyancy control; ability to remain in a fixed position in the water column without moving hands or feet.
Demonstrate good awareness of buddy and other team members through communications, proximity and team-oriented diving practices. Demonstrate ability to manage the free flow of the primary regulator in a controlled manner, turn off the cycle and switch to the backup regulator.
Perform the proper safety stop while maintaining neutral buoyancy.
Demonstrate the ability to share air with the partner as receiver and donor in a controlled manner while maintaining position in the water column.
Demonstrate correct body position; proper trim, such as horizontal / aerodynamic when moving forward.
Demonstrate proper stress analysis with self and dive buddy.
Included throughout the course:
Private instructor.
Classroom sessions.
Transport to the cenotes or boat from the shop.
Single, CCR, side-mounted and double tanks.
Weights.
EAN 32 fillings.
Certification card.
Water and snacks.
Not included:
Entrance to cenotes (Per day between US$10 and US$15).
Dive Equipment
Manual or elearning
Nitrox or Helium mixtures.
Lunch.
Diving insurance.
Additional Services
Rental and/or sale of equipment
Basic diving equipment
Rental US$ 5 each per day (Wetsuit, Mask, Boots, Fins).
Gases Example
ES$ 21 per tank21 por tanque
O2 100% 13 CUF. US$ 25 por tanque
Trimix 21/35 80 CUF. US$ 85 per tank
Cave equipment:
Sidemount harness (Rental US$ 20 x day).
Sidemount Regulator Set (Rental US$ 25 x day).
Twinset Wing / Backplate (Alquiler US$ 20 x día).
Twinset Regulator Set (Rental US$ 25 x day).
Stage and Rig Regulator (US$ 15 x day).
Cave Primary Lamp (US$ 20 x day).
Back-up lamp (US$ 5 x day).
Scrubber
EAC cartridge US$ 85 (4-5 hours of scrubbing approx.)
Sofnolime 8 - 12 US$ 12 x lb.
Important Information:
Plan carfully your trip to minimize your enviromental impact, please avoid sunscreen / mosquito repellent or other skin products for all water activities. Whenever possible, choose rechargable batteries and aviod to carring things like disposable razors, plastic bags, plastic water bottels, etc. We are in a very fragil and pristine enviroment and is our responsability to keep it that way.
We will do our best to improve your skills and knowledge, we will also establish the best training plan according to the skills and experience of each diver to help them succeed in the course, but consider that sometimes we need extra days to reach the objectives with a classroom or water sessions and apply extra fee if necessary. We strongly recommend students to plan at least two extra days just in case.
Notes:
Please bring change of clothes & towels for cenote training days.
All courses are available in English or Spanish.